Kill switch to guard additional security checks performed by the browser
process on opaque origins, such as when verifying source origins for
postMessage. See https://crbug.com/40109437.

Warm up a spare renderer after each navigation on Android.

Launches the audio service on the browser startup.

Runs the audio service in a separate process.

Enables the audio-service sandbox. This feature has an effect only when the
kAudioServiceOutOfProcess feature is enabled.

Kill switch for Background Fetch.

Enable using the BackForwardCache.

Allows pages that created a MediaSession service to stay eligible for the
back/forward cache.

Set a time limit for the page to enter the cache. Disabling this prevents
flakes during testing.

BackForwardCacheMemoryControls is enabled only on Android to disable
BackForwardCache for lower memory devices due to memory limitations.

If enabled, makes battery saver request heavy align wake ups.

When this feature is enabled, private network requests initiated from
non-secure contexts in the public address space  are blocked.

See also:
- https://wicg.github.io/private-network-access/#integration-fetch
- kBlockInsecurePrivateNetworkRequestsFromPrivate
- kBlockInsecurePrivateNetworkRequestsFromUnknown

When this feature is enabled, requests to localhost initiated from non-secure
contexts in the private IP address space are blocked.

See also:
- https://wicg.github.io/private-network-access/#integration-fetch
- kBlockInsecurePrivateNetworkRequests

Enables use of the PrivateNetworkAccessNonSecureContextsAllowed deprecation
trial. This is a necessary yet insufficient condition: documents that wish to
make use of the trial must additionally serve a valid origin trial token.

Broker file operations on disk cache in the Network Service.
This is no-op if the network service is hosted in the browser process.

When enabled, mouse user activation will be verified by the browser side.

Allows pages with cache-control:no-store to enter the back/forward cache.
Feature params can specify whether pages with cache-control:no-store can be
restored if cookies change / if HTTPOnly cookies change.
TODO(crbug.com/40189625): Enable this feature.

This killswitch is distinct from the OT.
It allows us to remotely disable the feature, and get it to stop working even
on sites that are in possession of a valid token. When that happens, all API
calls gated by the killswitch will fail graceully.

If enabled, CSC permissions are sticky - as all other permissions.
If disabled, CSC permissions are scoped to the capture session's duration.

Clear the window.name property for the top-level cross-site navigations that
swap BrowsingContextGroups(BrowsingInstances).

Gate access to cookie deprecation API which allows developers to opt in
server side testing without cookies.
(See https://developer.chrome.com/en/docs/privacy-sandbox/chrome-testing)

When enabled, the DevTools Privacy UI is displayed.

Enables Blink cooperative scheduling.

Enables crash reporting via Reporting API.
https://www.w3.org/TR/reporting/#crash-report

Enables deferring the creation of the speculative RFH when the navigation
starts. The creation of a speculative RFH consumes about 2ms and is blocking
the network request. With this feature the creation will be deferred until
the browser initializes the network request. The speculative RFH will be
created while the network service is sending the request in parallel.

Controls whether the Digital Goods API is enabled.
https://github.com/WICG/digital-goods/

Enables the DIPS (Detect Incidental Party State) feature.
On by default to allow for collecting metrics. All potentially dangerous
behavior (database persistence, DIPS deletion) will be gated by params.

Whether DIPS deletes Privacy Sandbox data.

Enables HW decode acceleration for WebRTC.

Enables HW encode acceleration for WebRTC.

Enables a discard operation on WebContents to free associated resources.
Eliminates the need to destroy the WebContents object to free its resources.

Enables disconnecting the ExtensionMessagePort when the page using the port
enters BFCache.

Enable drawing under System Bars within DisplayCutout.

Enable establishing the GPU channel early in renderer startup.

Enables canvas 2d methods BeginLayer and EndLayer.

Enables service workers on chrome-untrusted:// urls.

Enables service workers on chrome:// urls.

Ensures the renderer is not dead when getting the process host for a site
instance.

Enables JavaScript API to intermediate federated identity requests.
Note that actual exposure of the FedCM API to web content is controlled
by the flag in RuntimeEnabledFeatures on the blink side. See also
the use of kSetOnlyIfOverridden in content/child/runtime_features.cc.
We enable it here by default to support use in origin trials.

Enables the "Use a different account" button in the FedCM account chooser to
log in to another IDP account, if the IDP opts in.

Enables usage of the FedCM Authz API.

Enables usage of the FedCM ButtonMode feature.
Note that actual exposure of the API to web content is controlled by
the flag in RuntimeEnabledFeatures on the blink side. See also the use
of kSetOnlyIfOverridden in content/child/runtime_features.cc. We enable
it here by default to support use in origin trials.

Enables usage of the FedCM IdP Registration API.

Enables the IDP signin status API for use with FedCM, including avoiding
network requests when not signed in and mismatch handling.
When turned off, Login-Status headers are still parsed and processed
and FedCM mismatch metrics are collected.

Enables usage of the FedCM API with metrics endpoint at the same time.

Enables usage of the FedCM API with multiple identity providers at the same
time.

Enables usage of the FedCM API with the Selective Disclosure API at the same
time.

Enables bypassing the well-known file enforcement.

Enables browser-side focus verification when crossing fenced boundaries.

Whether a memory pressure signal in a renderer should be forwarded to Blink
isolates. Forwarding the signal triggers a GC (critical) or starts
incremental marking (moderate), see v8::Heap::CheckMemoryPressure.

Enables the Digital Credential API.

Enables scrollers inside Blink to store scroll offsets in fractional
floating-point numbers rather than truncating to integers.

Puts network quality estimate related Web APIs in the holdback mode. When the
holdback is enabled the related Web APIs return network quality estimate
set by the experiment (regardless of the actual quality).

Determines if an extra brand version pair containing possibly escaped double
quotes and escaped backslashed should be added to the Sec-CH-UA header
(activated by kUserAgentClientHint)

See crbug.com/359623664

Controls whether we ignore duplicate navigations or not, in favor of
preserving the already ongoing navigation.

Kill switch for the GetInstalledRelatedApps API.

Allow Windows specific implementation for the GetInstalledRelatedApps API.

Enable support for isolated web apps. This will guard features like serving
isolated web apps via the isolated-app:// scheme, and other advanced isolated
app functionality. See https://github.com/reillyeon/isolated-web-apps for a
general overview.
Please don't use this feature flag directly to guard the IWA code.  Use
IsolatedWebAppsPolicy::AreIsolatedWebAppsEnabled() in the browser process or
check kEnableIsolatedWebAppsInRenderer command line flag in the renderer
process.

Enables a new Automatic Fullscreen content setting that lets allowlisted
origins use the HTML Fullscreen API without transient activation.
https://chromestatus.com/feature/6218822004768768

Enables process isolation of fenced content (content inside fenced frames)
from non-fenced content. See
https://github.com/WICG/fenced-frame/blob/master/explainer/process_isolation.md
for rationale and more details.

Alternative to switches::kIsolateOrigins, for turning on origin isolation.
List of origins to isolate has to be specified via
kIsolateOriginsFieldTrialParamName.

Enable lazy initialization of the media controls.

Enables reporting of Cookie Issues for Legacy Technology Report.

Configures whether Blink on Windows 8.0 and below should use out of process
API font fallback calls to retrieve a fallback font family name as opposed to
using a hard-coded font lookup table.

