Expose UseCounter::Feature enum out of blink as WebFeature

third_party/WebKit/Source/core/frame/UseCounter.h

Index: third_party/WebKit/Source/core/frame/UseCounter.h
diff --git a/third_party/WebKit/Source/core/frame/UseCounter.h b/third_party/WebKit/Source/core/frame/UseCounter.h
index 8969728dc9056d19ea38d2a85915c7b1d66e6804..f122aeac8a8bea065ee605e38c5c3f26fd0205d2 100644
--- a/third_party/WebKit/Source/core/frame/UseCounter.h
+++ b/third_party/WebKit/Source/core/frame/UseCounter.h
@@ -35,6 +35,7 @@
 #include "platform/wtf/BitVector.h"
 #include "platform/wtf/Noncopyable.h"
 #include "platform/wtf/text/WTFString.h"
+#include "public/platform/WebFeature.h"
 #include "v8/include/v8.h"
 
 namespace blink {
@@ -78,1555 +79,7 @@ class CORE_EXPORT UseCounter {
   UseCounter(Context = kDefaultContext);
 
   enum Feature : uint32_t {
-    // Do not change assigned numbers of existing items: add new features
-    // to the end of the list.
-    kOBSOLETE_PageDestruction = 0,
-    kWorkerStart = 4,
-    kSharedWorkerStart = 5,
-    kUnprefixedIndexedDB = 9,
-    kOpenWebDatabase = 10,
-    kUnprefixedRequestAnimationFrame = 13,
-    kPrefixedRequestAnimationFrame = 14,
-    kContentSecurityPolicy = 15,
-    kContentSecurityPolicyReportOnly = 16,
-    kPrefixedTransitionEndEvent = 18,
-    kUnprefixedTransitionEndEvent = 19,
-    kPrefixedAndUnprefixedTransitionEndEvent = 20,
-    kAutoFocusAttribute = 21,
-    kDataListElement = 23,
-    kFormAttribute = 24,
-    kIncrementalAttribute = 25,
-    kInputTypeColor = 26,
-    kInputTypeDate = 27,
-    kInputTypeDateTimeFallback = 29,
-    kInputTypeDateTimeLocal = 30,
-    kInputTypeEmail = 31,
-    kInputTypeMonth = 32,
-    kInputTypeNumber = 33,
-    kInputTypeRange = 34,
-    kInputTypeSearch = 35,
-    kInputTypeTel = 36,
-    kInputTypeTime = 37,
-    kInputTypeURL = 38,
-    kInputTypeWeek = 39,
-    kInputTypeWeekFallback = 40,
-    kListAttribute = 41,
-    kMaxAttribute = 42,
-    kMinAttribute = 43,
-    kPatternAttribute = 44,
-    kPlaceholderAttribute = 45,
-    kPrefixedDirectoryAttribute = 47,
-    kRequiredAttribute = 49,
-    kStepAttribute = 51,
-    kPageVisits = 52,
-    kHTMLMarqueeElement = 53,
-    kReflection = 55,
-    kPrefixedStorageInfo = 57,
-    kDeprecatedFlexboxWebContent = 61,
-    kDeprecatedFlexboxChrome = 62,
-    kDeprecatedFlexboxChromeExtension = 63,
-    kUnprefixedPerformanceTimeline = 65,
-    kUnprefixedUserTiming = 67,
-    kWindowEvent = 69,
-    kContentSecurityPolicyWithBaseElement = 70,
-    kDocumentClear = 74,
-    kXMLDocument = 77,
-    kXSLProcessingInstruction = 78,
-    kXSLTProcessor = 79,
-    kSVGSwitchElement = 80,
-    kDocumentAll = 83,
-    kFormElement = 84,
-    kDemotedFormElement = 85,
-    kSVGAnimationElement = 90,
-    kLineClamp = 96,
-    kSubFrameBeforeUnloadRegistered = 97,
-    kSubFrameBeforeUnloadFired = 98,
-    kConsoleMarkTimeline = 102,
-    kDocumentCreateAttribute = 111,
-    kDocumentCreateAttributeNS = 112,
-    kDocumentXMLEncoding = 115,    // Removed from DOM4.
-    kDocumentXMLStandalone = 116,  // Removed from DOM4.
-    kDocumentXMLVersion = 117,     // Removed from DOM4.
-    kNavigatorProductSub = 123,
-    kNavigatorVendor = 124,
-    kNavigatorVendorSub = 125,
-    kPrefixedAnimationEndEvent = 128,
-    kUnprefixedAnimationEndEvent = 129,
-    kPrefixedAndUnprefixedAnimationEndEvent = 130,
-    kPrefixedAnimationStartEvent = 131,
-    kUnprefixedAnimationStartEvent = 132,
-    kPrefixedAndUnprefixedAnimationStartEvent = 133,
-    kPrefixedAnimationIterationEvent = 134,
-    kUnprefixedAnimationIterationEvent = 135,
-    kPrefixedAndUnprefixedAnimationIterationEvent = 136,
-    kEventReturnValue = 137,  // Legacy IE extension.
-    kSVGSVGElement = 138,
-    kDOMSubtreeModifiedEvent = 143,
-    kDOMNodeInsertedEvent = 144,
-    kDOMNodeRemovedEvent = 145,
-    kDOMNodeRemovedFromDocumentEvent = 146,
-    kDOMNodeInsertedIntoDocumentEvent = 147,
-    kDOMCharacterDataModifiedEvent = 148,
-    kDocumentAllLegacyCall = 150,
-    kGetMatchedCSSRules = 155,
-    kPrefixedAudioDecodedByteCount = 164,
-    kPrefixedVideoDecodedByteCount = 165,
-    kPrefixedVideoSupportsFullscreen = 166,
-    kPrefixedVideoDisplayingFullscreen = 167,
-    kPrefixedVideoEnterFullscreen = 168,
-    kPrefixedVideoExitFullscreen = 169,
-    kPrefixedVideoEnterFullScreen = 170,
-    kPrefixedVideoExitFullScreen = 171,
-    kPrefixedVideoDecodedFrameCount = 172,
-    kPrefixedVideoDroppedFrameCount = 173,
-    kPrefixedElementRequestFullscreen = 176,
-    kPrefixedElementRequestFullScreen = 177,
-    kBarPropLocationbar = 178,
-    kBarPropMenubar = 179,
-    kBarPropPersonalbar = 180,
-    kBarPropScrollbars = 181,
-    kBarPropStatusbar = 182,
-    kBarPropToolbar = 183,
-    kInputTypeEmailMultiple = 184,
-    kInputTypeEmailMaxLength = 185,
-    kInputTypeEmailMultipleMaxLength = 186,
-    kInputTypeText = 190,
-    kInputTypeTextMaxLength = 191,
-    kInputTypePassword = 192,
-    kInputTypePasswordMaxLength = 193,
-    kPrefixedPageVisibility = 196,
-    kDocumentBeforeUnloadRegistered = 200,
-    kDocumentBeforeUnloadFired = 201,
-    kDocumentUnloadRegistered = 202,
-    kDocumentUnloadFired = 203,
-    kSVGLocatableNearestViewportElement = 204,
-    kSVGLocatableFarthestViewportElement = 205,
-    kSVGPointMatrixTransform = 209,
-    kDOMFocusInOutEvent = 211,
-    kFileGetLastModifiedDate = 212,
-    kHTMLElementInnerText = 213,
-    kHTMLElementOuterText = 214,
-    kReplaceDocumentViaJavaScriptURL = 215,
-    kElementPrefixedMatchesSelector = 217,
-    kCSSStyleSheetRules = 219,
-    kCSSStyleSheetAddRule = 220,
-    kCSSStyleSheetRemoveRule = 221,
-    // The above items are available in M33 branch.
-
-    kInitMessageEvent = 222,
-    kPrefixedDevicePixelRatioMediaFeature = 233,
-    kPrefixedMaxDevicePixelRatioMediaFeature = 234,
-    kPrefixedMinDevicePixelRatioMediaFeature = 235,
-    kPrefixedTransform3dMediaFeature = 237,
-    kPrefixedStorageQuota = 240,
-    kResetReferrerPolicy = 243,
-    // Case-insensitivity dropped from specification.
-    kCaseInsensitiveAttrSelectorMatch = 244,
-    kFormNameAccessForImageElement = 246,
-    kFormNameAccessForPastNamesMap = 247,
-    kFormAssociationByParser = 248,
-    kSVGSVGElementInDocument = 250,
-    kSVGDocumentRootElement = 251,
-    kWorkerSubjectToCSP = 257,
-    kWorkerAllowedByChildBlockedByScript = 258,
-    kDeprecatedWebKitGradient = 260,
-    kDeprecatedWebKitLinearGradient = 261,
-    kDeprecatedWebKitRepeatingLinearGradient = 262,
-    kDeprecatedWebKitRadialGradient = 263,
-    kDeprecatedWebKitRepeatingRadialGradient = 264,
-    // The above items are available in M34 branch.
-
-    kTextAutosizing = 274,
-    kHTMLAnchorElementPingAttribute = 276,
-    kSVGClassName = 279,
-    kHTMLMediaElementSeekToFragmentStart = 281,
-    kHTMLMediaElementPauseAtFragmentEnd = 282,
-    kPrefixedWindowURL = 283,
-    kWindowOrientation = 285,
-    kDocumentCaptureEvents = 287,
-    kDocumentReleaseEvents = 288,
-    kWindowCaptureEvents = 289,
-    kWindowReleaseEvents = 290,
-    kDocumentXPathCreateExpression = 295,
-    kDocumentXPathCreateNSResolver = 296,
-    kDocumentXPathEvaluate = 297,
-    kAnimationConstructorKeyframeListEffectObjectTiming = 300,
-    kAnimationConstructorKeyframeListEffectNoTiming = 302,
-    kPrefixedCancelAnimationFrame = 304,
-    kNamedNodeMapGetNamedItem = 306,
-    kNamedNodeMapSetNamedItem = 307,
-    kNamedNodeMapRemoveNamedItem = 308,
-    kNamedNodeMapItem = 309,
-    kNamedNodeMapGetNamedItemNS = 310,
-    kNamedNodeMapSetNamedItemNS = 311,
-    kNamedNodeMapRemoveNamedItemNS = 312,
-    kPrefixedDocumentIsFullscreen = 318,
-    kPrefixedDocumentCurrentFullScreenElement = 320,
-    kPrefixedDocumentCancelFullScreen = 321,
-    kPrefixedDocumentFullscreenEnabled = 322,
-    kPrefixedDocumentFullscreenElement = 323,
-    kPrefixedDocumentExitFullscreen = 324,
-    // The above items are available in M35 branch.
