1 /* 2 * Copyright (C) 2012 Google, Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY GOOGLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef UseCounter_h 27 #define UseCounter_h 28 29 #include "core/CSSPropertyNames.h" 30 #include "wtf/BitVector.h" 31 #include "wtf/Noncopyable.h" 32 #include "wtf/OwnPtr.h" 33 #include "wtf/PassOwnPtr.h" 34 #include "wtf/text/WTFString.h" 35 36 namespace blink { 37 38 class CSSStyleSheet; 39 class LocalDOMWindow; 40 class Document; 41 class ExecutionContext; 42 class StyleSheetContents; 43 44 // UseCounter is used for counting the number of times features of 45 // Blink are used on real web pages and help us know commonly 46 // features are used and thus when it's safe to remove or change them. 47 // 48 // The Chromium Content layer controls what is done with this data. 49 // For instance, in Google Chrome, these counts are submitted 50 // anonymously through the Histogram recording system in Chrome 51 // for users who opt-in to "Usage Statistics" submission 52 // during their install of Google Chrome: 53 // http://www.google.com/chrome/intl/en/privacy.html 54 55 class UseCounter { 56 WTF_MAKE_NONCOPYABLE(UseCounter); 57 public: 58 UseCounter(); 59 ~UseCounter(); 60 61 enum Feature { 62 // Do not change assigned numbers of existing items: add new features 63 // to the end of the list. 64 PageDestruction = 0, 65 PrefixedIndexedDB = 3, 66 WorkerStart = 4, 67 SharedWorkerStart = 5, 68 UnprefixedIndexedDB = 9, 69 OpenWebDatabase = 10, 70 UnprefixedRequestAnimationFrame = 13, 71 PrefixedRequestAnimationFrame = 14, 72 ContentSecurityPolicy = 15, 73 ContentSecurityPolicyReportOnly = 16, 74 PrefixedTransitionEndEvent = 18, 75 UnprefixedTransitionEndEvent = 19, 76 PrefixedAndUnprefixedTransitionEndEvent = 20, 77 AutoFocusAttribute = 21, 78 DataListElement = 23, 79 FormAttribute = 24, 80 IncrementalAttribute = 25, 81 InputTypeColor = 26, 82 InputTypeDate = 27, 83 InputTypeDateTimeFallback = 29, 84 InputTypeDateTimeLocal = 30, 85 InputTypeEmail = 31, 86 InputTypeMonth = 32, 87 InputTypeNumber = 33, 88 InputTypeRange = 34, 89 InputTypeSearch = 35, 90 InputTypeTel = 36, 91 InputTypeTime = 37, 92 InputTypeURL = 38, 93 InputTypeWeek = 39, 94 InputTypeWeekFallback = 40, 95 ListAttribute = 41, 96 MaxAttribute = 42, 97 MinAttribute = 43, 98 PatternAttribute = 44, 99 PlaceholderAttribute = 45, 100 PrefixedDirectoryAttribute = 47, 101 RequiredAttribute = 49, 102 ResultsAttribute = 50, 103 StepAttribute = 51, 104 PageVisits = 52, 105 HTMLMarqueeElement = 53, 106 Reflection = 55, 107 PrefixedStorageInfo = 57, 108 XFrameOptions = 58, 109 XFrameOptionsSameOrigin = 59, 110 XFrameOptionsSameOriginWithBadAncestorChain = 60, 111 DeprecatedFlexboxWebContent = 61, 112 DeprecatedFlexboxChrome = 62, 113 DeprecatedFlexboxChromeExtension = 63, 114 UnprefixedPerformanceTimeline = 65, 115 UnprefixedUserTiming = 67, 116 WindowEvent = 69, 117 ContentSecurityPolicyWithBaseElement = 70, 118 PrefixedMediaAddKey = 71, 119 PrefixedMediaGenerateKeyRequest = 72, 120 DocumentClear = 74, 121 SVGFontElement = 76, 122 XMLDocument = 77, 123 XSLProcessingInstruction = 78, 124 XSLTProcessor = 79, 125 SVGSwitchElement = 80, 126 DocumentAll = 83, 127 FormElement = 84, 128 DemotedFormElement = 85, 129 SVGAnimationElement = 90, 130 KeyboardEventKeyLocation = 91, 131 LineClamp = 96, 132 SubFrameBeforeUnloadRegistered = 97, 133 SubFrameBeforeUnloadFired = 98, 134 TextReplaceWholeText = 100, 135 ConsoleMarkTimeline = 102, 136 CSSPseudoElementUserAgentCustomPseudo = 103, 137 ElementGetAttributeNode = 107, // Removed from DOM4. 