| /* |
| * Copyright (C) 2012 Google, Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY GOOGLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef UseCounter_h |
| #define UseCounter_h |
| |
| #include "core/CSSPropertyNames.h" |
| #include "wtf/BitVector.h" |
| #include "wtf/Noncopyable.h" |
| #include "wtf/OwnPtr.h" |
| #include "wtf/PassOwnPtr.h" |
| #include "wtf/text/WTFString.h" |
| |
| namespace blink { |
| |
| class CSSStyleSheet; |
| class LocalDOMWindow; |
| class Document; |
| class ExecutionContext; |
| class StyleSheetContents; |
| |
| // UseCounter is used for counting the number of times features of |
| // Blink are used on real web pages and help us know commonly |
| // features are used and thus when it's safe to remove or change them. |
| // |
| // The Chromium Content layer controls what is done with this data. |
| // For instance, in Google Chrome, these counts are submitted |
| // anonymously through the Histogram recording system in Chrome |
| // for users who opt-in to "Usage Statistics" submission |
| // during their install of Google Chrome: |
| // http://www.google.com/chrome/intl/en/privacy.html |
| |
| class UseCounter { |
| WTF_MAKE_NONCOPYABLE(UseCounter); |
| public: |
| UseCounter(); |
| ~UseCounter(); |
| |
| enum Feature { |
| // Do not change assigned numbers of existing items: add new features |
| // to the end of the list. |
| PageDestruction = 0, |
| PrefixedIndexedDB = 3, |
| WorkerStart = 4, |
| SharedWorkerStart = 5, |
| UnprefixedIndexedDB = 9, |
| OpenWebDatabase = 10, |
| UnprefixedRequestAnimationFrame = 13, |
| PrefixedRequestAnimationFrame = 14, |
| ContentSecurityPolicy = 15, |
| ContentSecurityPolicyReportOnly = 16, |
| PrefixedTransitionEndEvent = 18, |
| UnprefixedTransitionEndEvent = 19, |
| PrefixedAndUnprefixedTransitionEndEvent = 20, |
| AutoFocusAttribute = 21, |
| DataListElement = 23, |
| FormAttribute = 24, |
| IncrementalAttribute = 25, |
| InputTypeColor = 26, |
| InputTypeDate = 27, |
| InputTypeDateTimeFallback = 29, |
| InputTypeDateTimeLocal = 30, |
| InputTypeEmail = 31, |
| InputTypeMonth = 32, |
| InputTypeNumber = 33, |
| InputTypeRange = 34, |
| InputTypeSearch = 35, |
| InputTypeTel = 36, |
| InputTypeTime = 37, |
| InputTypeURL = 38, |
| InputTypeWeek = 39, |
| InputTypeWeekFallback = 40, |
| ListAttribute = 41, |
| MaxAttribute = 42, |
| MinAttribute = 43, |
| PatternAttribute = 44, |
| PlaceholderAttribute = 45, |
| PrefixedDirectoryAttribute = 47, |
| RequiredAttribute = 49, |
| ResultsAttribute = 50, |
| StepAttribute = 51, |
| PageVisits = 52, |
| HTMLMarqueeElement = 53, |
| Reflection = 55, |
| PrefixedStorageInfo = 57, |
| XFrameOptions = 58, |
| XFrameOptionsSameOrigin = 59, |
| XFrameOptionsSameOriginWithBadAncestorChain = 60, |
| DeprecatedFlexboxWebContent = 61, |
| DeprecatedFlexboxChrome = 62, |
| DeprecatedFlexboxChromeExtension = 63, |
| UnprefixedPerformanceTimeline = 65, |
| UnprefixedUserTiming = 67, |
| WindowEvent = 69, |
| ContentSecurityPolicyWithBaseElement = 70, |
| PrefixedMediaAddKey = 71, |
| PrefixedMediaGenerateKeyRequest = 72, |
| DocumentClear = 74, |
| SVGFontElement = 76, |
| XMLDocument = 77, |
| XSLProcessingInstruction = 78, |
| XSLTProcessor = 79, |