-
-    kSVGForeignObjectElement = 325,
-    kSelectionSetPosition = 327,
-    kAnimationFinishEvent = 328,
-    kSVGSVGElementInXMLDocument = 329,
-    kEventSrcElement = 343,
-    kEventCancelBubble = 344,
-    kEventPath = 345,
-    kNodeIteratorDetach = 347,
-    kEventGetReturnValueTrue = 350,
-    kEventGetReturnValueFalse = 351,
-    kEventSetReturnValueTrue = 352,
-    kEventSetReturnValueFalse = 353,
-    kWindowOffscreenBuffering = 356,
-    kWindowDefaultStatus = 357,
-    kWindowDefaultstatus = 358,
-    kPrefixedTransitionEventConstructor = 361,
-    kPrefixedMutationObserverConstructor = 362,
-    kNotificationPermission = 371,
-    kRangeDetach = 372,
-    kPrefixedFileRelativePath = 386,
-    kDocumentCaretRangeFromPoint = 387,
-    kElementScrollIntoViewIfNeeded = 389,
-    kRangeExpand = 393,
-    kHTMLImageElementX = 396,
-    kHTMLImageElementY = 397,
-    kSelectionBaseNode = 400,
-    kSelectionBaseOffset = 401,
-    kSelectionExtentNode = 402,
-    kSelectionExtentOffset = 403,
-    kSelectionType = 404,
-    kSelectionModify = 405,
-    kSelectionSetBaseAndExtent = 406,
-    kSelectionEmpty = 407,
-    kVTTCue = 409,
-    kVTTCueRender = 410,
-    kVTTCueRenderVertical = 411,
-    kVTTCueRenderSnapToLinesFalse = 412,
-    kVTTCueRenderLineNotAuto = 413,
-    kVTTCueRenderPositionNot50 = 414,
-    kVTTCueRenderSizeNot100 = 415,
-    kVTTCueRenderAlignNotCenter = 416,
-    // The above items are available in M36 branch.
-
-    kElementRequestPointerLock = 417,
-    kVTTCueRenderRtl = 418,
-    kPostMessageFromSecureToInsecure = 419,
-    kPostMessageFromInsecureToSecure = 420,
-    kDocumentExitPointerLock = 421,
-    kDocumentPointerLockElement = 422,
-    kPrefixedCursorZoomIn = 424,
-    kPrefixedCursorZoomOut = 425,
-    kTextEncoderConstructor = 429,
-    kTextEncoderEncode = 430,
-    kTextDecoderConstructor = 431,
-    kTextDecoderDecode = 432,
-    kFocusInOutEvent = 433,
-    kMouseEventMovementX = 434,
-    kMouseEventMovementY = 435,
-    kDocumentFonts = 440,
-    kMixedContentFormsSubmitted = 441,
-    kFormsSubmitted = 442,
-    kHTMLImports = 455,
-    kElementCreateShadowRoot = 456,
-    kDocumentRegisterElement = 457,
-    kEditingAppleInterchangeNewline = 458,
-    kEditingAppleConvertedSpace = 459,
-    kEditingApplePasteAsQuotation = 460,
-    kEditingAppleStyleSpanClass = 461,
-    kHTMLImportsAsyncAttribute = 463,
-    kXMLHttpRequestSynchronous = 465,
-    kCSSSelectorPseudoUnresolved = 466,
-    kCSSSelectorPseudoShadow = 467,
-    kCSSSelectorPseudoContent = 468,
-    kCSSSelectorPseudoHost = 469,
-    kCSSSelectorPseudoHostContext = 470,
-    kCSSDeepCombinator = 471,
-    // The above items are available in M37 branch.
-
-    kUseAsm = 473,
-    kDOMWindowOpen = 475,
-    kDOMWindowOpenFeatures = 476,
-    kAspectRatioFlexItem = 479,
-    kDetailsElement = 480,
-    kDialogElement = 481,
-    kMapElement = 482,
-    kMeterElement = 483,
-    kProgressElement = 484,
-    kWheelEventWheelDeltaX = 491,
-    kWheelEventWheelDeltaY = 492,
-    kWheelEventWheelDelta = 493,
-    kSendBeacon = 494,
-    kSendBeaconQuotaExceeded = 495,
-    kSVGSMILElementInDocument = 501,
-    kMouseEventOffsetX = 502,
-    kMouseEventOffsetY = 503,
-    kMouseEventX = 504,
-    kMouseEventY = 505,
-    kMouseEventFromElement = 506,
-    kMouseEventToElement = 507,
-    kRequestFileSystem = 508,
-    kRequestFileSystemWorker = 509,
-    kRequestFileSystemSyncWorker = 510,
-    kSVGStyleElementTitle = 519,
-    kPictureSourceSrc = 520,
-    // The above items are available in M38 branch.
-
-    kPicture = 521,
-    kSizes = 522,
-    kSrcsetXDescriptor = 523,
-    kSrcsetWDescriptor = 524,
-    kSelectionContainsNode = 525,
-    kXMLExternalResourceLoad = 529,
-    kMixedContentPrivateHostnameInPublicHostname = 530,
-    kLegacyProtocolEmbeddedAsSubresource = 531,
-    kRequestedSubresourceWithEmbeddedCredentials = 532,
-    kNotificationCreated = 533,
-    kNotificationClosed = 534,
-    kNotificationPermissionRequested = 535,
-    kConsoleTimeline = 538,
-    kConsoleTimelineEnd = 539,
-    kSRIElementWithMatchingIntegrityAttribute = 540,
-    kSRIElementWithNonMatchingIntegrityAttribute = 541,
-    kSRIElementWithUnparsableIntegrityAttribute = 542,
-    kV8Animation_StartTime_AttributeGetter = 545,
-    kV8Animation_StartTime_AttributeSetter = 546,
-    kV8Animation_CurrentTime_AttributeGetter = 547,
-    kV8Animation_CurrentTime_AttributeSetter = 548,
-    kV8Animation_PlaybackRate_AttributeGetter = 549,
-    kV8Animation_PlaybackRate_AttributeSetter = 550,
-    kV8Animation_PlayState_AttributeGetter = 551,
-    kV8Animation_Finish_Method = 552,
-    kV8Animation_Play_Method = 553,
-    kV8Animation_Pause_Method = 554,
-    kV8Animation_Reverse_Method = 555,
-    // The above items are available in M39 branch.
-
-    kBreakIterator = 556,
-    kScreenOrientationAngle = 557,
-    kScreenOrientationType = 558,
-    kScreenOrientationLock = 559,
-    kScreenOrientationUnlock = 560,
-    kGeolocationSecureOrigin = 561,
-    kGeolocationInsecureOrigin = 562,
-    kNotificationSecureOrigin = 563,
-    kNotificationInsecureOrigin = 564,
-    kNotificationShowEvent = 565,
-    kSVGTransformListConsolidate = 569,
-    kSVGAnimatedTransformListBaseVal = 570,
-    kQuotedAnimationName = 571,
-    kQuotedKeyframesRule = 572,
-    kSrcsetDroppedCandidate = 573,
-    kWindowPostMessage = 574,
-    kRenderRuby = 576,
-    kScriptElementWithInvalidTypeHasSrc = 578,
-    kXMLHttpRequestSynchronousInNonWorkerOutsideBeforeUnload = 581,
-    kCSSSelectorPseudoScrollbar = 582,
-    kCSSSelectorPseudoScrollbarButton = 583,
-    kCSSSelectorPseudoScrollbarThumb = 584,
-    kCSSSelectorPseudoScrollbarTrack = 585,
-    kCSSSelectorPseudoScrollbarTrackPiece = 586,
-    kLangAttribute = 587,
-    kLangAttributeOnHTML = 588,
-    kLangAttributeOnBody = 589,
-    kLangAttributeDoesNotMatchToUILocale = 590,
-    kInputTypeSubmit = 591,
-    kInputTypeSubmitWithValue = 592,
-    // The above items are available in M40 branch.
-
-    kSetReferrerPolicy = 593,
-    kTextWholeText = 599,
-    kNotificationCloseEvent = 603,
-    kStyleMedia = 606,
-    kStyleMediaType = 607,
-    kStyleMediaMatchMedium = 608,
-    kMixedContentPresent = 609,
-    kMixedContentBlockable = 610,
-    kMixedContentAudio = 611,
-    kMixedContentDownload = 612,
-    kMixedContentFavicon = 613,
-    kMixedContentImage = 614,
-    kMixedContentInternal = 615,
-    kMixedContentPlugin = 616,
-    kMixedContentPrefetch = 617,
-    kMixedContentVideo = 618,
-    kCSSSelectorPseudoFullScreenAncestor = 628,
-    kCSSSelectorPseudoFullScreen = 629,
-    kWebKitCSSMatrix = 630,
-    kAudioContextCreateAnalyser = 631,
-    kAudioContextCreateBiquadFilter = 632,
-    kAudioContextCreateBufferSource = 633,
-    kAudioContextCreateChannelMerger = 634,
-    kAudioContextCreateChannelSplitter = 635,
-    kAudioContextCreateConvolver = 636,
-    kAudioContextCreateDelay = 637,
-    kAudioContextCreateDynamicsCompressor = 638,
-    kAudioContextCreateGain = 639,
-    kAudioContextCreateMediaElementSource = 640,
-    kAudioContextCreateMediaStreamDestination = 641,
-    kAudioContextCreateMediaStreamSource = 642,
-    kAudioContextCreateOscillator = 643,
-    kAudioContextCreatePeriodicWave = 645,
-    kAudioContextCreateScriptProcessor = 646,
-    kAudioContextCreateStereoPanner = 647,
-    kAudioContextCreateWaveShaper = 648,
-    kAudioContextDecodeAudioData = 649,
-    kAudioContextResume = 650,
-    kAudioContextSuspend = 651,
-    kMixedContentInNonHTTPSFrameThatRestrictsMixedContent = 661,
-    kMixedContentInSecureFrameThatDoesNotRestrictMixedContent = 662,
-    kMixedContentWebSocket = 663,
-    kSyntheticKeyframesInCompositedCSSAnimation = 664,
-    kMixedContentFormPresent = 665,
-    kGetUserMediaInsecureOrigin = 666,
-    kGetUserMediaSecureOrigin = 667,
-    // The above items are available in M41 branch.
-
-    kDeviceMotionInsecureOrigin = 668,
-    kDeviceMotionSecureOrigin = 669,
-    kDeviceOrientationInsecureOrigin = 670,
-    kDeviceOrientationSecureOrigin = 671,
-    kSandboxViaIFrame = 672,
-    kSandboxViaCSP = 673,
-    kBlockedSniffingImageToScript = 674,
-    kFetch = 675,
-    kFetchBodyStream = 676,
-    kXMLHttpRequestAsynchronous = 677,
-    kWhiteSpacePreFromXMLSpace = 679,
-    kWhiteSpaceNowrapFromXMLSpace = 680,
-    kSVGSVGElementForceRedraw = 685,
-    kSVGSVGElementSuspendRedraw = 686,
-    kSVGSVGElementUnsuspendRedraw = 687,
-    kSVGSVGElementUnsuspendRedrawAll = 688,
-    kAudioContextClose = 689,
-    kCSSZoomNotEqualToOne = 691,
-    // The above items are available in M42 branch.