Uses ThreadType::kDisplayCritical for the main thread

The MBI mode controls whether or not communication over the
AgentSchedulingGroup is ordered with respect to the render-process-global
legacy IPC channel, as well as the granularity of AgentSchedulingGroup
creation. This will break ordering guarantees between different agent
scheduling groups (ordering withing a group is still preserved).
DO NOT USE! The feature is not yet fully implemented. See crbug.com/1111231.

When NavigationNetworkResponseQueue is enabled, the browser will schedule
some tasks related to navigation network responses in a kHigh priority
queue.

If the network service is enabled, runs it in process.

Kill switch for Web Notification content images.

Enables the notification trigger API.

Feature which holdbacks NoStatePrefetch on all surfaces.

Controls the Origin-Agent-Cluster header. Tracking bug
https://crbug.com/1042415; flag removal bug (for when this is fully launched)
https://crbug.com/1148057.

The name is "OriginIsolationHeader" because that was the old name when the
feature was under development.

History navigation in response to horizontal overscroll (aka gesture-nav).

Partitioned Popins must have a Popin-Policy in their top-frame HTTP Response
that permits the opener origin. This feature disables that check for purposes
of testing only, this must never be enabled by default in any context.
See https://explainers-by-googlers.github.io/partitioned-popins/

Enables additional ChildProcessSecurityPolicy enforcements for PDF renderer
processes, including blocking storage and cookie access for them.

TODO(https://crbug.com/40205612): Remove this kill switch once the PDF
enforcements are verified not to cause problems.

Whether web apps can run periodic tasks upon network connectivity.

Kill-switch to introduce a compatibility breaking restriction.

Enables Persistent Origin Trials. It causes tokens for an origin to be stored
and persisted for the next navigation. This way, an origin trial can affect
things before receiving the response, for instance it can affect the next
navigation's network request.

If enabled, browser-initiated prefetch is allowed.
Please see crbug.com/40946257 for more details.

Enables exposure of ads APIs in the renderer: Attribution Reporting,
FLEDGE, Topics, along with a number of other features actively in development
within these APIs.

Enables Private Network Access checks for all types of web workers.

This affects initial worker script fetches, fetches initiated by workers
themselves, and service worker update fetches.

The exact checks run are the same as for other document subresources, and
depend on the state of other Private Network Access feature flags:

- kBlockInsecurePrivateNetworkRequests
- kPrivateNetworkAccessSendPreflights
- kPrivateNetworkAccessRespectPreflightResults

Enables Private Network Access checks in warning mode for all types of web
workers.

Does nothing if kPrivateNetworkAccessForWorkers is disabled.

If both this and kPrivateNetworkAccessForWorkers are enabled, then PNA
preflight requests for workers are not required to succeed. If one fails, a
warning is simply displayed in DevTools.

Enables Private Network Access checks for navigations.

The exact checks run are the same as for document subresources, and depend on
the state of other Private Network Access feature flags:
- kBlockInsecurePrivateNetworkRequests
- kPrivateNetworkAccessSendPreflights
- kPrivateNetworkAccessRespectPreflightResults

Enables Private Network Access checks in warning mode for navigations.

Does nothing if kPrivateNetworkAccessForNavigations is disabled.

If both this and kPrivateNetworkAccessForNavigations are enabled, then PNA
preflight requests for navigations are not required to succeed. If
one fails, a warning is simply displayed in DevTools.

Requires that CORS preflight requests succeed before sending private network
requests. This flag implies kPrivateNetworkAccessSendPreflights.
See: https://wicg.github.io/private-network-access/#cors-preflight

Enables sending CORS preflight requests ahead of private network requests.
See: https://wicg.github.io/private-network-access/#cors-preflight

Enables origin-keyed processes by default, unless origins opt out using
Origin-Agent-Cluster: ?0. This feature only takes effect if the Blink feature
OriginAgentClusterDefaultEnable is enabled, since origin-keyed processes
require origin-agent-clusters.

Fires the pushsubscriptionchange event defined here:
https://w3c.github.io/push-api/#the-pushsubscriptionchange-event
for subscription refreshes, revoked permissions or subscription losses

When enabled, queues navigations instead of cancelling the previous
navigation if the previous navigation is already waiting for commit.
See https://crbug.com/838348 and https://crbug.com/1220337.

When enabled, sends SubresourceResponseStarted IPC only when the user has
allowed any HTTPS-related warning exceptions. From field data, (see
SSL.Experimental.SubresourceResponse), ~100% of subresource notifications
are not required, since allowing certificate exceptions by users is a rare
event. Hence, if user has never allowed any certificate or HTTP exceptions,
notifications are not sent to the browser. Once we start sending these
messages, we keep sending them until all exceptions are revoked and browser
restart occurs.

Enable using the RenderDocument.

Restrict the maximum number of concurrent ThreadPool tasks when a renderer is
low priority.

Set a tri-state priority on v8 isolates reflecting the renderer priority.

Reuse compositor instances with RenderDocument

Enables retrying to obtain list of available cameras after restarting the
video capture service if a previous attempt failed, which could be caused
by a service crash.

Reuses RenderProcessHost up to a certain threshold. This mode ignores the
soft process limit and behaves just like a process-per-site policy for all
sites, with an additional restriction that a process may only be reused while
the number of main frames in that process stays below a threshold.

Enables ServiceWorker static routing API.
https://github.com/WICG/service-worker-static-routing-api

Run video capture service in the Browser process as opposed to a dedicated
utility process.
Camera requests from Lacros are forwarded to Ash via a Mojo connection
established through cros-api. Since cros-api isn't available in utility
processes, Lacros's video capture service has to run within the browser
process.

Update scheduler settings using resourced on ChromeOS.

Browser-side feature flag for Secure Payment Confirmation (SPC) that also
controls the render side feature state. SPC is not currently available on
Linux or ChromeOS, as it requires platform authenticator support.

Used to control whether to remove the restriction that PaymentCredential in
WebAuthn and secure payment confirmation method in PaymentRequest API must
use a user verifying platform authenticator. When enabled, this allows using
such devices as UbiKey on Linux, which can make development easier.

Service worker based payment apps as defined by w3c here:
https://w3c.github.io/webpayments-payment-apps-api/
TODO(rouslan): Remove this.

http://tc39.github.io/ecmascript_sharedmem/shmem.html
This feature is also enabled independently of this flag for cross-origin
isolated renderers.

If enabled, SharedArrayBuffer is present and can be transferred on desktop
platforms. This flag is used only as a "kill switch" as we migrate towards
requiring 'crossOriginIsolated'.

Kill switch for creating first-party StorageKeys in
RenderFrameHostImpl::CalculateStorageKey for frames with extension URLs.

If enabled, GetUserMedia API will only work when the concerned tab is in
focus

This is intended as a kill switch for the WebOTP Service feature. To enable
this feature, the experimental web platform features flag should be set.

Enable the web lockscreen API implementation
(https://github.com/WICG/lock-screen) in Chrome.

When enabled, puts subframe data: URLs in a separate SiteInstance in the same
SiteInstanceGroup as the initiator.

Controls whether to isolate sites of documents that specify an eligible
Cross-Origin-Opener-Policy header.  Note that this is only intended to be
used on Android, which does not use strict site isolation. See
https://crbug.com/1018656.

When enabled, OOPIFs will not try to reuse compatible processes from
unrelated tabs.

Controls whether SpareRenderProcessHostManager tries to always have a warm
spare renderer process around for the most recently requested BrowserContext.
This feature is only consulted in site-per-process mode.

Controls whether site isolation should use origins instead of scheme and
eTLD+1.