138 ElementSetAttributeNode = 108, // Removed from DOM4. 139 ElementRemoveAttributeNode = 109, // Removed from DOM4. 140 ElementGetAttributeNodeNS = 110, // Removed from DOM4. 141 DocumentCreateAttribute = 111, // Removed from DOM4. 142 DocumentCreateAttributeNS = 112, // Removed from DOM4. 143 DocumentCreateCDATASection = 113, // Removed from DOM4. 144 DocumentInputEncoding = 114, // Removed from DOM4. 145 DocumentXMLEncoding = 115, // Removed from DOM4. 146 DocumentXMLStandalone = 116, // Removed from DOM4. 147 DocumentXMLVersion = 117, // Removed from DOM4. 148 NodeIsSameNode = 118, // Removed from DOM4. 149 NodeNamespaceURI = 120, // Removed from DOM4. 150 NodeLocalName = 122, // Removed from DOM4. 151 NavigatorProductSub = 123, 152 NavigatorVendor = 124, 153 NavigatorVendorSub = 125, 154 FileError = 126, 155 DocumentCharset = 127, // Documented as IE extensions = 0, from KHTML days. 156 PrefixedAnimationEndEvent = 128, 157 UnprefixedAnimationEndEvent = 129, 158 PrefixedAndUnprefixedAnimationEndEvent = 130, 159 PrefixedAnimationStartEvent = 131, 160 UnprefixedAnimationStartEvent = 132, 161 PrefixedAndUnprefixedAnimationStartEvent = 133, 162 PrefixedAnimationIterationEvent = 134, 163 UnprefixedAnimationIterationEvent = 135, 164 PrefixedAndUnprefixedAnimationIterationEvent = 136, 165 EventReturnValue = 137, // Legacy IE extension. 166 SVGSVGElement = 138, 167 InsertAdjacentText = 140, 168 InsertAdjacentElement = 141, 169 HasAttributes = 142, // Removed from DOM4. 170 DOMSubtreeModifiedEvent = 143, 171 DOMNodeInsertedEvent = 144, 172 DOMNodeRemovedEvent = 145, 173 DOMNodeRemovedFromDocumentEvent = 146, 174 DOMNodeInsertedIntoDocumentEvent = 147, 175 DOMCharacterDataModifiedEvent = 148, 176 DocumentAllLegacyCall = 150, 177 HTMLAppletElementLegacyCall = 151, 178 HTMLEmbedElementLegacyCall = 152, 179 HTMLObjectElementLegacyCall = 153, 180 GetMatchedCSSRules = 155, 181 SVGFontInCSS = 156, 182 AttributeOwnerElement = 160, // Removed in DOM4. 183 AttributeSpecified = 162, // Removed in DOM4. 184 PrefixedAudioDecodedByteCount = 164, 185 PrefixedVideoDecodedByteCount = 165, 186 PrefixedVideoSupportsFullscreen = 166, 187 PrefixedVideoDisplayingFullscreen = 167, 188 PrefixedVideoEnterFullscreen = 168, 189 PrefixedVideoExitFullscreen = 169, 190 PrefixedVideoEnterFullScreen = 170, 191 PrefixedVideoExitFullScreen = 171, 192 PrefixedVideoDecodedFrameCount = 172, 193 PrefixedVideoDroppedFrameCount = 173, 194 PrefixedElementRequestFullscreen = 176, 195 PrefixedElementRequestFullScreen = 177, 196 BarPropLocationbar = 178, 197 BarPropMenubar = 179, 198 BarPropPersonalbar = 180, 199 BarPropScrollbars = 181, 200 BarPropStatusbar = 182, 201 BarPropToolbar = 183, 202 InputTypeEmailMultiple = 184, 203 InputTypeEmailMaxLength = 185, 204 InputTypeEmailMultipleMaxLength = 186, 205 InputTypeText = 190, 206 InputTypeTextMaxLength = 191, 207 InputTypePassword = 192, 208 InputTypePasswordMaxLength = 193, 209 ShowModalDialog = 195, 210 PrefixedPageVisibility = 196, 211 CSSStyleSheetInsertRuleOptionalArg = 198, // Inconsistent with the specification and other browsers. 