-
-    kClientRectListItem = 694,
-    kWindowClientInformation = 695,
-    kWindowFind = 696,
-    kWindowScreenLeft = 697,
-    kWindowScreenTop = 698,
-    kV8Animation_Cancel_Method = 699,
-    kV8Animation_Onfinish_AttributeGetter = 700,
-    kV8Animation_Onfinish_AttributeSetter = 701,
-    kV8Window_WebKitAnimationEvent_ConstructorGetter = 707,
-    kCryptoGetRandomValues = 710,
-    kSubtleCryptoEncrypt = 711,
-    kSubtleCryptoDecrypt = 712,
-    kSubtleCryptoSign = 713,
-    kSubtleCryptoVerify = 714,
-    kSubtleCryptoDigest = 715,
-    kSubtleCryptoGenerateKey = 716,
-    kSubtleCryptoImportKey = 717,
-    kSubtleCryptoExportKey = 718,
-    kSubtleCryptoDeriveBits = 719,
-    kSubtleCryptoDeriveKey = 720,
-    kSubtleCryptoWrapKey = 721,
-    kSubtleCryptoUnwrapKey = 722,
-    kCryptoAlgorithmAesCbc = 723,
-    kCryptoAlgorithmHmac = 724,
-    kCryptoAlgorithmRsaSsaPkcs1v1_5 = 725,
-    kCryptoAlgorithmSha1 = 726,
-    kCryptoAlgorithmSha256 = 727,
-    kCryptoAlgorithmSha384 = 728,
-    kCryptoAlgorithmSha512 = 729,
-    kCryptoAlgorithmAesGcm = 730,
-    kCryptoAlgorithmRsaOaep = 731,
-    kCryptoAlgorithmAesCtr = 732,
-    kCryptoAlgorithmAesKw = 733,
-    kCryptoAlgorithmRsaPss = 734,
-    kCryptoAlgorithmEcdsa = 735,
-    kCryptoAlgorithmEcdh = 736,
-    kCryptoAlgorithmHkdf = 737,
-    kCryptoAlgorithmPbkdf2 = 738,
-    kDocumentSetDomain = 739,
-    kUpgradeInsecureRequestsEnabled = 740,
-    kUpgradeInsecureRequestsUpgradedRequest = 741,
-    kDocumentDesignMode = 742,
-    kGlobalCacheStorage = 743,
-    kNetInfo = 744,
-    kBackgroundSync = 745,
-    kLegacyConst = 748,
-    kV8Permissions_Query_Method = 750,
-    // The above items are available in M43 branch.
-
-    kV8HTMLInputElement_Autocapitalize_AttributeGetter = 754,
-    kV8HTMLInputElement_Autocapitalize_AttributeSetter = 755,
-    kV8HTMLTextAreaElement_Autocapitalize_AttributeGetter = 756,
-    kV8HTMLTextAreaElement_Autocapitalize_AttributeSetter = 757,
-    kSVGHrefBaseVal = 758,
-    kSVGHrefAnimVal = 759,
-    kV8CSSRuleList_Item_Method = 760,
-    kV8MediaList_Item_Method = 761,
-    kV8StyleSheetList_Item_Method = 762,
-    kStyleSheetListAnonymousNamedGetter = 763,
-    kAutocapitalizeAttribute = 764,
-    kFullscreenSecureOrigin = 765,
-    kFullscreenInsecureOrigin = 766,
-    kDialogInSandboxedContext = 767,
-    kSVGSMILAnimationInImageRegardlessOfCache = 768,
-    kPerformanceFrameTiming = 772,
-    kV8Element_Animate_Method = 773,
-    // The above items are available in M44 branch.
-
-    kV8SVGSVGElement_GetElementById_Method = 778,
-    kElementCreateShadowRootMultiple = 779,
-    kV8MessageChannel_Constructor = 780,
-    kV8MessagePort_PostMessage_Method = 781,
-    kV8MessagePort_Start_Method = 782,
-    kV8MessagePort_Close_Method = 783,
-    kMessagePortsTransferred = 784,
-    kCSSKeyframesRuleAnonymousIndexedGetter = 785,
-    kV8Screen_AvailLeft_AttributeGetter = 786,
-    kV8Screen_AvailTop_AttributeGetter = 787,
-    kV8SVGFEConvolveMatrixElement_PreserveAlpha_AttributeGetter = 791,
-    kV8SVGStyleElement_Disabled_AttributeGetter = 798,
-    kV8SVGStyleElement_Disabled_AttributeSetter = 799,
-    kInputTypeFileSecureOrigin = 801,
-    kInputTypeFileInsecureOrigin = 802,
-    kElementAttachShadow = 804,
-    kV8SecurityPolicyViolationEvent_DocumentURI_AttributeGetter = 806,
-    kV8SecurityPolicyViolationEvent_BlockedURI_AttributeGetter = 807,
-    kV8SecurityPolicyViolationEvent_StatusCode_AttributeGetter = 808,
-    kHTMLLinkElementDisabled = 809,
-    kV8HTMLLinkElement_Disabled_AttributeGetter = 810,
-    kV8HTMLLinkElement_Disabled_AttributeSetter = 811,
-    kV8HTMLStyleElement_Disabled_AttributeGetter = 812,
-    kV8HTMLStyleElement_Disabled_AttributeSetter = 813,
-    kV8DOMError_Constructor = 816,
-    kV8DOMError_Name_AttributeGetter = 817,
-    kV8DOMError_Message_AttributeGetter = 818,
-    kTextInputFired = 830,
-    kV8TextEvent_Data_AttributeGetter = 831,
-    kV8TextEvent_InitTextEvent_Method = 832,
-    kClientHintsDPR = 835,
-    kClientHintsResourceWidth = 836,
-    kClientHintsViewportWidth = 837,
-    kSRIElementIntegrityAttributeButIneligible = 838,
-    kFormDataAppendNull = 843,
-    kNonHTMLElementSetAttributeNodeFromHTMLDocumentNameNotLowercase = 845,
-    kNavigatorVibrate = 850,
-    kNavigatorVibrateSubFrame = 851,
-    kV8XPathEvaluator_Constructor = 853,
-    kV8XPathEvaluator_CreateExpression_Method = 854,
-    kV8XPathEvaluator_CreateNSResolver_Method = 855,
-    kV8XPathEvaluator_Evaluate_Method = 856,
-    kRequestMIDIAccess = 857,
-    kV8MouseEvent_LayerX_AttributeGetter = 858,
-    kV8MouseEvent_LayerY_AttributeGetter = 859,
-    kInnerTextWithShadowTree = 860,
-    kSelectionToStringWithShadowTree = 861,
-    kWindowFindWithShadowTree = 862,
-    kV8CompositionEvent_InitCompositionEvent_Method = 863,
-    kV8CustomEvent_InitCustomEvent_Method = 864,
-    kV8DeviceMotionEvent_InitDeviceMotionEvent_Method = 865,
-    kV8DeviceOrientationEvent_InitDeviceOrientationEvent_Method = 866,
-    kV8Event_InitEvent_Method = 867,
-    kV8KeyboardEvent_InitKeyboardEvent_Method = 868,
-    kV8MouseEvent_InitMouseEvent_Method = 869,
-    kV8MutationEvent_InitMutationEvent_Method = 870,
-    kV8StorageEvent_InitStorageEvent_Method = 871,
-    kV8UIEvent_InitUIEvent_Method = 873,
-    kV8Document_CreateTouch_Method = 874,
-    kRequestFileSystemNonWebbyOrigin = 876,
-    kV8MemoryInfo_TotalJSHeapSize_AttributeGetter = 879,
-    kV8MemoryInfo_UsedJSHeapSize_AttributeGetter = 880,
-    kV8MemoryInfo_JSHeapSizeLimit_AttributeGetter = 881,
-    kV8Performance_Timing_AttributeGetter = 882,
-    kV8Performance_Navigation_AttributeGetter = 883,
-    kV8Performance_Memory_AttributeGetter = 884,
-    kV8SharedWorker_WorkerStart_AttributeGetter = 885,
-    // The above items are available in M45 branch.
-
-    kHTMLMediaElementPreloadNone = 892,
-    kHTMLMediaElementPreloadMetadata = 893,
-    kHTMLMediaElementPreloadAuto = 894,
-    kHTMLMediaElementPreloadDefault = 895,
-    kMixedContentBlockableAllowed = 896,
-    kPseudoBeforeAfterForInputElement = 897,
-    kV8Permissions_Revoke_Method = 898,
-    kLinkRelDnsPrefetch = 899,
-    kLinkRelPreconnect = 900,
-    kLinkRelPreload = 901,
-    kLinkHeaderDnsPrefetch = 902,
-    kLinkHeaderPreconnect = 903,
-    kClientHintsMetaAcceptCH = 904,
-    kHTMLElementDeprecatedWidth = 905,
-    kClientHintsContentDPR = 906,
-    kElementAttachShadowOpen = 907,
-    kElementAttachShadowClosed = 908,
-    kAudioParamSetValueAtTime = 909,
-    kAudioParamLinearRampToValueAtTime = 910,
-    kAudioParamExponentialRampToValueAtTime = 911,
-    kAudioParamSetTargetAtTime = 912,
-    kAudioParamSetValueCurveAtTime = 913,
-    kAudioParamCancelScheduledValues = 914,
-    kV8Permissions_Request_Method = 915,
-    kLinkRelPrefetch = 917,
-    kLinkRelPrerender = 918,
-    kLinkRelNext = 919,
-    kCSSValuePrefixedMinContent = 921,
-    kCSSValuePrefixedMaxContent = 922,
-    kCSSValuePrefixedFitContent = 923,
-    kCSSValuePrefixedFillAvailable = 924,
-    kPresentationDefaultRequest = 926,
-    kPresentationAvailabilityChangeEventListener = 927,
-    kPresentationRequestConstructor = 928,
-    kPresentationRequestStart = 929,
-    kPresentationRequestReconnect = 930,
-    kPresentationRequestGetAvailability = 931,
-    kPresentationRequestConnectionAvailableEventListener = 932,
-    kPresentationConnectionTerminate = 933,
-    kPresentationConnectionSend = 934,
-    kPresentationConnectionMessageEventListener = 936,
-    kCSSAnimationsStackedNeutralKeyframe = 937,
-    kReadingCheckedInClickHandler = 938,
-    kFlexboxIntrinsicSizeAlgorithmIsDifferent = 939,
-    // The above items are available in M46 branch.
-
-    kHTMLImportsHasStyleSheets = 940,
-    kNetInfoType = 946,
-    kNetInfoDownlinkMax = 947,
-    kNetInfoOnChange = 948,
-    kNetInfoOnTypeChange = 949,
-    kV8Window_Alert_Method = 950,
-    kV8Window_Confirm_Method = 951,
-    kV8Window_Prompt_Method = 952,
-    kV8Window_Print_Method = 953,
-    kV8Window_RequestIdleCallback_Method = 954,
-    kFlexboxPercentagePaddingVertical = 955,
-    kFlexboxPercentageMarginVertical = 956,
-    kBackspaceNavigatedBack = 957,
-    kBackspaceNavigatedBackAfterFormInteraction = 958,
-    kCSPSourceWildcardWouldMatchExactHost = 959,
-    kCredentialManagerGet = 960,
-    kCredentialManagerGetMediationOptional = 961,
-    kCredentialManagerGetMediationSilent = 962,
-    kCredentialManagerStore = 963,
-    kCredentialManagerRequireUserMediation = 964,
-    // The above items are available in M47 branch.