Controls whether subframe process reuse should be restricted according to
resource usage policies. Namely, a process that is already consuming too
much memory is not attempted to be reused.

Disallows window.{alert, prompt, confirm} if triggered inside a subframe that
is not same origin with the main frame.

Dispatch touch events to "SyntheticGestureController" for events from
Devtool Protocol Input.dispatchTouchEvent to simulate touch events close to
real OS events.

This feature allows touch dragging and a context menu to occur
simultaneously, with the assumption that the menu is non-modal.  Without this
feature, a long-press touch gesture can start either a drag or a context-menu
in Blink, not both (more precisely, a context menu is shown only if a drag
cannot be started).

This feature is for a reverse Origin Trial, enabling SharedArrayBuffer for
sites as they migrate towards requiring cross-origin isolation for these
features.
TODO(bbudge): Remove when the deprecation is complete.
https://developer.chrome.com/origintrials/#/view_trial/303992974847508481
https://crbug.com/1144104

Enable using browser-calculated origins on navigations, instead of
renderer-calculated ones.

Allows user activation propagation to all frames having the same origin as
the activation notifier frame.  This is an intermediate measure before we
have an iframe attribute to declaratively allow user activation propagation
to subframes.

Enables comparing browser and renderer's DidCommitProvisionalLoadParams in
RenderFrameHostImpl::VerifyThatBrowserAndRendererCalculatedDidCommitParamsMatch.

Enables future V8 VM features

Enables per PWA System Media Controls. Only supported on Windows and macOS.

Enable WebAssembly baseline compilation (Liftoff).

Enable WebAssembly JSPI.

Enable WebAssembly lazy compilation (JIT on first call).

Enable WebAssembly Memory64.

Enable WebAssembly tiering (Liftoff -> TurboFan).

Enable WebAssembly trap handler.

Controls whether the Web Bluetooth API is enabled:
https://webbluetoothcg.github.io/web-bluetooth/

Controls whether Web Bluetooth should use the new permissions backend. The
new permissions backend uses ObjectPermissionContextBase, which is used by
other device APIs, such as WebUSB. When enabled,
WebBluetoothWatchAdvertisements and WebBluetoothGetDevices blink features are
also enabled.

Controls which backend is used to retrieve OTP on Android. When disabled
we use User Consent API.

The JavaScript API for payments on the web.

Enables code caching for scripts used on WebUI pages.

Controls whether the WebUSB API is enabled:
https://wicg.github.io/webusb

Controls whether the WebXR Device API is enabled.

Enable the navigator.permissions API.
Used for launch in WebView, but exposed in content to map to runtime-enabled
feature.

Create the spare renderer in DidStopLoading rather than in
SpareRenderProcessHostManager::PrepareForFutureRequests.

The delay for creating the Android spare renderer in
SpareRenderProcessHostManager::PrepareForFutureRequests.

The timeout for the created spare renderer after each navigation on Android.
The created renderer will be destroyed after the timeout.
A negative value indicates that no timeout will be set for the spare
renderer.

Enables the audio-service sandbox. This feature has an effect only when the

Set a time limit for the page to enter the cache. Disabling this prevents

BackForwardCache is disabled on low memory devices. The threshold is defined
via a field trial param: "memory_threshold_for_back_forward_cache_in_mb"

When this feature is enabled, private network requests initiated from
non-secure contexts in the public address space  are blocked.

See also:

When this feature is enabled, requests to localhost initiated from non-secure
contexts in the private IP address space are blocked.

When this feature is enabled, requests to localhost initiated from non-secure
contexts in the private IP address space are blocked.

See also:
- https://wicg.github.io/private-network-access/#integration-fetch
- kBlockInsecurePrivateNetworkRequests

Enables crash reporting via Reporting API.

Enables deferring the creation of the speculative RFH when the navigation

Enables deferring the creation of the speculative RFH when the navigation
starts. The creation of a speculative RFH consumes about 2ms and is blocking
the network request. With this feature the creation will be deferred until
the browser initializes the network request. The speculative RFH will be

When enabled, the browser will create the render process if necessary even
if the speculative render frame host creation is deferred by feature

When enabled, the browser will not try to create a speculative RFH after
loading starts for BFCache restore and prerender activation. The
OnResponseStarted function will be called immediately and the RFH will be
created there.

Enables usage of the FedCM ButtonMode feature.
Note that actual exposure of the API to web content is controlled by
the flag in RuntimeEnabledFeatures on the blink side. See also the use

Enables usage of the FedCM API with metrics endpoint at the same time.

Enables usage of the FedCM API with multiple identity providers at the same
time.

Enables scrollers inside Blink to store scroll offsets in fractional
floating-point numbers rather than truncating to integers.

Puts network quality estimate related Web APIs in the holdback mode. When the

Determines if an extra brand version pair containing possibly escaped double

Enable support for isolated web apps. This will guard features like serving

Enable support for isolated web apps. This will guard features like serving
isolated web apps via the isolated-app:// scheme, and other advanced isolated
app functionality. See https://github.com/reillyeon/isolated-web-apps for a
general overview.
Please don't use this feature flag directly to guard the IWA code.  Use

Partitioned Popins must have a Popin-Policy in their top-frame HTTP Response
that permits the opener origin. This feature disables that check for purposes

Enables additional ChildProcessSecurityPolicy enforcements for PDF renderer
processes, including blocking storage and cookie access for them.

Enables Persistent Origin Trials. It causes tokens for an origin to be stored
and persisted for the next navigation. This way, an origin trial can affect

Enables exposure of ads APIs in the renderer: Attribution Reporting,

Enables Private Network Access checks in warning mode for navigations.

Does nothing if kPrivateNetworkAccessForNavigations is disabled.

If both this and kPrivateNetworkAccessForNavigations are enabled, then PNA
preflight requests for navigations are not required to succeed. If
one fails, a warning is simply displayed in DevTools.

Fires the pushsubscriptionchange event defined here:
https://w3c.github.io/push-api/#the-pushsubscriptionchange-event

When enabled, sends SubresourceResponseStarted IPC only when the user has
allowed any HTTPS-related warning exceptions. From field data, (see

RenderDocument:

Currently, a RenderFrameHost represents neither a frame nor a document, but a

RenderDocument:

Currently, a RenderFrameHost represents neither a frame nor a document, but a
frame in a given process. A new one is created after a different-process
navigation. The goal of RenderDocument is to get a new one for each document
instead.

When kProcessPerSiteUpToMainFrameThreshold is enabled, allows process reuse
even when DevTools was ever attached. This allows developers to test the
process sharing mode, since DevTools normally disables it for the field

Specifies the total memory limit for kProcessPerSiteUpToMainFrameThreshold
feature. This is a limit of the private memory footprint calculation, if

Enables ServiceWorker static routing API.

Used to control whether to remove the restriction that PaymentCredential in
WebAuthn and secure payment confirmation method in PaymentRequest API must

Kill switch for creating first-party StorageKeys in
RenderFrameHostImpl::CalculateStorageKey for frames with extension URLs.

This feature param (true by default) controls whether sites are persisted

Disallows window.{alert, prompt, confirm} if triggered inside a subframe that
is not same origin with the main frame.

Dispatch touch events to "SyntheticGestureController" for events from
Devtool Protocol Input.dispatchTouchEvent to simulate touch events close to

This feature allows touch dragging and a context menu to occur
simultaneously, with the assumption that the menu is non-modal.  Without this
feature, a long-press touch gesture can start either a drag or a context-menu

When the context menu is triggered, the browser allows motion in a small

Allows user activation propagation to all frames having the same origin as
the activation notifier frame.  This is an intermediate measure before we
have an iframe attribute to declaratively allow user activation propagation
to subframes.