212 DocumentBeforeUnloadRegistered = 200, 213 DocumentBeforeUnloadFired = 201, 214 DocumentUnloadRegistered = 202, 215 DocumentUnloadFired = 203, 216 SVGLocatableNearestViewportElement = 204, 217 SVGLocatableFarthestViewportElement = 205, 218 HTMLHeadElementProfile = 207, 219 OverflowChangedEvent = 208, 220 SVGPointMatrixTransform = 209, 221 DOMFocusInOutEvent = 211, 222 FileGetLastModifiedDate = 212, 223 HTMLElementInnerText = 213, 224 HTMLElementOuterText = 214, 225 ReplaceDocumentViaJavaScriptURL = 215, 226 ElementSetAttributeNodeNS = 216, // Removed from DOM4. 227 ElementPrefixedMatchesSelector = 217, 228 CSSStyleSheetRules = 219, 229 CSSStyleSheetAddRule = 220, 230 CSSStyleSheetRemoveRule = 221, 231 // The above items are available in M33 branch. 232 233 InitMessageEvent = 222, 234 ElementSetPrefix = 224, // Element.prefix is readonly in DOM4. 235 CSSStyleDeclarationGetPropertyCSSValue = 225, 236 PrefixedMediaCancelKeyRequest = 229, 237 DOMImplementationHasFeature = 230, 238 DOMImplementationHasFeatureReturnFalse = 231, 239 CanPlayTypeKeySystem = 232, 240 PrefixedDevicePixelRatioMediaFeature = 233, 241 PrefixedMaxDevicePixelRatioMediaFeature = 234, 242 PrefixedMinDevicePixelRatioMediaFeature = 235, 243 PrefixedTransform3dMediaFeature = 237, 244 PrefixedStorageQuota = 240, 245 ContentSecurityPolicyReportOnlyInMeta = 241, 246 ResetReferrerPolicy = 243, 247 CaseInsensitiveAttrSelectorMatch = 244, // Case-insensitivity dropped from specification. 248 FormNameAccessForImageElement = 246, 249 FormNameAccessForPastNamesMap = 247, 250 FormAssociationByParser = 248, 251 SVGSVGElementInDocument = 250, 252 SVGDocumentRootElement = 251, 253 MediaErrorEncrypted = 253, 254 EventSourceURL = 254, 255 WebSocketURL = 255, 256 WorkerSubjectToCSP = 257, 257 WorkerAllowedByChildBlockedByScript = 258, 258 DeprecatedWebKitGradient = 260, 259 DeprecatedWebKitLinearGradient = 261, 260 DeprecatedWebKitRepeatingLinearGradient = 262, 261 DeprecatedWebKitRadialGradient = 263, 262 DeprecatedWebKitRepeatingRadialGradient = 264, 263 PrefixedImageSmoothingEnabled = 267, 264 UnprefixedImageSmoothingEnabled = 268, 265 // The above items are available in M34 branch. 266 267 TextAutosizing = 274, 268 HTMLAnchorElementPingAttribute = 276, 269 InsertAdjacentHTML = 278, 270 SVGClassName = 279, 271 HTMLAppletElement = 280, 272 HTMLMediaElementSeekToFragmentStart = 281, 273 HTMLMediaElementPauseAtFragmentEnd = 282, 274 PrefixedWindowURL = 283, 275 PrefixedWorkerURL = 284, // This didn't work because of crbug.com/376039. Available since M37. 276 WindowOrientation = 285, 277 DOMStringListContains = 286, 278 DocumentCaptureEvents = 287, 279 DocumentReleaseEvents = 288, 280 WindowCaptureEvents = 289, 281 WindowReleaseEvents = 290, 282 PrefixedGamepad = 291, 283 ElementAnimateKeyframeListEffectObjectTiming = 292, 284 ElementAnimateKeyframeListEffectDoubleTiming = 293, 285 ElementAnimateKeyframeListEffectNoTiming = 294, 286 DocumentXPathCreateExpression = 295, 287 DocumentXPathCreateNSResolver = 296, 288 DocumentXPathEvaluate = 297, 289 AttrGetValue = 298, 290 AttrSetValue = 299, 291 AnimationConstructorKeyframeListEffectObjectTiming = 300, 292 AnimationConstructorKeyframeListEffectDoubleTiming = 301, 293 AnimationConstructorKeyframeListEffectNoTiming = 302, 294 AttrSetValueWithElement = 303, 295 PrefixedCancelAnimationFrame = 304, 296 PrefixedCancelRequestAnimationFrame = 305, 297 NamedNodeMapGetNamedItem = 306, 298 NamedNodeMapSetNamedItem = 307, 299 NamedNodeMapRemoveNamedItem = 308, 300 NamedNodeMapItem = 309, 301 NamedNodeMapGetNamedItemNS = 310, 302 NamedNodeMapSetNamedItemNS = 311, 303 NamedNodeMapRemoveNamedItemNS = 312, 304 XHRProgressEventPosition = 316, 305 XHRProgressEventTotalSize = 317, 306 PrefixedDocumentIsFullscreen = 318, 307 PrefixedDocumentFullScreenKeyboardInputAllowed = 319, 308 PrefixedDocumentCurrentFullScreenElement = 320, 309 PrefixedDocumentCancelFullScreen = 321, 310 PrefixedDocumentFullscreenEnabled = 322, 311 PrefixedDocumentFullscreenElement = 323, 312 PrefixedDocumentExitFullscreen = 324, 313 // The above items are available in M35 branch. 