| SVGSwitchElement = 80, |
| DocumentAll = 83, |
| FormElement = 84, |
| DemotedFormElement = 85, |
| SVGAnimationElement = 90, |
| KeyboardEventKeyLocation = 91, |
| LineClamp = 96, |
| SubFrameBeforeUnloadRegistered = 97, |
| SubFrameBeforeUnloadFired = 98, |
| TextReplaceWholeText = 100, |
| ConsoleMarkTimeline = 102, |
| CSSPseudoElementUserAgentCustomPseudo = 103, |
| ElementGetAttributeNode = 107, // Removed from DOM4. |
| ElementSetAttributeNode = 108, // Removed from DOM4. |
| ElementRemoveAttributeNode = 109, // Removed from DOM4. |
| ElementGetAttributeNodeNS = 110, // Removed from DOM4. |
| DocumentCreateAttribute = 111, // Removed from DOM4. |
| DocumentCreateAttributeNS = 112, // Removed from DOM4. |
| DocumentCreateCDATASection = 113, // Removed from DOM4. |
| DocumentInputEncoding = 114, // Removed from DOM4. |
| DocumentXMLEncoding = 115, // Removed from DOM4. |
| DocumentXMLStandalone = 116, // Removed from DOM4. |
| DocumentXMLVersion = 117, // Removed from DOM4. |
| NodeIsSameNode = 118, // Removed from DOM4. |
| NodeNamespaceURI = 120, // Removed from DOM4. |
| NodeLocalName = 122, // Removed from DOM4. |
| NavigatorProductSub = 123, |
| NavigatorVendor = 124, |
| NavigatorVendorSub = 125, |
| FileError = 126, |
| DocumentCharset = 127, // Documented as IE extensions = 0, from KHTML days. |
| PrefixedAnimationEndEvent = 128, |
| UnprefixedAnimationEndEvent = 129, |
| PrefixedAndUnprefixedAnimationEndEvent = 130, |
| PrefixedAnimationStartEvent = 131, |
| UnprefixedAnimationStartEvent = 132, |
| PrefixedAndUnprefixedAnimationStartEvent = 133, |
| PrefixedAnimationIterationEvent = 134, |
| UnprefixedAnimationIterationEvent = 135, |
| PrefixedAndUnprefixedAnimationIterationEvent = 136, |
| EventReturnValue = 137, // Legacy IE extension. |
| SVGSVGElement = 138, |
| InsertAdjacentText = 140, |
| InsertAdjacentElement = 141, |
| HasAttributes = 142, // Removed from DOM4. |
| DOMSubtreeModifiedEvent = 143, |
| DOMNodeInsertedEvent = 144, |
| DOMNodeRemovedEvent = 145, |
| DOMNodeRemovedFromDocumentEvent = 146, |
| DOMNodeInsertedIntoDocumentEvent = 147, |
| DOMCharacterDataModifiedEvent = 148, |
| DocumentAllLegacyCall = 150, |
| HTMLAppletElementLegacyCall = 151, |
| HTMLEmbedElementLegacyCall = 152, |
| HTMLObjectElementLegacyCall = 153, |
| GetMatchedCSSRules = 155, |
| SVGFontInCSS = 156, |
| AttributeOwnerElement = 160, // Removed in DOM4. |
| AttributeSpecified = 162, // Removed in DOM4. |
| PrefixedAudioDecodedByteCount = 164, |
| PrefixedVideoDecodedByteCount = 165, |
| PrefixedVideoSupportsFullscreen = 166, |
| PrefixedVideoDisplayingFullscreen = 167, |
| PrefixedVideoEnterFullscreen = 168, |
| PrefixedVideoExitFullscreen = 169, |
| PrefixedVideoEnterFullScreen = 170, |
| PrefixedVideoExitFullScreen = 171, |
| PrefixedVideoDecodedFrameCount = 172, |
| PrefixedVideoDroppedFrameCount = 173, |
| PrefixedElementRequestFullscreen = 176, |
| PrefixedElementRequestFullScreen = 177, |
| BarPropLocationbar = 178, |
| BarPropMenubar = 179, |
| BarPropPersonalbar = 180, |
| BarPropScrollbars = 181, |
| BarPropStatusbar = 182, |
| BarPropToolbar = 183, |
| InputTypeEmailMultiple = 184, |
| InputTypeEmailMaxLength = 185, |
| InputTypeEmailMultipleMaxLength = 186, |