-
-    kBlockableMixedContentInSubframeBlocked = 966,
-    kAddEventListenerThirdArgumentIsObject = 967,
-    kRemoveEventListenerThirdArgumentIsObject = 968,
-    kCSSAtRuleCharset = 969,
-    kCSSAtRuleFontFace = 970,
-    kCSSAtRuleImport = 971,
-    kCSSAtRuleKeyframes = 972,
-    kCSSAtRuleMedia = 973,
-    kCSSAtRuleNamespace = 974,
-    kCSSAtRulePage = 975,
-    kCSSAtRuleSupports = 976,
-    kCSSAtRuleViewport = 977,
-    kCSSAtRuleWebkitKeyframes = 978,
-    kV8HTMLFieldSetElement_Elements_AttributeGetter = 979,
-    kHTMLMediaElementPreloadForcedNone = 980,
-    kExternalAddSearchProvider = 981,
-    kExternalIsSearchProviderInstalled = 982,
-    kV8Permissions_RequestAll_Method = 983,
-    kDeviceOrientationAbsoluteInsecureOrigin = 987,
-    kDeviceOrientationAbsoluteSecureOrigin = 988,
-    kFontFaceConstructor = 989,
-    kServiceWorkerControlledPage = 990,
-    kMeterElementWithMeterAppearance = 993,
-    kMeterElementWithNoneAppearance = 994,
-    kSelectionAnchorNode = 997,
-    kSelectionAnchorOffset = 998,
-    kSelectionFocusNode = 999,
-    kSelectionFocusOffset = 1000,
-    kSelectionIsCollapsed = 1001,
-    kSelectionRangeCount = 1002,
-    kSelectionGetRangeAt = 1003,
-    kSelectionAddRange = 1004,
-    kSelectionRemoveAllRanges = 1005,
-    kSelectionCollapse = 1006,
-    kSelectionCollapseToStart = 1007,
-    kSelectionCollapseToEnd = 1008,
-    kSelectionExtend = 1009,
-    kSelectionSelectAllChildren = 1010,
-    kSelectionDeleteDromDocument = 1011,
-    kSelectionDOMString = 1012,
-    kInputTypeRangeVerticalAppearance = 1013,
-    // The above items are available in M48 branch.
-
-    kCSSFilterReference = 1014,
-    kCSSFilterGrayscale = 1015,
-    kCSSFilterSepia = 1016,
-    kCSSFilterSaturate = 1017,
-    kCSSFilterHueRotate = 1018,
-    kCSSFilterInvert = 1019,
-    kCSSFilterOpacity = 1020,
-    kCSSFilterBrightness = 1021,
-    kCSSFilterContrast = 1022,
-    kCSSFilterBlur = 1023,
-    kCSSFilterDropShadow = 1024,
-    kBackgroundSyncRegister = 1025,
-    kExecCommandOnInputOrTextarea = 1027,
-    kV8History_ScrollRestoration_AttributeGetter = 1028,
-    kV8History_ScrollRestoration_AttributeSetter = 1029,
-    kSVG1DOMFilter = 1030,
-    kOfflineAudioContextStartRendering = 1031,
-    kOfflineAudioContextSuspend = 1032,
-    kOfflineAudioContextResume = 1033,
-    kSVG1DOMPaintServer = 1035,
-    kSVGSVGElementFragmentSVGView = 1036,
-    kSVGSVGElementFragmentSVGViewElement = 1037,
-    kPresentationConnectionClose = 1038,
-    kSVG1DOMShape = 1039,
-    kSVG1DOMText = 1040,
-    kRTCPeerConnectionConstructorConstraints = 1041,
-    kRTCPeerConnectionConstructorCompliant = 1042,
-    kRTCPeerConnectionCreateOfferLegacyFailureCallback = 1044,
-    kRTCPeerConnectionCreateOfferLegacyConstraints = 1045,
-    kRTCPeerConnectionCreateOfferLegacyOfferOptions = 1046,
-    kRTCPeerConnectionCreateOfferLegacyCompliant = 1047,
-    kRTCPeerConnectionCreateAnswerLegacyFailureCallback = 1049,
-    kRTCPeerConnectionCreateAnswerLegacyConstraints = 1050,
-    kRTCPeerConnectionCreateAnswerLegacyCompliant = 1051,
-    kRTCPeerConnectionSetLocalDescriptionLegacyNoSuccessCallback = 1052,
-    kRTCPeerConnectionSetLocalDescriptionLegacyNoFailureCallback = 1053,
-    kRTCPeerConnectionSetLocalDescriptionLegacyCompliant = 1054,
-    kRTCPeerConnectionSetRemoteDescriptionLegacyNoSuccessCallback = 1055,
-    kRTCPeerConnectionSetRemoteDescriptionLegacyNoFailureCallback = 1056,
-    kRTCPeerConnectionSetRemoteDescriptionLegacyCompliant = 1057,
-    kRTCPeerConnectionGetStatsLegacyNonCompliant = 1058,
-    kNodeFilterIsFunction = 1059,
-    kNodeFilterIsObject = 1060,
-    kCSSSelectorInternalPseudoListBox = 1062,
-    kCSSSelectorInternalMediaControlsOverlayCastButton = 1064,
-    kCSSSelectorInternalPseudoSpatialNavigationFocus = 1065,
-    kSameOriginTextScript = 1066,
-    kSameOriginApplicationScript = 1067,
-    kSameOriginOtherScript = 1068,
-    kCrossOriginTextScript = 1069,
-    kCrossOriginApplicationScript = 1070,
-    kCrossOriginOtherScript = 1071,
-    kSVG1DOMSVGTests = 1072,
-    kDisableRemotePlaybackAttribute = 1074,
-    kV8SloppyMode = 1075,
-    kV8StrictMode = 1076,
-    kV8StrongMode = 1077,
-    kAudioNodeConnectToAudioNode = 1078,
-    kAudioNodeConnectToAudioParam = 1079,
-    kAudioNodeDisconnectFromAudioNode = 1080,
-    kAudioNodeDisconnectFromAudioParam = 1081,
-    kV8CSSFontFaceRule_Style_AttributeGetter = 1082,
-    kSelectionCollapseNull = 1083,
-    kSelectionSetBaseAndExtentNull = 1084,
-    kV8SVGSVGElement_CreateSVGNumber_Method = 1085,
-    kV8SVGSVGElement_CreateSVGLength_Method = 1086,
-    kV8SVGSVGElement_CreateSVGAngle_Method = 1087,
-    kV8SVGSVGElement_CreateSVGPoint_Method = 1088,
-    kV8SVGSVGElement_CreateSVGMatrix_Method = 1089,
-    kV8SVGSVGElement_CreateSVGRect_Method = 1090,
-    kV8SVGSVGElement_CreateSVGTransform_Method = 1091,
-    kV8SVGSVGElement_CreateSVGTransformFromMatrix_Method = 1092,
-    kFormNameAccessForNonDescendantImageElement = 1093,
-    kV8RegExpPrototypeStickyGetter = 1096,
-    kV8RegExpPrototypeToString = 1097,
-    kV8InputDeviceCapabilities_FiresTouchEvents_AttributeGetter = 1098,
-    kDataElement = 1099,
-    kTimeElement = 1100,
-    kSVG1DOMUriReference = 1101,
-    kSVG1DOMZoomAndPan = 1102,
-    kV8SVGGraphicsElement_Transform_AttributeGetter = 1103,
-    kMenuItemElement = 1104,
-    kMenuItemCloseTag = 1105,
-    kSVG1DOMMarkerElement = 1106,
-    kSVG1DOMUseElement = 1107,
-    kSVG1DOMMaskElement = 1108,
-    kV8SVGAElement_Target_AttributeGetter = 1109,
-    kV8SVGClipPathElement_ClipPathUnits_AttributeGetter = 1110,
-    kSVG1DOMFitToViewBox = 1111,
-    kSVG1DOMSVGElement = 1114,
-    kSVG1DOMImageElement = 1115,
-    kSVG1DOMForeignObjectElement = 1116,
-    kAudioContextCreateIIRFilter = 1117,
-    // The above items are available in M49 branch
-
-    kCSSSelectorPseudoSlotted = 1118,
-    kMediaDevicesEnumerateDevices = 1119,
-    kNonSecureSharedWorkerAccessedFromSecureContext = 1120,
-    kSecureSharedWorkerAccessedFromNonSecureContext = 1121,
-    kEventComposedPath = 1123,
-    kLinkHeaderPreload = 1124,
-    kMouseWheelEvent = 1125,
-    kWheelEvent = 1126,
-    kMouseWheelAndWheelEvent = 1127,
-    kBodyScrollsInAdditionToViewport = 1128,
-    kDocumentDesignModeEnabeld = 1129,
-    kContentEditableTrue = 1130,
-    kContentEditableTrueOnHTML = 1131,
-    kContentEditablePlainTextOnly = 1132,
-    kV8RegExpPrototypeUnicodeGetter = 1133,
-    kV8IntlV8Parse = 1134,
-    kV8IntlPattern = 1135,
-    kV8IntlResolved = 1136,
-    kV8PromiseChain = 1137,
-    kV8PromiseAccept = 1138,
-    kV8PromiseDefer = 1139,
-    kEventComposed = 1140,
-    kGeolocationInsecureOriginIframe = 1141,
-    kGeolocationSecureOriginIframe = 1142,
-    kRequestMIDIAccessIframe = 1143,
-    kGetUserMediaInsecureOriginIframe = 1144,
-    kGetUserMediaSecureOriginIframe = 1145,
-    kElementRequestPointerLockIframe = 1146,
-    kNotificationAPIInsecureOriginIframe = 1147,
-    kNotificationAPISecureOriginIframe = 1148,
-    kWebSocket = 1149,
-    kMediaStreamConstraintsNameValue = 1150,
-    kMediaStreamConstraintsFromDictionary = 1151,
-    kMediaStreamConstraintsConformant = 1152,
-    kCSSSelectorIndirectAdjacent = 1153,
-    kCreateImageBitmap = 1156,
-    kPresentationConnectionConnectEventListener = 1157,
-    kPresentationConnectionCloseEventListener = 1158,
-    kPresentationConnectionTerminateEventListener = 1159,
-    kDocumentCreateEventAnimationEvent = 1162,
-    kDocumentCreateEventBeforeUnloadEvent = 1166,
-    kDocumentCreateEventCompositionEvent = 1168,
-    kDocumentCreateEventDragEvent = 1169,
-    kDocumentCreateEventErrorEvent = 1170,
-    kDocumentCreateEventFocusEvent = 1171,
-    kDocumentCreateEventHashChangeEvent = 1172,
-    kDocumentCreateEventMutationEvent = 1173,
-    kDocumentCreateEventPageTransitionEvent = 1174,
-    kDocumentCreateEventPopStateEvent = 1176,
-    kDocumentCreateEventTextEvent = 1182,
-    kDocumentCreateEventTransitionEvent = 1183,
-    kDocumentCreateEventWheelEvent = 1184,
-    kDocumentCreateEventTrackEvent = 1186,
-    kDocumentCreateEventMutationEvents = 1188,
-    kDocumentCreateEventSVGEvents = 1190,
-    kDocumentCreateEventDeviceMotionEvent = 1195,
-    kDocumentCreateEventDeviceOrientationEvent = 1196,
-    kDocumentCreateEventIDBVersionChangeEvent = 1201,
-    kDocumentCreateEventStorageEvent = 1221,
-    kDocumentCreateEventWebGLContextEvent = 1224,
-    kDocumentCreateEventCloseEvent = 1227,
-    kDocumentCreateEventKeyboardEvents = 1228,
-    kHTMLMediaElement = 1229,
-    kHTMLMediaElementInDocument = 1230,