Enable WebAssembly trap handler.

Apply text selection menu order correction logic for Android.

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 Use a minimum role of group on elements that are keyboard-focusable.
 See https://w3c.github.io/html-aam/#minimum-role.

 Enforce no accessible name on objects that have a role where names are
 prohibited (listed in https://w3c.github.io/aria/#namefromprohibited):
 log a friendly error in the developer console, and trigger a DCHECK().
 The incorrect markup situation will be repaired, and the name will
 be exposed as a description instead.
 TODO(crbug.com/350528330,
 https://github.com/web-platform-tests/interop-accessibility/issues/133,
 https://github.com/w3c/accname/issues/240,
 https://github.com/w3c/accname/issues/241): If community feedback is
 positive, and WPT + accname testable statements are updated to allow
 this, then add status: test.

 Interest Group JS API/runtimeflag.

 Adjust the end of the next paragraph if the end position for the
 paragraph is updated while moving the paragraph. See
 https://crbug.com/329121649

 A origin trial is feature is required for the build to success.
 The feature reuses the AISummarizationAPI. Any other origin trial
 features in the implied_by list will enable this feature as well.

 If enabled, blink will not set the autofill state of a field after JS
 modifies its value, and will instead leave it to the WebAutofillClient to
 take care of the state setting.
 This feature should be enabled with
 autofill::features::kAutofillFixCachingOnJavaScriptChanges.

 https://chromestatus.com/feature/5083257285378048

 See https://crbug.com/40150299, and
 https://github.com/whatwg/dom/issues/1255.

 This is not going into origin trial, "origin_trial_feature_name" is
 required for using the "implied_by" behaviour.

 AudioContext.playoutStats interface.
 https://chromestatus.com/feature/5172818344148992

 Killswitch activated for crbug.com/365405756; need to re-enable this.

 Killswitch. Remove after 1 or 2 stable releases.

 When enabled, enforces new interoperable semantics for 3D transforms.
 See crbug.com/1008483.

 Used to enable Blink side of features flags for Default Nav Transition.

 When the  element href attribute scheme is "data" or "javascript",
 set element's frozen base URL to document's fallback base URL.
 This feature was shipped in M129, so this flag can be removed in M131.

 crbug.com/1147998: Mouse and Pointer boundary event dispatch (i.e. dispatch
 of enter, leave, over, out events) tracks DOM node removal to fix event
 pairing on ancestor nodes.

 Full support for box-decoration-break, including block fragmentation,
 not just -webkit-box-decoration-break with inlines at line breaks.

 crbug.com/371615505

 Bypasses the enforcement of the Page Embedded Permission Control
 security checks. This flag is disabled by default and should only be
 enabled in automated tests in order to allow them to avoid needing to
 wait until the PEPC is validated and also to use JS-initiated clicks.

 This is a kill switch for shaping directly in TextMetrics when
 ctx.measureText() is called. Disabled after speedometer regression:
 https://crbug.com/362784008.

 https://github.com/Igalia/explainers/blob/main/canvas-formatted-text/html-in-canvas.md

 Kill switch for https://crbug.com/330506337.

 TODO(crbug.com/1444712): Before enabling that flag by default,
 make sure MouseCursorOverlayController does not transmit mouse
 events to a CaptureController that don't have any
 capturedmousechange listener attached to it.
 See https://github.com/screen-share/mouse-events/issues/14

 https://www.w3.org/TR/cssom-view-1/#dom-document-caretpositionfrompoint

 Kill switch for changes to RenderFrameMetadataObserverImpl in connection with Engagement
 Signals. See https://crrev.com/c/4544201 and https://crbug.com/1458640.

 crbug.com/40702380

 Avoid queuing a task to fire a selectionchange event when there is already a task scheduled
 to do that for the target according to the new spec:
 https://w3c.github.io/selection-api/#scheduling-selectionhange-event

 Enable support for Controlled Frame, providing the Controlled
 Frame tag to IWA apps and other contexts. See
 https://github.com/WICG/controlled-frame/blob/main/README.md for more
 info.

 Controls whether form elements may delay editor creation until layout.
 This is a kill switch. See https://crbug.com/325613706 for details.

 Allow WebAuthn relying parties to report information about existing
 credentials back to credential storage providers.

 The AccentColor And AccentColorText CSS system color keywords

 CSS attr() function that accepts not only string types
 and can be used in all properties.
 https://drafts.csswg.org/css-values-4/#attr-notation

 Support for the anchor-scope property.
 https://drafts.csswg.org/css-anchor-position-1/#anchor-scope

 Support anchor-size() values in inset and margin properties.

 Support for  syntax in @property
 https://drafts.css-houdini.org/css-properties-values-api-1/#syntax-strings

 Whether  values are allowed as counter style 

 https://drafts.csswg.org/css-counter-styles/#counter-style-speak-as

 https://chromestatus.com/feature/5125388091260928

 Support CSS Values Level 4 calc simplification and serialization
 as specified in the specs below.
 https://drafts.csswg.org/css-values-4/#calc-simplification
 https://drafts.csswg.org/css-values-4/#calc-serialize

 https://chromestatus.com/feature/5196713071738880
 Shipped in M129.  Should be safe to remove the flag a bit after
 M129 has shipped to stable.

 https://chromestatus.com/feature/5082469066604544

 Fix for https://issues.chromium.org/40280846 .  Shipped in M130.
 Should be safe to remove a bit after M130 has shipped to stable.

 Support case-sensitive attribute selector modifier
 https://drafts.csswg.org/selectors-4/#attribute-case

 Unprefixed cross-fade() (in addition to the existing -webkit-cross-fade()).
 https://drafts.csswg.org/css-images-4/#cross-fade-function

 This flag controls whether the deprecated :--foo syntax is enabled. It
 is being replaced by :state(foo), which is controlled by the
 CSSCustomStateNewSyntax flag.
 TODO(crbug.com/1514397): Remove this when the feature is fully launched.

 This flag controls whether the :state(foo) pseudo-class for custom
 elements is enabled. It is a rename of :--foo, which is being
 deprecated and is controlled by the CSSCustomStateDeprecatedSyntax
 flag.
 TODO(crbug.com/1514397): Remove this when the deprecation is done.

 Include custom properties in CSSComputedStyleDeclaration::item/length.
 https://crbug.com/949807

 Spec change to search for container query and container units up the
 flat tree instead of the shadow-including ancestors.

 https://chromestatus.com/feature/5157805733183488

 This needs to be kept as a runtime flag as long as we need to forcibly
 disable it for WebView on Android versions older than P. See
 https://crrev.com/f311a84728272e30979432e8474089b3db3c67df

 The inset-area CSS property has been renamed to position-area. This
 feature (CSSInsetAreaProperty) enables the old inset-area property.
 This was deprecated in M129, and disabled by default in M131. Assuming
 no issues, this flag can be removed in M133.

 https://chromestatus.com/feature/6289894144212992

 Flag so that we can Finch the effects of our SIMD fast-path for
 skipping lazily-parsed CSS declaration blocks faster.

 https://github.com/w3c/csswg-drafts/issues/10435

 Ignore the stylesheet encoding when parsing URLs, always using UTF-8.
 See crbug.com/1485525.

 Shipped in M130.  Should be removed a little bit after M130 reaches
 stable.