| InputTypeText = 190, |
| InputTypeTextMaxLength = 191, |
| InputTypePassword = 192, |
| InputTypePasswordMaxLength = 193, |
| ShowModalDialog = 195, |
| PrefixedPageVisibility = 196, |
| CSSStyleSheetInsertRuleOptionalArg = 198, // Inconsistent with the specification and other browsers. |
| DocumentBeforeUnloadRegistered = 200, |
| DocumentBeforeUnloadFired = 201, |
| DocumentUnloadRegistered = 202, |
| DocumentUnloadFired = 203, |
| SVGLocatableNearestViewportElement = 204, |
| SVGLocatableFarthestViewportElement = 205, |
| HTMLHeadElementProfile = 207, |
| OverflowChangedEvent = 208, |
| SVGPointMatrixTransform = 209, |
| DOMFocusInOutEvent = 211, |
| FileGetLastModifiedDate = 212, |
| HTMLElementInnerText = 213, |
| HTMLElementOuterText = 214, |
| ReplaceDocumentViaJavaScriptURL = 215, |
| ElementSetAttributeNodeNS = 216, // Removed from DOM4. |
| ElementPrefixedMatchesSelector = 217, |
| CSSStyleSheetRules = 219, |
| CSSStyleSheetAddRule = 220, |
| CSSStyleSheetRemoveRule = 221, |
| // The above items are available in M33 branch. |
| |
| InitMessageEvent = 222, |
| ElementSetPrefix = 224, // Element.prefix is readonly in DOM4. |
| CSSStyleDeclarationGetPropertyCSSValue = 225, |
| PrefixedMediaCancelKeyRequest = 229, |
| DOMImplementationHasFeature = 230, |
| DOMImplementationHasFeatureReturnFalse = 231, |
| CanPlayTypeKeySystem = 232, |
| PrefixedDevicePixelRatioMediaFeature = 233, |
| PrefixedMaxDevicePixelRatioMediaFeature = 234, |
| PrefixedMinDevicePixelRatioMediaFeature = 235, |
| PrefixedTransform3dMediaFeature = 237, |
| PrefixedStorageQuota = 240, |
| ContentSecurityPolicyReportOnlyInMeta = 241, |
| ResetReferrerPolicy = 243, |
| CaseInsensitiveAttrSelectorMatch = 244, // Case-insensitivity dropped from specification. |
| FormNameAccessForImageElement = 246, |
| FormNameAccessForPastNamesMap = 247, |
| FormAssociationByParser = 248, |
| SVGSVGElementInDocument = 250, |
| SVGDocumentRootElement = 251, |
| MediaErrorEncrypted = 253, |
| EventSourceURL = 254, |
| WebSocketURL = 255, |
| WorkerSubjectToCSP = 257, |
| WorkerAllowedByChildBlockedByScript = 258, |
| DeprecatedWebKitGradient = 260, |
| DeprecatedWebKitLinearGradient = 261, |
| DeprecatedWebKitRepeatingLinearGradient = 262, |
| DeprecatedWebKitRadialGradient = 263, |
| DeprecatedWebKitRepeatingRadialGradient = 264, |
| PrefixedImageSmoothingEnabled = 267, |
| UnprefixedImageSmoothingEnabled = 268, |
| // The above items are available in M34 branch. |
| |
| TextAutosizing = 274, |
| HTMLAnchorElementPingAttribute = 276, |
| InsertAdjacentHTML = 278, |
| SVGClassName = 279, |
| HTMLAppletElement = 280, |
| HTMLMediaElementSeekToFragmentStart = 281, |
| HTMLMediaElementPauseAtFragmentEnd = 282, |
| PrefixedWindowURL = 283, |
| PrefixedWorkerURL = 284, // This didn't work because of crbug.com/376039. Available since M37. |
| WindowOrientation = 285, |
| DOMStringListContains = 286, |
| DocumentCaptureEvents = 287, |
| DocumentReleaseEvents = 288, |
| WindowCaptureEvents = 289, |
| WindowReleaseEvents = 290, |
| PrefixedGamepad = 291, |
| ElementAnimateKeyframeListEffectObjectTiming = 292, |
| ElementAnimateKeyframeListEffectDoubleTiming = 293, |
| ElementAnimateKeyframeListEffectNoTiming = 294, |