-    kHTMLMediaElementControlsAttribute = 1231,
-    kV8Animation_Oncancel_AttributeGetter = 1233,
-    kV8Animation_Oncancel_AttributeSetter = 1234,
-    kV8HTMLCommentInExternalScript = 1235,
-    kV8HTMLComment = 1236,
-    kV8SloppyModeBlockScopedFunctionRedefinition = 1237,
-    kV8ForInInitializer = 1238,
-    kV8Animation_Id_AttributeGetter = 1239,
-    kV8Animation_Id_AttributeSetter = 1240,
-    kApplicationCacheManifestSelectInsecureOrigin = 1245,
-    kApplicationCacheManifestSelectSecureOrigin = 1246,
-    kApplicationCacheAPIInsecureOrigin = 1247,
-    kApplicationCacheAPISecureOrigin = 1248,
-    // The above items are available in M50 branch
-
-    kCSSAtRuleApply = 1249,
-    kCSSSelectorPseudoAny = 1250,
-    kDocumentAllItemNoArguments = 1252,
-    kDocumentAllItemNamed = 1253,
-    kDocumentAllItemIndexed = 1254,
-    kDocumentAllItemIndexedWithNonNumber = 1255,
-    kDocumentAllLegacyCallNoArguments = 1256,
-    kDocumentAllLegacyCallNamed = 1257,
-    kDocumentAllLegacyCallIndexed = 1258,
-    kDocumentAllLegacyCallIndexedWithNonNumber = 1259,
-    kDocumentAllLegacyCallTwoArguments = 1260,
-    kHTMLLabelElementControlForNonFormAssociatedElement = 1263,
-    kHTMLMediaElementLoadNetworkEmptyNotPaused = 1265,
-    kV8Window_WebkitSpeechGrammar_ConstructorGetter = 1267,
-    kV8Window_WebkitSpeechGrammarList_ConstructorGetter = 1268,
-    kV8Window_WebkitSpeechRecognition_ConstructorGetter = 1269,
-    kV8Window_WebkitSpeechRecognitionError_ConstructorGetter = 1270,
-    kV8Window_WebkitSpeechRecognitionEvent_ConstructorGetter = 1271,
-    kV8Window_SpeechSynthesis_AttributeGetter = 1272,
-    kV8IDBFactory_WebkitGetDatabaseNames_Method = 1273,
-    kImageDocument = 1274,
-    kScriptPassesCSPDynamic = 1275,
-    kCSPWithStrictDynamic = 1277,
-    kScrollAnchored = 1278,
-    kAddEventListenerFourArguments = 1279,
-    kRemoveEventListenerFourArguments = 1280,
-    kSVGCalcModeDiscrete = 1287,
-    kSVGCalcModeLinear = 1288,
-    kSVGCalcModePaced = 1289,
-    kSVGCalcModeSpline = 1290,
-    kFormSubmissionStarted = 1291,
-    kFormValidationStarted = 1292,
-    kFormValidationAbortedSubmission = 1293,
-    kFormValidationShowedMessage = 1294,
-    kWebAnimationsEasingAsFunctionLinear = 1295,
-    kWebAnimationsEasingAsFunctionOther = 1296,
-    // The above items are available in M51 branch
-
-    kV8Document_Images_AttributeGetter = 1297,
-    kV8Document_Embeds_AttributeGetter = 1298,
-    kV8Document_Plugins_AttributeGetter = 1299,
-    kV8Document_Links_AttributeGetter = 1300,
-    kV8Document_Forms_AttributeGetter = 1301,
-    kV8Document_Scripts_AttributeGetter = 1302,
-    kV8Document_Anchors_AttributeGetter = 1303,
-    kV8Document_Applets_AttributeGetter = 1304,
-    kXMLHttpRequestCrossOriginWithCredentials = 1305,
-    kMediaStreamTrackRemote = 1306,
-    kV8Node_IsConnected_AttributeGetter = 1307,
-    kShadowRootDelegatesFocus = 1308,
-    kMixedShadowRootV0AndV1 = 1309,
-    kImageDocumentInFrame = 1310,
-    kMediaDocument = 1311,
-    kMediaDocumentInFrame = 1312,
-    kPluginDocument = 1313,
-    kPluginDocumentInFrame = 1314,
-    kSinkDocument = 1315,
-    kSinkDocumentInFrame = 1316,
-    kTextDocument = 1317,
-    kTextDocumentInFrame = 1318,
-    kViewSourceDocument = 1319,
-    kFileAPINativeLineEndings = 1320,
-    kPointerEventAttributeCount = 1321,
-    kCompositedReplication = 1322,
-    kV8DataTransferItem_WebkitGetAsEntry_Method = 1325,
-    kV8HTMLInputElement_WebkitEntries_AttributeGetter = 1326,
-    kEntry_Filesystem_AttributeGetter_IsolatedFileSystem = 1327,
-    kEntry_GetMetadata_Method_IsolatedFileSystem = 1328,
-    kEntry_MoveTo_Method_IsolatedFileSystem = 1329,
-    kEntry_CopyTo_Method_IsolatedFileSystem = 1330,
-    kEntry_Remove_Method_IsolatedFileSystem = 1331,
-    kEntry_GetParent_Method_IsolatedFileSystem = 1332,
-    kEntry_ToURL_Method_IsolatedFileSystem = 1333,
-    kDuring_Microtask_Alert = 1334,
-    kDuring_Microtask_Confirm = 1335,
-    kDuring_Microtask_Print = 1336,
-    kDuring_Microtask_Prompt = 1337,
-    kDuring_Microtask_SyncXHR = 1338,
-    kCredentialManagerGetReturnedCredential = 1342,
-    kGeolocationInsecureOriginDeprecatedNotRemoved = 1343,
-    kGeolocationInsecureOriginIframeDeprecatedNotRemoved = 1344,
-    kProgressElementWithNoneAppearance = 1345,
-    kProgressElementWithProgressBarAppearance = 1346,
-    kPointerEventAddListenerCount = 1347,
-    kCSSValueAppearanceNone = 1351,
-    kCSSValueAppearanceNotNone = 1352,
-    kCSSValueAppearanceOthers = 1353,
-    kCSSValueAppearanceButton = 1354,
-    kCSSValueAppearanceCaret = 1355,
-    kCSSValueAppearanceCheckbox = 1356,
-    kCSSValueAppearanceMenulist = 1357,
-    kCSSValueAppearanceMenulistButton = 1358,
-    kCSSValueAppearanceListbox = 1359,
-    kCSSValueAppearanceRadio = 1360,
-    kCSSValueAppearanceSearchField = 1361,
-    kCSSValueAppearanceTextField = 1362,
-    kAudioContextCreatePannerAutomated = 1363,
-    kPannerNodeSetPosition = 1364,
-    kPannerNodeSetOrientation = 1365,
-    kAudioListenerSetPosition = 1366,
-    kAudioListenerSetOrientation = 1367,
-    kIntersectionObserver_Constructor = 1368,
-    kDurableStoragePersist = 1369,
-    kDurableStoragePersisted = 1370,
-    kDurableStorageEstimate = 1371,
-    kCSSDeepCombinatorAndShadow = 1375,
-    kOpacityWithPreserve3DQuirk = 1376,
-    kCSSSelectorPseudoReadOnly = 1377,
-    kCSSSelectorPseudoReadWrite = 1378,
-    // The above items are available in M52 branch
-
-    kCSSSelectorPseudoDefined = 1383,
-    kRTCPeerConnectionAddIceCandidatePromise = 1384,
-    kRTCPeerConnectionAddIceCandidateLegacy = 1385,
-    kRTCIceCandidateDefaultSdpMLineIndex = 1386,
-    kMediaStreamConstraintsOldAndNew = 1389,
-    kV8ArrayProtectorDirtied = 1390,
-    kV8ArraySpeciesModified = 1391,
-    kV8ArrayPrototypeConstructorModified = 1392,
-    kV8ArrayInstanceProtoModified = 1393,
-    kV8ArrayInstanceConstructorModified = 1394,
-    kV8LegacyFunctionDeclaration = 1395,
-    kV8RegExpPrototypeSourceGetter = 1396,
-    kV8RegExpPrototypeOldFlagGetter = 1397,
-    kV8DecimalWithLeadingZeroInStrictMode = 1398,
-    kGetUserMediaPrefixed = 1400,
-    kGetUserMediaLegacy = 1401,
-    kGetUserMediaPromise = 1402,
-    kCSSFilterFunctionNoArguments = 1403,
-    kV8LegacyDateParser = 1404,
-    kOpenSearchInsecureOriginInsecureTarget = 1405,
-    kOpenSearchInsecureOriginSecureTarget = 1406,
-    kOpenSearchSecureOriginInsecureTarget = 1407,
-    kOpenSearchSecureOriginSecureTarget = 1408,
-    kRegisterProtocolHandlerSecureOrigin = 1409,
-    kRegisterProtocolHandlerInsecureOrigin = 1410,
-    kCrossOriginWindowAlert = 1411,
-    kCrossOriginWindowConfirm = 1412,
-    kCrossOriginWindowPrompt = 1413,
-    kCrossOriginWindowPrint = 1414,
-    kMediaStreamOnActive = 1415,
-    kMediaStreamOnInactive = 1416,
-    kAddEventListenerPassiveTrue = 1417,
-    kAddEventListenerPassiveFalse = 1418,
-    kCSPReferrerDirective = 1419,
-    kDocumentOpen = 1420,
-    kElementRequestPointerLockInShadow = 1421,
-    kShadowRootPointerLockElement = 1422,
-    kDocumentPointerLockElementInV0Shadow = 1423,
-    kTextAreaMaxLength = 1424,
-    kTextAreaMinLength = 1425,
-    kTopNavigationFromSubFrame = 1426,
-    kPrefixedElementRequestFullscreenInShadow = 1427,
-    kMediaSourceAbortRemove = 1428,
-    kMediaSourceDurationTruncatingBuffered = 1429,
-    kAudioContextCrossOriginIframe = 1430,
-    // The above items are available in M53 branch
-
-    kPointerEventSetCapture = 1431,
-    kPointerEventDispatch = 1432,
-    kMIDIMessageEventReceivedTime = 1433,
-    kSummaryElementWithDisplayBlockAuthorRule = 1434,
-    kV8MediaStream_Active_AttributeGetter = 1435,
-    kBeforeInstallPromptEvent = 1436,
-    kBeforeInstallPromptEventUserChoice = 1437,
-    kBeforeInstallPromptEventPreventDefault = 1438,
-    kBeforeInstallPromptEventPrompt = 1439,
-    kExecCommandAltersHTMLStructure = 1440,
-    kSecureContextCheckPassed = 1441,
-    kSecureContextCheckFailed = 1442,
-    kSecureContextCheckForSandboxedOriginPassed = 1443,
-    kSecureContextCheckForSandboxedOriginFailed = 1444,
-    kV8DefineGetterOrSetterWouldThrow = 1445,
-    kV8FunctionConstructorReturnedUndefined = 1446,
-    kV8BroadcastChannel_Constructor = 1447,
-    kV8BroadcastChannel_PostMessage_Method = 1448,
-    kV8BroadcastChannel_Close_Method = 1449,
-    kTouchStartFired = 1450,
-    kMouseDownFired = 1451,
-    kPointerDownFired = 1452,
-    kPointerDownFiredForTouch = 1453,
-    kPointerEventDispatchPointerDown = 1454,
-    kSVGSMILBeginOrEndEventValue = 1455,
-    kSVGSMILBeginOrEndSyncbaseValue = 1456,
-    kSVGSMILElementInsertedAfterLoad = 1457,