 For the position-try-fallbacks property, replaces the inset-area()
 syntax (which had the old "inset-area" name) with just a
 <'position-area'>.

 https://drafts.csswg.org/css-values-5/#progress
 progress(), media-progress(), container-progress()

 For ::column pseudo element for fragment styling.
 https://github.com/flackr/carousel/blob/main/fragmentation/README.md

 Enables the :has-slotted pseudo-selector.
 https://chromestatus.com/feature/5134941143433216

 Enables the :open and :closed pseudo-selectors.
 https://chromestatus.com/feature/5085419215781888

 When an audio, video, or similar resource is "playing"
 or "paused".
 https://www.w3.org/TR/selectors-4/#video-state

 For ::scroll-up-button and ::scroll-down-button pseudo elements for Carousel.
 https://github.com/flackr/carousel/tree/main/scroll-button

 For ::scroll-marker and ::scroll-marker-group pseudo elements for Carousel.
 https://github.com/flackr/carousel/tree/main/scroll-marker

 TODO(crbug.com/40932006): Non-standard 'reading-flow' keyword
 for reading of grid and flexbox items.
 https://drafts.csswg.org/css-display-4/#reading-flow

 https://drafts.csswg.org/css-color-5/#relative-colors

 crbug.com/359616070

 crbug.com/365818844

 crbug.com/325309578

 Non-standard 'auto' keyword for the CSS resize property. Used for
 selectively enable resize corner for textarea via UA stylesheet, but
 unintentionally exposed to author sheets. UA rule is now using
 -internal-textarea-auto instead.

 https://drafts.csswg.org/css-scroll-snap-2/#scrollsnapchange

 https://drafts.csswg.org/css-scroll-snap-2/#scrollsnapchanging

 https://drafts.csswg.org/css-scroll-snap-2/#snap-events

 https://drafts.csswg.org/css-scroll-snap-2#scroll-start

 https://drafts.csswg.org/css-scroll-snap-2#scroll-start-target

 Flag for supporting scroll-state() and container-type: scroll-state
 Implied by supporting at least one of the scroll-state query features.

 Explainer: https://drafts.csswg.org/css-values/#round-func

 Allows the CSS "accent-color" property to support the system accent color as the default option.

 crbug.com/1463890: CSS text-autospace property

 TODO(https://crbug.com/1411581):
 https://w3c.github.io/csswg-drafts/css-inline-3/#propdef-leading-trim

 crbug.com/1463890, crbug.com/1463891: CSS text-spacing shorthand

 Support for tree-scoped [1] timeline names (e.g. produced by
 scroll-timeline).

 [1] https://drafts.csswg.org/css-scoping-1/#shadow-names

 Support for user-select:contain.

 https://chromestatus.com/feature/5064894363992064

 https://chromestatus.com/feature/5064894363992064

 Support the 'inert' keyword for the visibility property.

 Adds the appearance:base-select CSS value which makes 
 rendering using alternate content in the UA shadowroot which is
 customizable.

 Remove this feature when the removal of the GPUAdapter
 requestAdapterInfo method has been stable long enough.
 See https://crbug.com/335383516

 This allows pages to opt out of the unload deprecation. Enabling this
 allows unload event handers to be used in the frame regardless of any
 Permissions-Policy setting.
 https://crbug.com/1432116

 Enabled in M131.  Can be removed a bit after M131 reaches stable.

 This feature makes the 
 element close properly when its "open"
 attribute is removed. https://github.com/whatwg/html/issues/5802

 This feature makes the dialog element fire beforetoggle and toggle
 events every time it is closed or opened.
 https://bugs.chromium.org/p/chromium/issues/detail?id=1521813

 Shipping in M130.  Flag should be removed after M130 has been
 shipping to stable for a few weeks.

 Disables anti-aliasing for the Ahem font. Anti-aliasing this font breaks a
 significant amount of WPT test expectations.

 This feature will represent the extension of a deprecation trial that
 allows first parties to temporarily use unpartitioned storage in embeds
 loaded on their site. It replaces an old DT named
 DisableThirdPartyStoragePartitioning which expired in M126.

 Dispatch beforeinput event for number input according to the spec:
 https://w3c.github.io/uievents/#event-type-beforeinput

 This is landing in M127, and can be removed in M129.

 When disabled, beforeinput event will not be fired when spin button
 interactions like ArrowUp, ArrowDown and mouse click on spin button
 are made on number input.

 kHidden and kHiddenButPainting visibility states are treated as
 hidden in the sense of document.visibilityState.  However, they are
 handled differently internally.  For example, video playback should
 continue in kHiddenButPainting, such as when the page is being
 background captured.  When enabled, this feature causes blink to
 notify internal observers about visibility changes between the two
 hidden states, in addition to transitions to/from kVisible.

 Since the two hidden states are exposed to the web identically, there
 is no visibilitychanged event fired when switching between them.

 When this feature is disabled, blink reverts to its original behavior
 of eliding transitions between the two hidden states, including to
 internal observers.  This behavior causes problems with capture and
 picture-in-picture, but is preserved as a safe fallback.

 Dispatch selectionchange event per element according to the new spec:
 https://w3c.github.io/selection-api/#selectionchange-event

 Allowing elements with display:contents to have focus.
 See https://crbug.com/1366037

 This is a performance fix for  popups which was enabled by
 default in M128.

 Enables preferInitialWindowPlacement Document PiP option to skip
 re-using the previous pip window bounds.

 Enables propagating user activation from a document picture-in-picture
 window up to its opener window and vice versa.

 Enables the ability to use Document Policy header to control feature
 DocumentDomain.

 Enables the ability to use Document Policy header to control feature
 ExpectNoLinkedResources.

 Enables the ability to use Document Policy header to control feature
 IncludeJSCallStacksInCrashReports. https://chromestatus.com/feature/4731248572628992

 Enables the ability to use Document Policy header to control feature
 SyncXHR.

 https://chromestatus.com/feature/5113053598711808

 Drop the entire URL as plaintext in plaintext only editable position.
 Fix for https://crbug.com/40895258. This change is landing in M127 and
 the flag can be removed in M129 in case of no issues.

 Dynamically change the safe area insets based on the bottom browser
 controls visibility.

 Dynamically change the safe area insets as browser controls scrolls.

 TODO(crbug.fom/41492947) This is the "old" version of getInnerHTML()
 used for declarative shadow DOM, and this version is deprecated and
 currently being removed via Finch. It has been removed via Finch at
 5+ percent of Stable users, and that ramp will continue. So this
 feature is now disabled by default in code, starting M131. This flag
 can be removed in M133, assuming no issues. In the meantime,
 replacement API is called getHTML() and that shipped in M125.

 Experiment with preventing some instances of mutation XSS
 by escaping "<" and ">" in attribute values.
 See: crbug.com/1175016

 When the fling is active, a tap on the page can stop scroll. When
 calculating the input latency, we should exclude all the input events
 caused by this tap.

 Killswitch. Remove after 1-2 stable releases, and rename
 cc::ScrollNode::main_thread_scrolling_reasons to
 main_thread_repaint_reasons.

 Kill switch.

 Allows fenced frames to access unpartioned data via Shared Storage in
 exchange for disabling untrusted network access. This is the Blink
 counterpart of the base::Feature with the same name. Because local
 unpartitioned data access requires browser and renderer process
 coordination, the value of this flag is strictly controlled by the
 base::Feature variant, and setting this flag does nothing.

 Add Request.bytes() and Response.bytes()
 https://chromestatus.com/feature/5239268180754432

 The Blink runtime-enabled feature name for the API's IDL.