| DocumentXPathCreateExpression = 295, |
| DocumentXPathCreateNSResolver = 296, |
| DocumentXPathEvaluate = 297, |
| AttrGetValue = 298, |
| AttrSetValue = 299, |
| AnimationConstructorKeyframeListEffectObjectTiming = 300, |
| AnimationConstructorKeyframeListEffectDoubleTiming = 301, |
| AnimationConstructorKeyframeListEffectNoTiming = 302, |
| AttrSetValueWithElement = 303, |
| PrefixedCancelAnimationFrame = 304, |
| PrefixedCancelRequestAnimationFrame = 305, |
| NamedNodeMapGetNamedItem = 306, |
| NamedNodeMapSetNamedItem = 307, |
| NamedNodeMapRemoveNamedItem = 308, |
| NamedNodeMapItem = 309, |
| NamedNodeMapGetNamedItemNS = 310, |
| NamedNodeMapSetNamedItemNS = 311, |
| NamedNodeMapRemoveNamedItemNS = 312, |
| OpenWebDatabaseInWorker = 313, // This didn't work because of crbug.com/376039. Available since M37. |
| OpenWebDatabaseSyncInWorker = 314, // This didn't work because of crbug.com/376039. Available since M37. |
| XHRProgressEventPosition = 316, |
| XHRProgressEventTotalSize = 317, |
| PrefixedDocumentIsFullscreen = 318, |
| PrefixedDocumentFullScreenKeyboardInputAllowed = 319, |
| PrefixedDocumentCurrentFullScreenElement = 320, |
| PrefixedDocumentCancelFullScreen = 321, |
| PrefixedDocumentFullscreenEnabled = 322, |
| PrefixedDocumentFullscreenElement = 323, |
| PrefixedDocumentExitFullscreen = 324, |
| // The above items are available in M35 branch. |
| |
| SVGForeignObjectElement = 325, |
| SelectionSetPosition = 327, |
| AnimationPlayerFinishEvent = 328, |
| SVGSVGElementInXMLDocument = 329, |
| CanvasRenderingContext2DSetAlpha = 330, |
| CanvasRenderingContext2DSetCompositeOperation = 331, |
| CanvasRenderingContext2DSetLineWidth = 332, |
| CanvasRenderingContext2DSetLineCap = 333, |
| CanvasRenderingContext2DSetLineJoin = 334, |
| CanvasRenderingContext2DSetMiterLimit = 335, |
| CanvasRenderingContext2DClearShadow = 336, |
| CanvasRenderingContext2DSetStrokeColor = 337, |
| CanvasRenderingContext2DSetFillColor = 338, |
| CanvasRenderingContext2DDrawImageFromRect = 339, |
| CanvasRenderingContext2DSetShadow = 340, |
| PrefixedPerformanceClearResourceTimings = 341, |
| PrefixedPerformanceSetResourceTimingBufferSize = 342, |
| EventSrcElement = 343, |
| EventCancelBubble = 344, |
| EventPath = 345, |
| EventClipboardData = 346, |
| NodeIteratorDetach = 347, |
| AttrNodeValue = 348, |
| AttrTextContent = 349, |
| EventGetReturnValueTrue = 350, |
| EventGetReturnValueFalse = 351, |
| EventSetReturnValueTrue = 352, |
| EventSetReturnValueFalse = 353, |
| NodeIteratorExpandEntityReferences = 354, |
| TreeWalkerExpandEntityReferences = 355, |
| WindowOffscreenBuffering = 356, |
| WindowDefaultStatus = 357, |
| WindowDefaultstatus = 358, |
| PrefixedTransitionEventConstructor = 361, |
| PrefixedMutationObserverConstructor = 362, |
| PrefixedIDBCursorConstructor = 363, |
| PrefixedIDBDatabaseConstructor = 364, |
| PrefixedIDBFactoryConstructor = 365, |
| PrefixedIDBIndexConstructor = 366, |
| PrefixedIDBKeyRangeConstructor = 367, |
| PrefixedIDBObjectStoreConstructor = 368, |
| PrefixedIDBRequestConstructor = 369, |
| PrefixedIDBTransactionConstructor = 370, |
| NotificationPermission = 371, |
| RangeDetach = 372, |
| HTMLTableElementVspace = 374, |