314 315 SVGForeignObjectElement = 325, 316 SelectionSetPosition = 327, 317 AnimationPlayerFinishEvent = 328, 318 SVGSVGElementInXMLDocument = 329, 319 CanvasRenderingContext2DSetAlpha = 330, 320 CanvasRenderingContext2DSetCompositeOperation = 331, 321 CanvasRenderingContext2DSetLineWidth = 332, 322 CanvasRenderingContext2DSetLineCap = 333, 323 CanvasRenderingContext2DSetLineJoin = 334, 324 CanvasRenderingContext2DSetMiterLimit = 335, 325 CanvasRenderingContext2DClearShadow = 336, 326 CanvasRenderingContext2DSetStrokeColor = 337, 327 CanvasRenderingContext2DSetFillColor = 338, 328 CanvasRenderingContext2DDrawImageFromRect = 339, 329 CanvasRenderingContext2DSetShadow = 340, 330 PrefixedPerformanceClearResourceTimings = 341, 331 PrefixedPerformanceSetResourceTimingBufferSize = 342, 332 EventSrcElement = 343, 333 EventCancelBubble = 344, 334 EventPath = 345, 335 EventClipboardData = 346, 336 NodeIteratorDetach = 347, 337 AttrNodeValue = 348, 338 AttrTextContent = 349, 339 EventGetReturnValueTrue = 350, 340 EventGetReturnValueFalse = 351, 341 EventSetReturnValueTrue = 352, 342 EventSetReturnValueFalse = 353, 343 NodeIteratorExpandEntityReferences = 354, 344 TreeWalkerExpandEntityReferences = 355, 345 WindowOffscreenBuffering = 356, 346 WindowDefaultStatus = 357, 347 WindowDefaultstatus = 358, 348 PrefixedTransitionEventConstructor = 361, 349 PrefixedMutationObserverConstructor = 362, 350 PrefixedIDBCursorConstructor = 363, 351 PrefixedIDBDatabaseConstructor = 364, 352 PrefixedIDBFactoryConstructor = 365, 353 PrefixedIDBIndexConstructor = 366, 354 PrefixedIDBKeyRangeConstructor = 367, 355 PrefixedIDBObjectStoreConstructor = 368, 356 PrefixedIDBRequestConstructor = 369, 357 PrefixedIDBTransactionConstructor = 370, 358 NotificationPermission = 371, 359 RangeDetach = 372, 360 HTMLTableElementVspace = 374, 361 HTMLTableElementHspace = 375, 362 PrefixedTouchRadiusX = 378, 363 PrefixedTouchRadiusY = 379, 364 PrefixedTouchRotationAngle = 380, 365 PrefixedTouchForce = 381, 366 PrefixedMouseEventMovementX = 382, 367 PrefixedMouseEventMovementY = 383, 368 PrefixedFileRelativePath = 386, 369 DocumentCaretRangeFromPoint = 387, 370 DocumentGetCSSCanvasContext = 388, 371 ElementScrollIntoViewIfNeeded = 389, 372 RangeCompareNode = 392, 373 RangeExpand = 393, 374 HTMLImageElementX = 396, 375 HTMLImageElementY = 397, 376 SelectionBaseNode = 400, 377 SelectionBaseOffset = 401, 378 SelectionExtentNode = 402, 379 SelectionExtentOffset = 403, 380 SelectionType = 404, 381 SelectionModify = 405, 382 SelectionSetBaseAndExtent = 406, 383 SelectionEmpty = 407, 384 VTTCue = 409, 385 VTTCueRender = 410, 386 VTTCueRenderVertical = 411, 387 VTTCueRenderSnapToLinesFalse = 412, 388 VTTCueRenderLineNotAuto = 413, 389 VTTCueRenderPositionNot50 = 414, 390 VTTCueRenderSizeNot100 = 415, 391 VTTCueRenderAlignNotMiddle = 416, 392 // The above items are available in M36 branch. 