 Also enabled when blink::features::kFileHandlingAPI is overridden
 on the command line (or via chrome://flags).

 Shared objects by OPFS and non-OPFS File System Access API.

 In-development features for the File System Access API.

 The FileSystemHandle.getCloudIdentifiers() method (see
 crbug.com/1443354).

 Non-OPFS File System Access API.

 OPFS File System Access API.

 The FileSystemObserver interface for the File System Access API.
 See https://crbug.com/1019297.

 The unobserve function of the FileSystemObserver.
 See https://crbug.com/321980469.

 crbug.com/369237322

 crbug.com/40755728

 crbug.com/40755728

 Enables deal support within auctions.

 Enables using a 'deprecatedRenderURLReplacements' field within the
 Protected Audience ad auction config.

 Permit trusted signals to come cross-origin, subject to CORS on the
 trusted server side and opt-in on the worklet script side.

 Enables real time reporting API in Protected Audience.
 https://github.com/WICG/turtledove/blob/main/PA_real_time_monitoring.md

 Enables using a 'reportingTimeout' field within the Protected Audience
 ad auction config.

 TODO(crbug.com/1231644): This flag is being kept (even though the
 feature has shipped) until there are settings to allow users to
 customize the feature.

 https://github.com/flackr/reduce-motion/blob/main/explainer.md

 TODO(crbug.com/1419161): Remove this feature after M113 has been stable
 for a few weeks or more. This is a kill switch that, when enabled, goes
 back to the old behavior, which was to restore the state for 
 and  even when they had autocomplete=off.

 TODO(crbug.com/1432009) Allow form controls with vertical writing mode
 to have direction affect the flow of the control.

 Updates the hanging behavior of preserved whitespace at the end of a
 line to not depend on text-align. This flag is to be used as a
 killswitch in case of any issues.
 https://github.com/w3c/csswg-drafts/issues/3440
 crbug.com/1363901

 This is a kill switch for a fix that disables painting of line box hit
 test data with HitTestOpaqueness.

 The anchor attribute, supported by both anchor positioning and the
 popover API.

 The <embed> should follow the specification, layout is not forced
 when the type attribute is set to image.
 https://html.spec.whatwg.org/C/#the-embed-element
 This feature was shipped in M131, so this flag can be removed in M133.

 Adds support for the experimental interesttarget
 attributes, as specified in the open-ui "Interest Invokers" explainer.
 https://open-ui.org/components/interest-invokers.explainer/

 Additional default invoke actions that aren't part of v1 of invokers.
 When this flag is disabled only v1 actions (popover and dialog defaults) will work.

 Adds support for the experimental invoketarget and invokeaction
 attributes, as specified in the open-ui "Invokers" explainer.
 https://open-ui.org/components/invokers.explainer/

 The <object> should follow the specification:
 > Fallback: The object element represents the element's children.
 > This is the element's fallback content.
 https://html.spec.whatwg.org/C/#the-object-element
 This feature was shipped in M131, so this flag can be removed in M133.

 A flag, just for local testing to make the
 HTML parser yield more often and take longer to resume.
 This helps when debugging flaky tests caused by parser
 yielding heuristics.

 A flag to control the popovertargetaction=hover behavior,
 and associated CSS properties.

 TODO(crbug.com/1416284): Enables popover=hint functionality.

 This change, although technically breaking, is expected to be fully web-compatible
 due to how import attributes are currently used in the ecosystem. However, this is
 a killswitch just in case. This can be removed once it ships to stable and no
 regressions are reported.

 When enabled, every traversable mainframe same-doc navigation will
 increment the viz::LocalSurfaceId from the impl thread.

 If a painting bug no longer reproduces with this feature enabled, then
 the bug is caused by incorrect cull rects.

 crbug.com/370217727

 If enabled, and the inner html parser is unable to successfully
 parse, it will log histograms of why it failed. The logging is
 non-trivial.

 Makes the HTML parser close  tags before inserting 
 tags to match the old parser behavior in case we have compat issues
 launching SelectParserRelaxation. If SelectParserRelaxation stays
 stable in M131, then this flag can be removed in M133.

 Insert a blockquote before a outer block after creating the blockquote
 when indenting a node whose outer block is a blockquote. See
 https://crbug.com/327665597

 crbug.com/1420675

 If enabled, IntersectionObserverScrollMargin will be parsed.

 Fix to crbug.com/40934455.
 Should be removed a bit after M129 reaches stable.

 Allows :target to match elements even after they are removed and
 reattached to the document. Enabled in M128, should be safe to remove
 in M133.

 TODO(crbug.com/40113891): This feature allows scrollers to be
 keyboard focusable by default. This was enabled by default in M130,
 but this flag should not be removed until the origin trial and
 enterprise policies have both expired. See the
 KeyboardFocusableScrollersOptOut flag.

 TODO(crbug.com/40113891): Disables KeyboardFocusableScrollers.
 This feature only takes effect if KeyboardFocusableScrollers is
 enabled. It will overwrite the behavior and not allow scrollers to be
 keyboard focusable by default.

 This is a killswitch for a bug fix that is shipping in M128.

 This feature makes HTMLLabelElement::DefaultEventHandler always call
 HTMLElement::DefaultEventHandler instead of only doing so
 conditionally. Shipping in M123 so should be safe to remove in M127.

 If enabled, the lazy load image observer will use a scroll margin in
 its init dictionary instead of a root margin.

 If enabled, the lazy load iframe observer will use a scroll margin in
 its init dictionary instead of a root margin.

 crbug.com/365814218

 Enables long aniamtion frames as a performance API (the
 "long-animation-frame" timeline entry)

 Long press on a link selects the link text instead of bringing up
 context menu. Enabled only on Android AuthView.

 Use LongAnimationFrameMonitor to emit longtask entries

 Set to reflect the MediaCastOverlayButton feature.

 Set to reflect the kMediaEngagementBypassAutoplayPolicies feature.

 This uses media::VideoEncoder implementation in MediaRecorder API
 instead of using MediaRecorder own video encoder implementation.

 This is a killswitch for  no
 longer accepting fractions, landed around M125.
 It can be removed in M127 if there are no problems.

 If enabled, meter elements will render with a fallback style when
 appearance is set to none.

 If enabled, the  widget appearance will devolve based on user
 declared styles as defined in the css-ui-4 spec

 This is enabled by default on Windows only. The only part that's
 "experimental" is the support on other platforms.

 Killswitch. Remove after 1 or 2 stable releases.

 MojoJSTest is used exclusively in testing environments, whereas MojoJS
 may also be used elsewhere.

 Move the selection to the last position in the list item. See
 https://crbug.com/331841851

 https://chromestatus.com/feature/6270155647352832

 crbug.com/1446498: This feature is being used for the deprecation of
 Mutation Events.

 crbug.com/1446498: This feature is just used as part of an "early trial"
 of disabling Mutation Events in Canary/Dev/Beta. If this feature is
 enabled and MutationEvents is disabled, then a special console error
 message is used to give more information.

 This is a killswitch for the behavior of Element::GetFocusableArea
 on delegatesFocus shadow hosts. This flag can be removed in M127 if
 things are stable.

 Doesn't increase the end offset on getting the range for a new line
 character. See https://crbug.com/326888905

 Doesn't insert empty blockquotes on outdenting a blockquote. See
 https://crbug.com/323960902

 Input event data for textarea should not be null for certain
 inputTypes.
 https://issues.chromium.org/issues/40737336

 TODO(crbug.com/1426629): This feature enables the deprecated value
 slider-vertical. Disable this feature to stop parsing or allowing these
 values.
 https://drafts.csswg.org/css-ui-4/#appearance-switching

 NotificationContentImage is not available in all platforms
 The Notification Center on Mac OS X does not support content images.