-    kV8VisualViewport_OffsetLeft_AttributeGetter = 1458,
-    kV8VisualViewport_OffsetTop_AttributeGetter = 1459,
-    kV8VisualViewport_PageLeft_AttributeGetter = 1460,
-    kV8VisualViewport_PageTop_AttributeGetter = 1461,
-    kV8VisualViewport_Width_AttributeGetter = 1462,
-    kV8VisualViewport_Height_AttributeGetter = 1463,
-    kV8VisualViewport_Scale_AttributeGetter = 1464,
-    kVisualViewportScrollFired = 1465,
-    kVisualViewportResizeFired = 1466,
-    kNodeGetRootNode = 1467,
-    kSlotChangeEventAddListener = 1468,
-    kCSSValueAppearanceButtonRendered = 1469,
-    kCSSValueAppearanceButtonForAnchor = 1470,
-    kCSSValueAppearanceButtonForButton = 1471,
-    kCSSValueAppearanceButtonForOtherButtons = 1472,
-    kCSSValueAppearanceTextFieldRendered = 1473,
-    kCSSValueAppearanceTextFieldForSearch = 1474,
-    kCSSValueAppearanceTextFieldForTextField = 1475,
-    kRTCPeerConnectionGetStats = 1476,
-    kSVGSMILAnimationAppliedEffect = 1477,
-    kPerformanceResourceTimingSizes = 1478,
-    kEventSourceDocument = 1479,
-    kEventSourceWorker = 1480,
-    kSingleOriginInTimingAllowOrigin = 1481,
-    kMultipleOriginsInTimingAllowOrigin = 1482,
-    kStarInTimingAllowOrigin = 1483,
-    kSVGSMILAdditiveAnimation = 1484,
-    kSendBeaconWithNonSimpleContentType = 1485,
-    kChromeLoadTimesRequestTime = 1486,
-    kChromeLoadTimesStartLoadTime = 1487,
-    kChromeLoadTimesCommitLoadTime = 1488,
-    kChromeLoadTimesFinishDocumentLoadTime = 1489,
-    kChromeLoadTimesFinishLoadTime = 1490,
-    kChromeLoadTimesFirstPaintTime = 1491,
-    kChromeLoadTimesFirstPaintAfterLoadTime = 1492,
-    kChromeLoadTimesNavigationType = 1493,
-    kChromeLoadTimesWasFetchedViaSpdy = 1494,
-    kChromeLoadTimesWasNpnNegotiated = 1495,
-    kChromeLoadTimesNpnNegotiatedProtocol = 1496,
-    kChromeLoadTimesWasAlternateProtocolAvailable = 1497,
-    kChromeLoadTimesConnectionInfo = 1498,
-    kChromeLoadTimesUnknown = 1499,
-    kSVGViewElement = 1500,
-    kWebShareShare = 1501,
-    kAuxclickAddListenerCount = 1502,
-    kHTMLCanvasElement = 1503,
-    kSVGSMILAnimationElementTiming = 1504,
-    kSVGSMILBeginEndAnimationElement = 1505,
-    kSVGSMILPausing = 1506,
-    kSVGSMILCurrentTime = 1507,
-    kHTMLBodyElementOnSelectionChangeAttribute = 1508,
-    kForeignFetchInterception = 1509,
-    kUsbGetDevices = 1519,
-    kUsbRequestDevice = 1520,
-    kUsbDeviceOpen = 1521,
-    kUsbDeviceClose = 1522,
-    kUsbDeviceSelectConfiguration = 1523,
-    kUsbDeviceClaimInterface = 1524,
-    kUsbDeviceReleaseInterface = 1525,
-    kUsbDeviceSelectAlternateInterface = 1526,
-    kUsbDeviceControlTransferIn = 1527,
-    kUsbDeviceControlTransferOut = 1528,
-    kUsbDeviceClearHalt = 1529,
-    kUsbDeviceTransferIn = 1530,
-    kUsbDeviceTransferOut = 1531,
-    kUsbDeviceIsochronousTransferIn = 1532,
-    kUsbDeviceIsochronousTransferOut = 1533,
-    kUsbDeviceReset = 1534,
-    // The above items are available in M54 branch
-
-    kPointerEnterLeaveFired = 1535,
-    kPointerOverOutFired = 1536,
-    kDraggableAttribute = 1539,
-    kCleanScriptElementWithNonce = 1540,
-    kPotentiallyInjectedScriptElementWithNonce = 1541,
-    kPendingStylesheetAddedAfterBodyStarted = 1542,
-    kUntrustedMouseDownEventDispatchedToSelect = 1543,
-    kBlockedSniffingAudioToScript = 1544,
-    kBlockedSniffingVideoToScript = 1545,
-    kBlockedSniffingCSVToScript = 1546,
-    kMetaSetCookie = 1547,
-    kMetaRefresh = 1548,
-    kMetaSetCookieWhenCSPBlocksInlineScript = 1549,
-    kMetaRefreshWhenCSPBlocksInlineScript = 1550,
-    kMiddleClickAutoscrollStart = 1551,
-    kRTCPeerConnectionCreateOfferOptionsOfferToReceive = 1553,
-    kDragAndDropScrollStart = 1554,
-    kPresentationConnectionListConnectionAvailableEventListener = 1555,
-    kWebAudioAutoplayCrossOriginIframe = 1556,
-    kVRGetDisplays = 1558,
-    kXSSAuditorBlockedScript = 1581,
-    kXSSAuditorBlockedEntirePage = 1582,
-    kXSSAuditorDisabled = 1583,
-    kXSSAuditorEnabledFilter = 1584,
-    kXSSAuditorEnabledBlock = 1585,
-    kXSSAuditorInvalid = 1586,
-    kTextInputEventOnInput = 1589,
-    kTextInputEventOnTextArea = 1590,
-    kTextInputEventOnContentEditable = 1591,
-    kTextInputEventOnNotNode = 1592,
-    kWebkitBeforeTextInsertedOnInput = 1593,
-    kWebkitBeforeTextInsertedOnTextArea = 1594,
-    kWebkitBeforeTextInsertedOnContentEditable = 1595,
-    kWebkitBeforeTextInsertedOnNotNode = 1596,
-    kWebkitEditableContentChangedOnInput = 1597,
-    kWebkitEditableContentChangedOnTextArea = 1598,
-    kWebkitEditableContentChangedOnContentEditable = 1599,
-    kWebkitEditableContentChangedOnNotNode = 1600,
-    kV8NavigatorUserMediaError_ConstraintName_AttributeGetter = 1601,
-    kV8HTMLMediaElement_SrcObject_AttributeGetter = 1602,
-    kV8HTMLMediaElement_SrcObject_AttributeSetter = 1603,
-    kCreateObjectURLBlob = 1604,
-    kCreateObjectURLMediaSource = 1605,
-    kCreateObjectURLMediaStream = 1606,
-    kDocumentCreateTouchWindowNull = 1607,
-    kDocumentCreateTouchWindowWrongType = 1608,
-    kDocumentCreateTouchTargetNull = 1609,
-    kDocumentCreateTouchTargetWrongType = 1610,
-    kDocumentCreateTouchMoreThanSevenArguments = 1612,
-    kLongTaskObserver = 1615,
-    kCSSOffsetInEffect = 1617,
-    // The above items are available in M55 branch
-
-    kVRGetDisplaysInsecureOrigin = 1618,
-    kVRRequestPresent = 1619,
-    kVRRequestPresentInsecureOrigin = 1620,
-    kVRDeprecatedFieldOfView = 1621,
-    kVideoInCanvas = 1622,
-    kHiddenAutoplayedVideoInCanvas = 1623,
-    kOffscreenCanvas = 1624,
-    kGamepadPose = 1625,
-    kGamepadHand = 1626,
-    kGamepadDisplayId = 1627,
-    kGamepadButtonTouched = 1628,
-    kGamepadPoseHasOrientation = 1629,
-    kGamepadPoseHasPosition = 1630,
-    kGamepadPosePosition = 1631,
-    kGamepadPoseLinearVelocity = 1632,
-    kGamepadPoseLinearAcceleration = 1633,
-    kGamepadPoseOrientation = 1634,
-    kGamepadPoseAngularVelocity = 1635,
-    kGamepadPoseAngularAcceleration = 1636,
-    kV8RTCDataChannel_MaxRetransmitTime_AttributeGetter = 1638,
-    kV8RTCDataChannel_MaxRetransmits_AttributeGetter = 1639,
-    kV8RTCDataChannel_Reliable_AttributeGetter = 1640,
-    kV8RTCPeerConnection_AddStream_Method = 1641,
-    kV8RTCPeerConnection_CreateDTMFSender_Method = 1642,
-    kV8RTCPeerConnection_GetLocalStreams_Method = 1643,
-    kV8RTCPeerConnection_GetRemoteStreams_Method = 1644,
-    kV8RTCPeerConnection_GetStreamById_Method = 1645,
-    kV8RTCPeerConnection_RemoveStream_Method = 1646,
-    kRTCPeerConnectionCreateDataChannelMaxRetransmitTime = 1648,
-    kRTCPeerConnectionCreateDataChannelMaxRetransmits = 1649,
-    kAudioContextCreateConstantSource = 1650,
-    kWebAudioConstantSourceNode = 1651,
-    kLoopbackEmbeddedInSecureContext = 1652,
-    kLoopbackEmbeddedInNonSecureContext = 1653,
-    kBlinkMacSystemFont = 1654,
-    kRTCIceServerURL = 1656,
-    kRTCIceServerURLs = 1657,
-    kOffscreenCanvasTransferToImageBitmap2D = 1658,
-    kOffscreenCanvasTransferToImageBitmapWebGL = 1659,
-    kOffscreenCanvasCommit2D = 1660,
-    kOffscreenCanvasCommitWebGL = 1661,
-    kRTCConfigurationIceTransportPolicy = 1662,
-    kRTCConfigurationIceTransports = 1664,
-    kDocumentFullscreenElementInV0Shadow = 1665,
-    kScriptWithCSPBypassingSchemeParserInserted = 1666,
-    kScriptWithCSPBypassingSchemeNotParserInserted = 1667,
-    kDocumentCreateElement2ndArgStringHandling = 1668,
-    kV8MediaRecorder_Start_Method = 1669,
-    kWebBluetoothRequestDevice = 1670,
-    kUnitlessPerspectiveInPerspectiveProperty = 1671,
-    kUnitlessPerspectiveInTransformProperty = 1672,
-    kV8RTCSessionDescription_Type_AttributeGetter = 1673,
-    kV8RTCSessionDescription_Type_AttributeSetter = 1674,
-    kV8RTCSessionDescription_Sdp_AttributeGetter = 1675,
-    kV8RTCSessionDescription_Sdp_AttributeSetter = 1676,
-    kRTCSessionDescriptionInitNoType = 1677,
-    kRTCSessionDescriptionInitNoSdp = 1678,
-    kHTMLMediaElementPreloadForcedMetadata = 1679,
-    kGenericSensorStart = 1680,
-    kGenericSensorStop = 1681,
-    kTouchEventPreventedNoTouchAction = 1682,
-    kTouchEventPreventedForcedDocumentPassiveNoTouchAction = 1683,
-    kV8Event_StopPropagation_Method = 1684,
-    kV8Event_StopImmediatePropagation_Method = 1685,
-    kImageCaptureConstructor = 1686,
-    kV8Document_RootScroller_AttributeGetter = 1687,
-    kV8Document_RootScroller_AttributeSetter = 1688,
-    kCustomElementRegistryDefine = 1689,
-    kLinkHeaderServiceWorker = 1690,
-    kCSSShadowPiercingDescendantCombinator = 1691,
-    // The above items are available in M56 branch.