393 394 ElementRequestPointerLock = 417, 395 VTTCueRenderRtl = 418, 396 PostMessageFromSecureToInsecure = 419, 397 PostMessageFromInsecureToSecure = 420, 398 DocumentExitPointerLock = 421, 399 DocumentPointerLockElement = 422, 400 PrefixedCursorZoomIn = 424, 401 PrefixedCursorZoomOut = 425, 402 CSSCharsetRuleEncoding = 426, 403 DocumentSetCharset = 427, 404 DocumentDefaultCharset = 428, 405 TextEncoderConstructor = 429, 406 TextEncoderEncode = 430, 407 TextDecoderConstructor = 431, 408 TextDecoderDecode = 432, 409 FocusInOutEvent = 433, 410 MouseEventMovementX = 434, 411 MouseEventMovementY = 435, 412 MixedContentRaw = 437, 413 MixedContentImage = 438, 414 MixedContentMedia = 439, 415 DocumentFonts = 440, 416 MixedContentFormsSubmitted = 441, 417 FormsSubmitted = 442, 418 TextInputEventOnInput = 443, 419 TextInputEventOnTextArea = 444, 420 TextInputEventOnContentEditable = 445, 421 TextInputEventOnNotNode = 446, 422 WebkitBeforeTextInsertedOnInput = 447, 423 WebkitBeforeTextInsertedOnTextArea = 448, 424 WebkitBeforeTextInsertedOnContentEditable = 449, 425 WebkitBeforeTextInsertedOnNotNode = 450, 426 WebkitEditableContentChangedOnInput = 451, 427 WebkitEditableContentChangedOnTextArea = 452, 428 WebkitEditableContentChangedOnContentEditable = 453, 429 WebkitEditableContentChangedOnNotNode = 454, 430 HTMLImports = 455, 431 ElementCreateShadowRoot = 456, 432 DocumentRegisterElement = 457, 433 EditingAppleInterchangeNewline = 458, 434 EditingAppleConvertedSpace = 459, 435 EditingApplePasteAsQuotation = 460, 436 EditingAppleStyleSpanClass = 461, 437 EditingAppleTabSpanClass = 462, 438 HTMLImportsAsyncAttribute = 463, 439 FontFaceSetReady = 464, 440 XMLHttpRequestSynchronous = 465, 441 CSSSelectorPseudoUnresolved = 466, 442 CSSSelectorPseudoShadow = 467, 443 CSSSelectorPseudoContent = 468, 444 CSSSelectorPseudoHost = 469, 445 CSSSelectorPseudoHostContext = 470, 446 CSSDeepCombinator = 471, 447 SyncXHRWithCredentials = 472, 448 // The above items are available in M37 branch. 449 450 UseAsm = 473, 451 KeyEventNotAllowedInFullScreen = 474, 452 DOMWindowOpen = 475, 453 DOMWindowOpenFeatures = 476, 454 MediaStreamTrackGetSources = 478, 455 AspectRatioFlexItem = 479, 456 DetailsElement = 480, 457 DialogElement = 481, 458 MapElement = 482, 459 MeterElement = 483, 460 ProgressElement = 484, 461 VideoFullscreenAllowedExemption = 485, 462 PrefixedHTMLElementDropzone = 490, 463 WheelEventWheelDeltaX = 491, 464 WheelEventWheelDeltaY = 492, 465 WheelEventWheelDelta = 493, 466 SendBeacon = 494, 467 SendBeaconQuotaExceeded = 495, 468 SVGSMILElementInDocument = 501, 469 MouseEventOffsetX = 502, 470 MouseEventOffsetY = 503, 471 MouseEventX = 504, 472 MouseEventY = 505, 473 MouseEventFromElement = 506, 474 MouseEventToElement = 507, 475 RequestFileSystem = 508, 476 RequestFileSystemWorker = 509, 477 RequestFileSystemSyncWorker = 510, 478 UIEventLayerX = 511, 479 UIEventLayerY = 512, 480 UIEventPageX = 513, 481 UIEventPageY = 514, 482 BgPropertiesFixed = 515, 483 HTMLImageElementComposite = 516, 484 DevToolsConsoleTimeline = 517, 485 DevToolsConsoleProfile = 518, 486 SVGStyleElementTitle = 519, 487 PictureSourceSrc = 520, 488 // The above items are available in M38 branch. 