 Define a sample API for testing integration with the Origin Trials
 Framework. The sample API is used in both unit and web tests for the
 Origin Trials Framework. Do not change this flag to stable, as it exists
 solely to generate code used by the sample API implementation.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.
 TODO(yashard): Add tests for this feature.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.

 The following are developer opt-outs and opt-ins for page freezing. If
 neither is specified then heuristics will be applied to determine whether
 the page is eligible.

 Support for page margin boxes.
 https://www.w3.org/TR/css-page-3/#margin-boxes

 PARAKEET ad serving runtime flag/JS API.

 This is to add an option to enable the Reveal button on password inputs while waiting ::reveal gets standardized.

 https://chromestatus.com/feature/5198846820352000

 PaymentRequest is enabled by default on Android

 Enables performance.mark('mark_feature_usage'): crbug.com/1517170

 Tracking bug for the implementation: https://crbug.com/1462930

 This is a reverse OT used for a phased deprecation.
 https://crbug.com/918374

 Coalesced/predicted event targets in untrusted events.
 See https://crbug.com/353538500

 TODO(crbug.com/364669918) This enables these two new functionalities:
 1. add an imperative way to set invoker relationships between popovers.
 2. invoker relationships create implicit anchor element references.

 This is a killswitch for the behavior of 
,
 which landed in M130 and can be removed in M132.

 Adds a web setting to disable CSS ScrollbarColor, ScrollbarWidth, and
 legacy ::-webkit-scrollbar* pseudo element styling.

 Prefer not using composited scrolling. Composited scrolling will still
 be used if there are other reasons forcing compositing. For consistency,
 any code calling Settings::GetPreferCompositingToLCDTextEnabled() should
 ensure that this flag overrides the setting.

 This feature is deprecated and we are evangelizing affected sites.
 A deprecation trial is underway, starting in M125.
 See https://crbug.com/40352864 for current status

 Used to allow chrome://flags to turn off prerendering. (Without using
 the user-facing preloading settings page to turn off other
 preloading.) See https://crbug.com/1494471.

 It also has some feature params defined throughout the codebase.

 When enabled, styling for the content within heading will be
 preserved after merge.

 When enabled, prevents undo to be applied if the enclosing block
 is not editable

 Controls whether filtering IDs can be specified for Private Aggregation
 contributions. If disabled, any IDs will be ignored.

 Always allow trust token issuance (so long as the base::Feature
 is enabled). Used for testing; circumvents a runtime check that,
 if this RuntimeEnabledFeature is not present, guarantees the origin
 trial is enabled.

 Protected memory varariant of the sample API for testing integration with
 the Origin Trials Framework. This is used only in unit tests.
 Do not change this flag to stable, as it exists
 solely to generate code used by the sample API implementation.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.
 TODO(yashard): Add tests for this feature.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.

 Fix for ::cue, ::file-selector-button, and ::placeholder pseudo
 elements in getComputedStyle().

 Allowing pseudo elements to have focus.

 If enabled, the Accept-Language header will be reduced.

 If enabled, the deviceModel will be reduced to "K" and the
 androidVersion will be reduced to a static "10" string in android
 User-Agent string.

 If enabled, the minor version of the User-Agent string will be reduced.
 This User-Agent Reduction feature has been enabled starting from M101,
 but we still keep this flag for future phase tests.

 If enabled, the platform and oscpu of the User-Agent string will be
 reduced.

 See https://issues.chromium.org/40805258

 Remove a node if it's selected fully even though it has children. See
 https://crbug.com/331074432

 See https://issues.chromium.org/issues/41311101

 See https://github.com/whatwg/html/issues/10034

 The renderpriority attribute feature.
 https://github.com/WICG/display-locking/blob/main/explainers/update-rendering.md

 TODO(crbug.com/1500633): Remove this flag when the new CursorAnchorInfo
 mojo pipe is launched.

 New behavior when line breaker rewinds floats. crbug.com/1499290

 When enabled, the root element will have a placeholder after all text is deleted.
 crbug.com/40702380

 Enables the use of jitterBufferTarget attribute in WebRTC.
 Spec: https://w3c.github.io/webrtc-extensions/#dom-rtcrtpreceiver-jitterbuffertarget

 Legacy callback-based getStats() has limited availability unless this
 Deprecation Trial is enabled.
 TODO(https://crbug.com/822696): Remove when origin trial ends.

 Enables the use of |RTCRtpEncodingParameters.codec|

 Enables the use of SVC scalability mode in WebRTC.
 Spec: https://w3c.github.io/webrtc-svc/

 crbug.com/324111880

 https://wicg.github.io/webcomponents/proposals/Scoped-Custom-Element-Registries

 WebSpeech API with both speech recognition and synthesis functionality
 is not fully enabled on all platforms.

 TODO(355460994): Remove after M129.
 scroll into root frame didn't take scrollbar and borders into account,
 while this is fixed, to avoid any web compat issues we have this killswitch.

 Killswitch. Remove after M126 or M127 stable.

 Separate flag for crbug.com/1426506 (getCurrentTime API change) which
 is expected to land after the initial launch of ScrollTimeline.

 Implements documentElement.scrollTop/Left and bodyElement.scrollTop/Left
 as per the spec, matching other Web engines.

 This flag can't be removed until the Android min SDK version is 28
 (i.e., 'P') or later.  See AWSettings.setScrollTopLeftInteropEnabled
 and its caller.

 SecurePaymentConfirmation has shipped on some platforms, but its
 availability is controlled by the browser process (via the
 SecurePaymentConfirmationBrowser feature), as it requires browser
 support to function. See //content/public/common/content_features.cc

 The status is set to 'test' here to enable some WPT tests that only
 require blink-side support to function.

 SelectAudioOutput API
 https://chromestatus.com/feature/5164535504437248

 Implement Selection API across shadow DOM
 See https://w3c.github.io/selection-api/

 selection.isCollapsed should return false if anchor and focus nodes
 are different, including in shadow tree.
 https://crbug.com/40400558
 This feature was shipped in M131, so this flag can be removed in M133.

 Maintain author-defined ::selection highlight colors, even if they
 match the text color.

 Sets the minimum target size of  in  to 24x24 CSS
 pixels to meet Accessibility standards.
 https://www.w3.org/WAI/WCAG22/Understanding/target-size-minimum.html

 Makes the HTML parser allow most tags inside of  instead of
 only , , and 
.
 https://github.com/whatwg/html/issues/10310

 This flag is a performance optimization which reorganizes some code
 for handling 's popup in order to avoid expensive calls to
 InternalPopupMenu::UpdateFromElement. Added in M130, should be safe to
 remove in M133.

 Reference Target allows IDREF attributes to refer inside Shadow DOM.
 crbug.com/346835896

 crbug.com/359616076, crbug.com/360158400, and crbug.com/360903551.

 crbug.com/329677645

 crbug.com/40501131

 If enabled, HTMLPreloadScanner will be skipped.

 Added in M131, should be safe to remove after M131 ships.

 Skips the browser touch event filter, ensuring that events that reach
 the queue and would otherwise be filtered out will instead be passed
 onto the renderer compositor process as long as the page hasn't timed
 out. If skip_filtering_process is browser_and_renderer, also skip the
 renderer cc touch event filter, ensuring that events will be passed
 onto the renderer main thread.