| HTMLTableElementHspace = 375, |
| PrefixedTouchRadiusX = 378, |
| PrefixedTouchRadiusY = 379, |
| PrefixedTouchRotationAngle = 380, |
| PrefixedTouchForce = 381, |
| PrefixedMouseEventMovementX = 382, |
| PrefixedMouseEventMovementY = 383, |
| PrefixedFileRelativePath = 386, |
| DocumentCaretRangeFromPoint = 387, |
| DocumentGetCSSCanvasContext = 388, |
| ElementScrollIntoViewIfNeeded = 389, |
| RangeCompareNode = 392, |
| RangeExpand = 393, |
| HTMLImageElementX = 396, |
| HTMLImageElementY = 397, |
| SelectionBaseNode = 400, |
| SelectionBaseOffset = 401, |
| SelectionExtentNode = 402, |
| SelectionExtentOffset = 403, |
| SelectionType = 404, |
| SelectionModify = 405, |
| SelectionSetBaseAndExtent = 406, |
| SelectionEmpty = 407, |
| VTTCue = 409, |
| VTTCueRender = 410, |
| VTTCueRenderVertical = 411, |
| VTTCueRenderSnapToLinesFalse = 412, |
| VTTCueRenderLineNotAuto = 413, |
| VTTCueRenderPositionNot50 = 414, |
| VTTCueRenderSizeNot100 = 415, |
| VTTCueRenderAlignNotMiddle = 416, |
| // The above items are available in M36 branch. |
| |
| ElementRequestPointerLock = 417, |
| VTTCueRenderRtl = 418, |
| PostMessageFromSecureToInsecure = 419, |
| PostMessageFromInsecureToSecure = 420, |
| DocumentExitPointerLock = 421, |
| DocumentPointerLockElement = 422, |
| PrefixedCursorZoomIn = 424, |
| PrefixedCursorZoomOut = 425, |
| CSSCharsetRuleEncoding = 426, |
| DocumentSetCharset = 427, |
| DocumentDefaultCharset = 428, |
| TextEncoderConstructor = 429, |
| TextEncoderEncode = 430, |
| TextDecoderConstructor = 431, |
| TextDecoderDecode = 432, |
| FocusInOutEvent = 433, |
| MouseEventMovementX = 434, |
| MouseEventMovementY = 435, |
| MixedContentRaw = 437, |
| MixedContentImage = 438, |
| MixedContentMedia = 439, |
| DocumentFonts = 440, |
| MixedContentFormsSubmitted = 441, |
| FormsSubmitted = 442, |
| TextInputEventOnInput = 443, |
| TextInputEventOnTextArea = 444, |
| TextInputEventOnContentEditable = 445, |
| TextInputEventOnNotNode = 446, |
| WebkitBeforeTextInsertedOnInput = 447, |
| WebkitBeforeTextInsertedOnTextArea = 448, |
| WebkitBeforeTextInsertedOnContentEditable = 449, |
| WebkitBeforeTextInsertedOnNotNode = 450, |
| WebkitEditableContentChangedOnInput = 451, |
| WebkitEditableContentChangedOnTextArea = 452, |
| WebkitEditableContentChangedOnContentEditable = 453, |
| WebkitEditableContentChangedOnNotNode = 454, |
| HTMLImports = 455, |
| ElementCreateShadowRoot = 456, |
| DocumentRegisterElement = 457, |
| EditingAppleInterchangeNewline = 458, |
| EditingAppleConvertedSpace = 459, |
| EditingApplePasteAsQuotation = 460, |
| EditingAppleStyleSpanClass = 461, |
| EditingAppleTabSpanClass = 462, |
| HTMLImportsAsyncAttribute = 463, |
| FontFaceSetReady = 464, |
| XMLHttpRequestSynchronous = 465, |
| CSSSelectorPseudoUnresolved = 466, |
| CSSSelectorPseudoShadow = 467, |
| CSSSelectorPseudoContent = 468, |
| CSSSelectorPseudoHost = 469, |
| CSSSelectorPseudoHostContext = 470, |
| CSSDeepCombinator = 471, |
| SyncXHRWithCredentials = 472, |
| // The above items are available in M37 branch. |
| |
| UseAsm = 473, |
| KeyEventNotAllowedInFullScreen = 474, |
| DOMWindowOpen = 475, |
| DOMWindowOpenFeatures = 476, |
| MediaStreamTrackGetSources = 478, |