489 490 Picture = 521, 491 Sizes = 522, 492 SrcsetXDescriptor = 523, 493 SrcsetWDescriptor = 524, 494 SelectionContainsNode = 525, 495 MediaStreamEnded = 526, 496 MixedContentPrivateIPInPublicWebsitePassive = 527, 497 MixedContentPrivateIPInPublicWebsiteActive = 528, 498 XMLExternalResourceLoad = 529, 499 MixedContentPrivateHostnameInPublicHostname = 530, 500 LegacyProtocolEmbeddedAsSubresource = 531, 501 RequestedSubresourceWithEmbeddedCredentials = 532, 502 NotificationCreated = 533, 503 NotificationClosed = 534, 504 NotificationPermissionRequested = 535, 505 MediaStreamLabel = 536, 506 MediaStreamStop = 537, 507 ConsoleTimeline = 538, 508 ConsoleTimelineEnd = 539, 509 SRIElementWithMatchingIntegrityAttribute = 540, 510 SRIElementWithNonMatchingIntegrityAttribute = 541, 511 SRIElementWithUnparsableIntegrityAttribute = 542, 512 SRIElementWithIntegrityAttributeAndInsecureOrigin = 543, 513 SRIElementWithIntegrityAttributeAndInsecureResource = 544, 514 AnimationPlayerGetStartTime = 545, 515 AnimationPlayerSetStartTime = 546, 516 AnimationPlayerGetCurrentTime = 547, 517 AnimationPlayerSetCurrentTime = 548, 518 AnimationPlayerGetPlaybackRate = 549, 519 AnimationPlayerSetPlaybackRate = 550, 520 AnimationPlayerGetPlayState = 551, 521 AnimationPlayerFinish = 552, 522 AnimationPlayerPlay = 553, 523 AnimationPlayerPause = 554, 524 AnimationPlayerReverse = 555, 525 // Add new features immediately above this line. Don't change assigned 526 // numbers of any item, and don't reuse removed slots. 527 // Also, run update_use_counter_feature_enum.py in chromium/src/tools/metrics/histograms/ 528 // to update the UMA mapping. 529 NumberOfFeatures, // This enum value must be last. 530 }; 531 532 // "count" sets the bit for this feature to 1. Repeated calls are ignored. 533 static void count(const Document&, Feature); 534 // This doesn't count for ExecutionContexts for shared workers and service 535 // workers. 536 static void count(const ExecutionContext*, Feature); 537 void count(CSSParserContext, CSSPropertyID); 538 void count(Feature); 539 540 // "countDeprecation" sets the bit for this feature to 1, and sends a deprecation 541 // warning to the console. Repeated calls are ignored. 542 // 543 // Be considerate to developers' consoles: features should only send 544 // deprecation warnings when we're actively interested in removing them from 545 // the platform. 546 // 547 // The ExecutionContext* overload doesn't work for shared workers and 548 // service workers. 549 static void countDeprecation(const LocalDOMWindow*, Feature); 550 static void countDeprecation(ExecutionContext*, Feature); 551 static void countDeprecation(const Document&, Feature); 552 String deprecationMessage(Feature); 553 554 void didCommitLoad(); 555 556 static UseCounter* getFrom(const Document*); 557 static UseCounter* getFrom(const CSSStyleSheet*); 558 static UseCounter* getFrom(const StyleSheetContents*); 559 560 static int mapCSSPropertyIdToCSSSampleIdForHistogram(int id); 561 562 static void muteForInspector(); 563 static void unmuteForInspector(); 564 565 private: 566 static int m_muteCount; 567 568 bool recordMeasurement(Feature feature) 569 { 570 if (UseCounter::m_muteCount) 571 return false; 572 ASSERT(feature != PageDestruction); // PageDestruction is reserved as a scaling factor. 573 ASSERT(feature < NumberOfFeatures); 574 if (!m_countBits) { 575 m_countBits = adoptPtr(new BitVector(NumberOfFeatures)); 576 m_countBits->clearAll(); 577 } 578 579 if (m_countBits->quickGet(feature)) 580 return false; 581 582 m_countBits->quickSet(feature); 583 return true; 584 } 585 586 void updateMeasurements(); 587 588 OwnPtr<BitVector> m_countBits; 589 BitVector m_CSSFeatureBits; 590 }; 591 592 } // namespace blink 593 594 #endif // UseCounter_h 595