-
-    kCSSFlexibleBox = 1692,
-    kCSSGridLayout = 1693,
-    kFullscreenAllowedByOrientationChange = 1696,
-    kServiceWorkerRespondToNavigationRequestWithRedirectedResponse = 1697,
-    kV8AudioContext_Constructor = 1698,
-    kV8OfflineAudioContext_Constructor = 1699,
-    kAppInstalledEventAddListener = 1700,
-    kAudioContextGetOutputTimestamp = 1701,
-    kV8MediaStreamAudioDestinationNode_Constructor = 1702,
-    kV8AnalyserNode_Constructor = 1703,
-    kV8AudioBuffer_Constructor = 1704,
-    kV8AudioBufferSourceNode_Constructor = 1705,
-    kV8AudioProcessingEvent_Constructor = 1706,
-    kV8BiquadFilterNode_Constructor = 1707,
-    kV8ChannelMergerNode_Constructor = 1708,
-    kV8ChannelSplitterNode_Constructor = 1709,
-    kV8ConstantSourceNode_Constructor = 1710,
-    kV8ConvolverNode_Constructor = 1711,
-    kV8DelayNode_Constructor = 1712,
-    kV8DynamicsCompressorNode_Constructor = 1713,
-    kV8GainNode_Constructor = 1714,
-    kV8IIRFilterNode_Constructor = 1715,
-    kV8MediaElementAudioSourceNode_Constructor = 1716,
-    kV8MediaStreamAudioSourceNode_Constructor = 1717,
-    kV8OfflineAudioCompletionEvent_Constructor = 1718,
-    kV8OscillatorNode_Constructor = 1719,
-    kV8PannerNode_Constructor = 1720,
-    kV8PeriodicWave_Constructor = 1721,
-    kV8StereoPannerNode_Constructor = 1722,
-    kV8WaveShaperNode_Constructor = 1723,
-    kV8Headers_GetAll_Method = 1724,
-    kNavigatorVibrateEngagementNone = 1725,
-    kNavigatorVibrateEngagementMinimal = 1726,
-    kNavigatorVibrateEngagementLow = 1727,
-    kNavigatorVibrateEngagementMedium = 1728,
-    kNavigatorVibrateEngagementHigh = 1729,
-    kNavigatorVibrateEngagementMax = 1730,
-    kAlertEngagementNone = 1731,
-    kAlertEngagementMinimal = 1732,
-    kAlertEngagementLow = 1733,
-    kAlertEngagementMedium = 1734,
-    kAlertEngagementHigh = 1735,
-    kAlertEngagementMax = 1736,
-    kConfirmEngagementNone = 1737,
-    kConfirmEngagementMinimal = 1738,
-    kConfirmEngagementLow = 1739,
-    kConfirmEngagementMedium = 1740,
-    kConfirmEngagementHigh = 1741,
-    kConfirmEngagementMax = 1742,
-    kPromptEngagementNone = 1743,
-    kPromptEngagementMinimal = 1744,
-    kPromptEngagementLow = 1745,
-    kPromptEngagementMedium = 1746,
-    kPromptEngagementHigh = 1747,
-    kPromptEngagementMax = 1748,
-    kTopNavInSandbox = 1749,
-    kTopNavInSandboxWithoutGesture = 1750,
-    kTopNavInSandboxWithPerm = 1751,
-    kTopNavInSandboxWithPermButNoGesture = 1752,
-    kReferrerPolicyHeader = 1753,
-    kHTMLAnchorElementReferrerPolicyAttribute = 1754,
-    kHTMLIFrameElementReferrerPolicyAttribute = 1755,
-    kHTMLImageElementReferrerPolicyAttribute = 1756,
-    kHTMLLinkElementReferrerPolicyAttribute = 1757,
-    kBaseElement = 1758,
-    kBaseWithCrossOriginHref = 1759,
-    kBaseWithDataHref = 1760,
-    kBaseWithNewlinesInTarget = 1761,
-    kBaseWithOpenBracketInTarget = 1762,
-    kBaseWouldBeBlockedByDefaultSrc = 1763,
-    kV8AssigmentExpressionLHSIsCallInSloppy = 1764,
-    kV8AssigmentExpressionLHSIsCallInStrict = 1765,
-    kV8PromiseConstructorReturnedUndefined = 1766,
-    kFormSubmittedWithUnclosedFormControl = 1767,
-    kScrollbarUseVerticalScrollbarButton = 1777,
-    kScrollbarUseVerticalScrollbarThumb = 1778,
-    kScrollbarUseVerticalScrollbarTrack = 1779,
-    kScrollbarUseHorizontalScrollbarButton = 1780,
-    kScrollbarUseHorizontalScrollbarThumb = 1781,
-    kScrollbarUseHorizontalScrollbarTrack = 1782,
-    kHTMLTableCellElementColspan = 1783,
-    kHTMLTableCellElementColspanGreaterThan1000 = 1784,
-    kHTMLTableCellElementColspanGreaterThan8190 = 1785,
-    kSelectionAddRangeIntersect = 1786,
-    kPostMessageFromInsecureToSecureToplevel = 1787,
-    // The above items are available in M57 branch.
-
-    kV8MediaSession_Metadata_AttributeGetter = 1788,
-    kV8MediaSession_Metadata_AttributeSetter = 1789,
-    kV8MediaSession_PlaybackState_AttributeGetter = 1790,
-    kV8MediaSession_PlaybackState_AttributeSetter = 1791,
-    kV8MediaSession_SetActionHandler_Method = 1792,
-    kWebNFCPush = 1793,
-    kWebNFCCancelPush = 1794,
-    kWebNFCWatch = 1795,
-    kWebNFCCancelWatch = 1796,
-    kAudioParamCancelAndHoldAtTime = 1797,
-    kCSSValueUserModifyReadOnly = 1798,
-    kCSSValueUserModifyReadWrite = 1799,
-    kCSSValueUserModifyReadWritePlaintextOnly = 1800,
-    kCSSValueOnDemand = 1802,
-    kServiceWorkerNavigationPreload = 1803,
-    kFullscreenRequestWithPendingElement = 1804,
-    kHTMLIFrameElementAllowfullscreenAttributeSetAfterContentLoad = 1805,
-    kPointerEventSetCaptureOutsideDispatch = 1806,
-    kNotificationPermissionRequestedInsecureOrigin = 1807,
-    kV8DeprecatedStorageInfo_QueryUsageAndQuota_Method = 1808,
-    kV8DeprecatedStorageInfo_RequestQuota_Method = 1809,
-    kV8DeprecatedStorageQuota_QueryUsageAndQuota_Method = 1810,
-    kV8DeprecatedStorageQuota_RequestQuota_Method = 1811,
-    kV8FileReaderSync_Constructor = 1812,
-    kUncancelableTouchEventPreventDefaulted = 1813,
-    kUncancelableTouchEventDueToMainThreadResponsivenessPreventDefaulted = 1814,
-    kV8HTMLVideoElement_Poster_AttributeGetter = 1815,
-    kV8HTMLVideoElement_Poster_AttributeSetter = 1816,
-    kNotificationPermissionRequestedIframe = 1817,
-    kPresentationReceiverInsecureOrigin = 1819,
-    kPresentationReceiverSecureOrigin = 1820,
-    kPresentationRequestInsecureOrigin = 1821,
-    kPresentationRequestSecureOrigin = 1822,
-    kRtcpMuxPolicyNegotiate = 1823,
-    kDOMClobberedVariableAccessed = 1824,
-    kHTMLDocumentCreateProcessingInstruction = 1825,
-    kFetchResponseConstructionWithStream = 1826,
-    kLocationOrigin = 1827,
-    kDocumentOrigin = 1828,
-    kCanvas2DFilter = 1830,
-    kCanvas2DImageSmoothingQuality = 1831,
-    kCanvasToBlob = 1832,
-    kCanvasToDataURL = 1833,
-    kOffscreenCanvasConvertToBlob = 1834,
-    kSVGInCanvas2D = 1835,
-    kSVGInWebGL = 1836,
-    kSelectionFuncionsChangeFocus = 1837,
-    kHTMLObjectElementGetter = 1838,
-    kHTMLObjectElementSetter = 1839,
-    kHTMLEmbedElementGetter = 1840,
-    kHTMLEmbedElementSetter = 1841,
-    kTransformUsesBoxSizeOnSVG = 1842,
-    // The above items are available in M58 branch.