| AspectRatioFlexItem = 479, |
| DetailsElement = 480, |
| DialogElement = 481, |
| MapElement = 482, |
| MeterElement = 483, |
| ProgressElement = 484, |
| VideoFullscreenAllowedExemption = 485, |
| WebKitPoint = 488, |
| PrefixedHTMLElementDropzone = 490, |
| WheelEventWheelDeltaX = 491, |
| WheelEventWheelDeltaY = 492, |
| WheelEventWheelDelta = 493, |
| SendBeacon = 494, |
| SendBeaconQuotaExceeded = 495, |
| SVGSMILElementInDocument = 501, |
| MouseEventOffsetX = 502, |
| MouseEventOffsetY = 503, |
| MouseEventX = 504, |
| MouseEventY = 505, |
| MouseEventFromElement = 506, |
| MouseEventToElement = 507, |
| RequestFileSystem = 508, |
| RequestFileSystemWorker = 509, |
| RequestFileSystemSyncWorker = 510, |
| UIEventLayerX = 511, |
| UIEventLayerY = 512, |
| UIEventPageX = 513, |
| UIEventPageY = 514, |
| BgPropertiesFixed = 515, |
| HTMLImageElementComposite = 516, |
| DevToolsConsoleTimeline = 517, |
| DevToolsConsoleProfile = 518, |
| SVGStyleElementTitle = 519, |
| PictureSourceSrc = 520, |
| // 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. |
| NumberOfFeatures, // This enum value must be last. |
| }; |
| |
| // "count" sets the bit for this feature to 1. Repeated calls are ignored. |
| static void count(const Document&, Feature); |
| // This doesn't count for ExecutionContexts for shared workers and service |
| // workers. |
| static void count(const ExecutionContext*, Feature); |
| void count(CSSParserContext, CSSPropertyID); |
| void count(Feature); |
| |
| // "countDeprecation" sets the bit for this feature to 1, and sends a deprecation |
| // warning to the console. Repeated calls are ignored. |
| // |
| // Be considerate to developers' consoles: features should only send |
| // deprecation warnings when we're actively interested in removing them from |
| // the platform. |
| // |
| // The ExecutionContext* overload doesn't work for shared workers and |
| // service workers. |
| static void countDeprecation(const LocalDOMWindow*, Feature); |
| static void countDeprecation(ExecutionContext*, Feature); |
| static void countDeprecation(const Document&, Feature); |
| String deprecationMessage(Feature); |
| |
| void didCommitLoad(); |
| |
| static UseCounter* getFrom(const Document*); |
| static UseCounter* getFrom(const CSSStyleSheet*); |
| static UseCounter* getFrom(const StyleSheetContents*); |
| |
| static int mapCSSPropertyIdToCSSSampleIdForHistogram(int id); |
| |
| static void muteForInspector(); |
| static void unmuteForInspector(); |
| |
| private: |
| static int m_muteCount; |
| |
| bool recordMeasurement(Feature feature) |
| { |
| if (UseCounter::m_muteCount) |
| return false; |
| ASSERT(feature != PageDestruction); // PageDestruction is reserved as a scaling factor. |
| ASSERT(feature < NumberOfFeatures); |
| if (!m_countBits) { |
| m_countBits = adoptPtr(new BitVector(NumberOfFeatures)); |
| m_countBits->clearAll(); |
| } |
| |
| if (m_countBits->quickGet(feature)) |
| return false; |
| |
| m_countBits->quickSet(feature); |
| return true; |
| } |
| |
| void updateMeasurements(); |
| |
| OwnPtr<BitVector> m_countBits; |
| BitVector m_CSSFeatureBits; |
| }; |
| |
| } // namespace blink |
| |
| #endif // UseCounter_h |