 Used to enable the code for detecting soft navigations through task
 attribution. Set to stable as this generates an enabled-by-default
 base::Feature for a field-trial remote shutoff. Needs to be a runtime
 feature so that the Soft Navigation Heuristics Origin Trial can depend
 on it.

 This feature exists solely to be the target of implied_by for features
 that are part of this trial but which may also be enabled another way.
 Otherwise, runtime-enabled features can be added to the origin trial
 with the following:
   origin_trial_feature_name: "SpeculationRulesPrefetchFuture",
   origin_trial_allows_third_party: true,

 Used as argument in attribute of stable-release functions/interfaces
 where a runtime-enabled feature name is required for correct IDL syntax.
 This is a global flag; do not change its status.

 See https://github.com/w3c/csswg-drafts/issues/9398

 Gates the durability() method on a storage bucket and the property in
 the options struct.

 Gates the locks() method on a storage bucket.

 Feature for updating SVG presentation attribute style eagerly. This is
 a kill switch in case we encounter issues with this optimization.

 Enables loading of external SVG resource documents for the 'clip-path',
 'fill', 'stroke' and 'marker-*' properties.

 Feature for optimizing SVG transform changes. This is a kill switch in
 case we encounter issues with these optimizations.

 This is used for emoji variation selectors support in system
 fallback matching. This is a workaround solution that helps to
 avoid incorrect font matching due to lack of cmap format 14
 subtable in system emoji fonts on various platforms.
 This should be eventually removed when the custom emoji font
 is shipped with Chrome or when system emoji fonts will have
 cmap format 14 subtable.

 For unit tests.
 This is for testing copied_from_base_feature_if.
 This is set in base/test/test_suite.cc.

 For unit tests.

 For unit tests.

 For unit tests.

 For unit tests.

 For unit tests.

 For unit tests.

 crbug.com/325517313

 Ensures correct segment boundary for floating elements
 so that the selection does not get expanded for them.
 See https://crbug.com/40711666.

 New implementation of text-size-adjust that applies during style rather
 than via the text autosizer. This also includes changes such as
 directly using percentage values without heuristics, and fully
 disabling automatic size adjustments when non-auto values are used.
 See: https://crbug.com/340389272.

 Support for the timeline-scope property.

 https://drafts.csswg.org/scroll-animations-1/#timeline-scope

 This feature allows touch dragging and a context menu to occur
 simultaneously, with the assumption that the menu is non-modal.  Without
 this feature, a long-press touch gesture can start either a drag or a
 context-menu in Blink, not both (more precisely, a context menu is shown
 only if a drag cannot be started).

 This feature makes touch dragging to occur at the short-press gesture,
 which occurs right before the long-press gesture.  This feature assumes
 that TouchDragAndContextMenu is enabled.

 Many websites disable mouse support when touch APIs are available.  We'd
 like to enable this always but can't until more websites fix this bug.
 Chromium sets this conditionally (eg. based on the presence of a
 touchscreen) in ApplyWebPreferences. "Touch events" themselves are always
 enabled since they're a feature always supported by Chrome.

 Set to reflect the kTouchTextEditingRedesign feature.

 This is conditionally set if the platform supports translation.

 Unblock queued blocking touchmove after the main thread handles the
 touchstart and the first touchmove and they didn't call
 preventDefault(), instead of waiting for the browser to send
 touchscrollstarted.

 Skip CSS animation events on unowned CSS animations:
 https://drafts.csswg.org/css-animations-2/#event-dispatch

 This is a reverse OT used for a phased deprecation, on desktop
 https://crbug.com/1071424

 Enables using policy-controlled feature "usb-unrestricted" to allow
 isolated context to access protected USB interface classes and to
 bypass the USB blocklist.

 Android currently uses low-quality interpolation, while other platforms
 default to medium-quality. This flag is for experimenting with changing
 the value on Android. See: https://crbug.com/374315986.

 Makes navigation APIs to use focus node for caret navigation instead
 of selection start.
 https://crbug.com/40658856

 crbug.com/356190942

 Whether a video element should automatically play fullscreen unless
 'playsinline' is set.

 This is a kill switch for a fix where viewport changes did not update
 the text autosizer, see: crbug.com/359910401.

 If enabled, ViewTransition API is supported for navigations including
 cross-document transitions.
 See https://drafts.csswg.org/css-view-transitions-1/.

 https://chromestatus.com/feature/5089552511533056

 The "WakeLock" feature was originally implied_by "ScreenWakeLock" and
 "SystemWakeLock". The former was removed after being promoted to
 stable, but we need to keep this feature around for code and IDLs that
 should work with both screen and system wake locks.

 When enabled, this will issue a warning to the console any time
 rendering is forced withing content-visibility subtrees (both
 content-visibility: auto and content-visibility: hidden).

 This is not going into origin trial, "origin_trial_feature_name" is
 required for using the "implied_by" behaviour.

 This flag enables the Manifest parser to handle URL Handlers.
 Also enabled when blink::features::kWebAppEnableUrlHandlers is
 overridden on the command line (or via chrome://flags).

 WebAssembly JS Promise Integration,
 https://github.com/WebAssembly/js-promise-integration/blob/main/proposals/js-promise-integration

 WebAuth is disabled on Android versions prior to N (7.0) due to lack of
 supporting APIs, see runtime_features.cc.

 When enabled adds the authenticator attachment used for registration and
 authentication to the public key credential response.

 Prototyping https://github.com/w3c/webauthn/issues/2144

 https://w3c.github.io/webauthn/#dom-publickeycredentialcreationoptions-attestationformats

 Enables the PublicKeyCredential.getClientCapabilities() static method.
 https://w3c.github.io/webauthn/#sctn-getClientCapabilities

 Methods for deserializing WebAuthn requests from JSON/serializing
 responses into JSON.
 https://w3c.github.io/webauthn/#dom-publickeycredential-tojson
 https://w3c.github.io/webauthn/#sctn-parseCreationOptionsFromJSON
 https://w3c.github.io/webauthn/#sctn-parseRequestOptionsFromJSON

 https://w3c.github.io/webauthn/#prf-extension

 https://w3c.github.io/webauthn/#sctn-supplemental-public-keys-extension

 WebBluetooth is enabled by default on Android, ChromeOS, macOS and
 Windows.

 Draft WebGL extensions are deliberately not enabled by experimental web
 platform features.

 WebGPU developer features are deliberately not enabled by experimental
 web platform features.

 WebGPU experimental features are meant for features that would
 eventually land in the WebGPU spec.

 Using subgroup related features in WebGPU.
 https://chromestatus.com/feature/5126409856221184

 It is only enabled in extension environment for now.

 Kill switch for making BigInt handling in WebIDL use ToBigInt.

 https://wicg.github.io/web-preferences-api/

 WebShare is enabled by default on Android.

 Note: enabling this without setting WebTransportCongestionControl to
 either BBRv1 or BBRv2 will produce poor bandwidth estimates.

 It is only enabled in extension environment for now.

 If enabled, window.default[Ss]tatus will be supported. This is disabled
 by default, and is here to allow this behavior to be re-enabled via Finch
 in case of problems. This flag should be removed by Q1 2023, assuming
 no problems are encountered.

 Flag guard for change to XML parser to merge adjacent CDATA sections.
 See https://crrev.com/c/4790343.

 If enabled, the getDisplayMedia() family of APIs will ask for NV12
 frames, which should trigger a zero-copy path in the tab capture code.