-
-    kScrollByKeyboardArrowKeys = 1843,
-    kScrollByKeyboardPageUpDownKeys = 1844,
-    kScrollByKeyboardHomeEndKeys = 1845,
-    kScrollByKeyboardSpacebarKey = 1846,
-    kScrollByTouch = 1847,
-    kScrollByWheel = 1848,
-    kScheduledActionIgnored = 1849,
-    kGetCanvas2DContextAttributes = 1850,
-    kV8HTMLInputElement_Capture_AttributeGetter = 1851,
-    kV8HTMLInputElement_Capture_AttributeSetter = 1852,
-    kHTMLMediaElementControlsListAttribute = 1853,
-    kHTMLMediaElementControlsListNoDownload = 1854,
-    kHTMLMediaElementControlsListNoFullscreen = 1855,
-    kHTMLMediaElementControlsListNoRemotePlayback = 1856,
-    kPointerEventClickRetargetCausedByCapture = 1857,
-    kVRDisplayDisplayName = 1861,
-    kVREyeParametersOffset = 1862,
-    kVRPoseLinearVelocity = 1863,
-    kVRPoseLinearAcceleration = 1864,
-    kVRPoseAngularVelocity = 1865,
-    kVRPoseAngularAcceleration = 1866,
-    kCSSOverflowPaged = 1867,
-    kChildSrcAllowedWorkerThatScriptSrcBlocked = 1868,
-    kHTMLTableElementPresentationAttributeBackground = 1869,
-    kV8Navigator_GetInstalledRelatedApps_Method = 1870,
-    kNamedAccessOnWindow_ChildBrowsingContext = 1871,
-    kNamedAccessOnWindow_ChildBrowsingContext_CrossOriginNameMismatch = 1872,
-    kV0CustomElementsRegisterHTMLCustomTag = 1873,
-    kV0CustomElementsRegisterHTMLTypeExtension = 1874,
-    kV0CustomElementsRegisterSVGElement = 1875,
-    kV0CustomElementsRegisterEmbedderElement = 1876,
-    kV0CustomElementsCreateCustomTagElement = 1877,
-    kV0CustomElementsCreateTypeExtensionElement = 1878,
-    kV0CustomElementsConstruct = 1879,
-    kV8IDBObserver_Observe_Method = 1880,
-    kV8IDBObserver_Unobserve_Method = 1881,
-    kWebBluetoothRemoteCharacteristicGetDescriptor = 1882,
-    kWebBluetoothRemoteCharacteristicGetDescriptors = 1883,
-    kWebBluetoothRemoteCharacteristicReadValue = 1884,
-    kWebBluetoothRemoteCharacteristicWriteValue = 1885,
-    kWebBluetoothRemoteCharacteristicStartNotifications = 1886,
-    kWebBluetoothRemoteCharacteristicStopNotifications = 1887,
-    kWebBluetoothRemoteDescriptorReadValue = 1888,
-    kWebBluetoothRemoteDescriptorWriteValue = 1889,
-    kWebBluetoothRemoteServerConnect = 1890,
-    kWebBluetoothRemoteServerDisconnect = 1891,
-    kWebBluetoothRemoteServerGetPrimaryService = 1892,
-    kWebBluetoothRemoteServerGetPrimaryServices = 1893,
-    kWebBluetoothRemoteServiceGetCharacteristic = 1894,
-    kWebBluetoothRemoteServiceGetCharacteristics = 1895,
-    kHTMLContentElement = 1896,
-    kHTMLShadowElement = 1897,
-    kHTMLSlotElement = 1898,
-    kAccelerometerConstructor = 1899,
-    kAbsoluteOrientationSensorConstructor = 1900,
-    kAmbientLightSensorConstructor = 1901,
-    kGenericSensorOnActivate = 1902,
-    kGenericSensorOnChange = 1903,
-    kGenericSensorOnError = 1904,
-    kGenericSensorActivated = 1905,
-    kGyroscopeConstructor = 1906,
-    kMagnetometerConstructor = 1907,
-    kOrientationSensorPopulateMatrix = 1908,
-    kWindowOpenWithInvalidURL = 1909,
-    kCrossOriginMainFrameNulledNameAccessed = 1910,
-    kMenuItemElementIconAttribute = 1911,
-    kWebkitCSSMatrixSetMatrixValue = 1912,
-    kWebkitCSSMatrixConstructFromString = 1913,
-    kCanRequestURLHTTPContainingNewline = 1914,
-    kGetGamepads = 1916,
-    kV8SVGPathElement_GetPathSegAtLength_Method = 1917,
-    kMediaStreamConstraintsAudio = 1918,
-    kMediaStreamConstraintsAudioUnconstrained = 1919,
-    kMediaStreamConstraintsVideo = 1920,
-    kMediaStreamConstraintsVideoUnconstrained = 1921,
-    kMediaStreamConstraintsWidth = 1922,
-    kMediaStreamConstraintsHeight = 1923,
-    kMediaStreamConstraintsAspectRatio = 1924,
-    kMediaStreamConstraintsFrameRate = 1925,
-    kMediaStreamConstraintsFacingMode = 1926,
-    kMediaStreamConstraintsVolume = 1927,
-    kMediaStreamConstraintsSampleRate = 1928,
-    kMediaStreamConstraintsSampleSize = 1929,
-    kMediaStreamConstraintsEchoCancellation = 1930,
-    kMediaStreamConstraintsLatency = 1931,
-    kMediaStreamConstraintsChannelCount = 1932,
-    kMediaStreamConstraintsDeviceIdAudio = 1933,
-    kMediaStreamConstraintsDeviceIdVideo = 1934,
-    kMediaStreamConstraintsDisableLocalEcho = 1935,
-    kMediaStreamConstraintsGroupIdAudio = 1936,
-    kMediaStreamConstraintsGroupIdVideo = 1937,
-    kMediaStreamConstraintsVideoKind = 1938,
-    kMediaStreamConstraintsDepthNear = 1939,
-    kMediaStreamConstraintsDepthFar = 1940,
-    kMediaStreamConstraintsFocalLengthX = 1941,
-    kMediaStreamConstraintsFocalLengthY = 1942,
-    kMediaStreamConstraintsMediaStreamSourceAudio = 1943,
-    kMediaStreamConstraintsMediaStreamSourceVideo = 1944,
-    kMediaStreamConstraintsRenderToAssociatedSink = 1945,
-    kMediaStreamConstraintsHotwordEnabled = 1946,
-    kMediaStreamConstraintsGoogEchoCancellation = 1947,
-    kMediaStreamConstraintsGoogExperimentalEchoCancellation = 1948,
-    kMediaStreamConstraintsGoogAutoGainControl = 1949,
-    kMediaStreamConstraintsGoogExperimentalAutoGainControl = 1950,
-    kMediaStreamConstraintsGoogNoiseSuppression = 1951,
-    kMediaStreamConstraintsGoogHighpassFilter = 1952,
-    kMediaStreamConstraintsGoogTypingNoiseDetection = 1953,
-    kMediaStreamConstraintsGoogExperimentalNoiseSuppression = 1954,
-    kMediaStreamConstraintsGoogBeamforming = 1955,
-    kMediaStreamConstraintsGoogArrayGeometry = 1956,
-    kMediaStreamConstraintsGoogAudioMirroring = 1957,
-    kMediaStreamConstraintsGoogDAEchoCancellation = 1958,
-    kMediaStreamConstraintsGoogNoiseReduction = 1959,
-    kMediaStreamConstraintsGoogPowerLineFrequency = 1960,
-    // The above items are available in M59 branch.
-
-    kViewportFixedPositionUnderFilter = 1961,
-    kRequestMIDIAccessWithSysExOption = 1962,
-    kRequestMIDIAccessIframeWithSysExOption = 1963,
-    kGamepadAxes = 1964,
-    kGamepadButtons = 1965,
-    kVibrateWithoutUserGesture = 1966,
-    kDispatchMouseEventOnDisabledFormControl = 1967,
-    kElementNameDOMInvalidHTMLParserValid = 1968,
-    kElementNameDOMValidHTMLParserInvalid = 1969,
-    kGATTServerDisconnectedEvent = 1970,
-    kAnchorClickDispatchForNonConnectedNode = 1971,
-    kHTMLParseErrorNestedForm = 1972,
-    kFontShapingNotDefGlyphObserved = 1973,
-    kPostMessageOutgoingWouldBeBlockedByConnectSrc = 1974,
-    kPostMessageIncomingWouldBeBlockedByConnectSrc = 1975,
-    kPaymentRequestNetworkNameInSupportedMethods = 1976,
-    kCrossOriginPropertyAccess = 1977,
-    kCrossOriginPropertyAccessFromOpener = 1978,
-    kCredentialManagerCreate = 1979,
-    kWebDatabaseCreateDropFTS3Table = 1980,
-    kFieldEditInSecureContext = 1981,
-    kFieldEditInNonSecureContext = 1982,
-    kCredentialManagerCredentialRequestOptionsUnmediated = 1983,
-    kCredentialManagerGetMediationRequired = 1984,
-    kCredentialManagerIdName = 1985,
-    kCredentialManagerPasswordName = 1986,
-    kCredentialManagerAdditionalData = 1987,
-    kCredentialManagerCustomFetch = 1988,
-    kNetInfoRtt = 1989,
-    kNetInfoDownlink = 1990,
-    kShapeDetection_BarcodeDetectorConstructor = 1991,
-    kShapeDetection_FaceDetectorConstructor = 1992,
-    kShapeDetection_TextDetectorConstructor = 1993,
-    kCredentialManagerCredentialRequestOptionsOnlyUnmediated = 1994,
-    kInertAttribute = 1995,
-    kPluginInstanceAccessFromIsolatedWorld = 1996,
-    kPluginInstanceAccessFromMainWorld = 1997,
-    kRequestFullscreenForDialogElement = 1998,
-    kRequestFullscreenForDialogElementInTopLayer = 1999,
-    kShowModalForElementInFullscreenStack = 2000,
-    kThreeValuedPositionBackground = 2001,
-    kThreeValuedPositionBasicShape = 2002,
-    kThreeValuedPositionGradient = 2003,
-    kThreeValuedPositionObjectPosition = 2004,
-    kThreeValuedPositionPerspectiveOrigin = 2005,
-    kUnitlessZeroAngleFilter = 2007,
-    kUnitlessZeroAngleGradient = 2008,
-    kUnitlessZeroAngleOffsetRotate = 2009,
-    kUnitlessZeroAngleTransform = 2010,
-    kHTMLOListElementStartGetterReversedWithoutStartAttribute = 2011,
-    kCredentialManagerPreventSilentAccess = 2012,
-    kNetInfoEffectiveType = 2013,
-    kV8SpeechRecognition_Start_Method = 2014,
-    kTableRowDirectionDifferentFromTable = 2015,
-    kTableSectionDirectionDifferentFromTable = 2016,
-    // The above items are available in M60 branch.
-
-    kClientHintsDeviceRAM = 2017,
-    kCSSRegisterProperty = 2018,
-    // Add new features immediately above this line. Don't change assigned
-    // numbers of any item, and don't reuse removed slots.
-    // Also, run update_use_counter_feature_enum.py in
-    // chromium/src/tools/metrics/histograms/ to update the UMA mapping.
-    kNumberOfFeatures,  // This enum value must be last.
+#include "public/platform/UseCounterFeature.def"
   };
 
   // An interface to observe UseCounter changes. Note that this is never
@@ -1637,18 +90,28 @@ class CORE_EXPORT UseCounter {
     // Notified when a feature is counted for the first time. This should return
     // true if it no longer needs to observe changes so that the counter can
     // remove a reference to the observer and stop notifications.
-    virtual bool OnCountFeature(Feature) = 0;
+    virtual bool OnCountFeature(WebFeature) = 0;
 
     DEFINE_INLINE_VIRTUAL_TRACE() {}
   };
 
   // "count" sets the bit for this feature to 1. Repeated calls are ignored.
-  static void Count(const LocalFrame*, Feature);
-  static void Count(const Document&, Feature);
-  static void Count(ExecutionContext*, Feature);
+  static void Count(const LocalFrame*, WebFeature);
+  static void Count(const Document&, WebFeature);
+  static void Count(ExecutionContext*, WebFeature);
+  // TODO(lunalu): Deprecate Count() that takes UseCounter::Feature.
+  static void Count(const LocalFrame* frame, Feature feature) {
+    return Count(frame, static_cast<WebFeature>(feature));
+  }
+  static void Count(const Document& document, Feature feature) {
+    return Count(document, static_cast<WebFeature>(feature));
+  }
+  static void Count(ExecutionContext* exec_context, Feature feature) {
+    return Count(exec_context, static_cast<WebFeature>(feature));
+  }
 
   void Count(CSSParserMode, CSSPropertyID);
-  void Count(Feature, const LocalFrame*);
+  void Count(WebFeature, const LocalFrame*);
 
   static void CountAnimatedCSS(const Document&, CSSPropertyID);
   void CountAnimatedCSS(CSSPropertyID);
@@ -1682,12 +145,18 @@ class CORE_EXPORT UseCounter {
   void MuteForInspector();
   void UnmuteForInspector();
 
-  void RecordMeasurement(Feature);
+  void RecordMeasurement(WebFeature);
+  void RecordMeasurement(Feature feature) {
+    return RecordMeasurement(static_cast<WebFeature>(feature));
+  }
 
   // Return whether the feature has been seen since the last page load
   // (except when muted).  Does include features seen in documents which have
   // reporting disabled.
-  bool HasRecordedMeasurement(Feature) const;
+  bool HasRecordedMeasurement(WebFeature) const;
+  bool HasRecordedMeasurement(Feature feature) const {
+    return HasRecordedMeasurement(static_cast<WebFeature>(feature));
+  }
 
   DECLARE_TRACE();
 
@@ -1695,7 +164,7 @@ class CORE_EXPORT UseCounter {
   // Notifies that a feature is newly counted to |m_observers|. This shouldn't
   // be called when the counter is disabled by |m_muteCount| or when |m_context|
   // if kDisabledContext.
-  void NotifyFeatureCounted(Feature);
+  void NotifyFeatureCounted(WebFeature);
 
   EnumerationHistogram& FeaturesHistogram() const;
   EnumerationHistogram& CssHistogram() const;
@@ -1723,7 +192,7 @@ class CORE_EXPORT UseCounter {
    public:
     LegacyCounter();
     ~LegacyCounter();
-    void CountFeature(Feature);
+    void CountFeature(WebFeature);
     void CountCSS(CSSPropertyID);
     void UpdateMeasurements();