Expose UseCounter::Feature enum out of blink as WebFeature

third_party/WebKit/Source/core/frame/UseCounterDeprecatedFeature.in

Index: third_party/WebKit/Source/core/frame/UseCounterDeprecatedFeature.in
diff --git a/third_party/WebKit/Source/core/frame/UseCounterDeprecatedFeature.in b/third_party/WebKit/Source/core/frame/UseCounterDeprecatedFeature.in
new file mode 100644
index 0000000000000000000000000000000000000000..75f851ee8b5824dd2d0c148ad3377d78abb3c7f6
--- /dev/null
+++ b/third_party/WebKit/Source/core/frame/UseCounterDeprecatedFeature.in
@@ -0,0 +1,1520 @@
+// NOTE: This enum is being deprecated. Please add your new Feature enum value
+// in "public/platform/WebFeature.h".
+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,
+  kMouseEventWhich = 595,
+  kUIEventWhich = 598,
+  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,
+  kCredentialManagerGetWithUI = 961,
+  kCredentialManagerGetWithoutUI = 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_ScrollLeft_AttributeGetter = 1458,
+  kV8VisualViewport_ScrollTop_AttributeGetter = 1459,
+  kV8VisualViewport_PageX_AttributeGetter = 1460,
+  kV8VisualViewport_PageY_AttributeGetter = 1461,
+  kV8VisualViewport_ClientWidth_AttributeGetter = 1462,
+  kV8VisualViewport_ClientHeight_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,
+  kV8BarcodeDetector_Detect_Method = 1694,
+  kV8FaceDetector_Detect_Method = 1695,
+  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,
+  kDocumentCompleteURLHTTPContainingNewline = 1768,
+  kDocumentCompleteURLHTTPContainingNewlineAndLessThan = 1770,
+  kDocumentCompleteURLNonHTTPContainingNewline = 1771,
+  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,
+  kV8TextDetector_Detect_Method = 1801,
+  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,
+  kCanRequestURLNonHTTPContainingNewline = 1915,
+  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,
+
+  // 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.
+};
+