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| 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 SKY_ENGINE_CORE_FRAME_USECOUNTER_H_ | |
| 27 #define SKY_ENGINE_CORE_FRAME_USECOUNTER_H_ | |
| 28 | |
| 29 #include "gen/sky/core/CSSPropertyNames.h" | |
| 30 #include "sky/engine/wtf/BitVector.h" | |
| 31 #include "sky/engine/wtf/Noncopyable.h" | |
| 32 #include "sky/engine/wtf/OwnPtr.h" | |
| 33 #include "sky/engine/wtf/PassOwnPtr.h" | |
| 34 #include "sky/engine/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 UnprefixedRequestAnimationFrame = 13, | |
| 70 PrefixedRequestAnimationFrame = 14, | |
| 71 | |
| 72 DataListElement = 23, | |
| 73 FormAttribute = 24, | |
| 74 IncrementalAttribute = 25, | |
| 75 InputTypeColor = 26, | |
| 76 InputTypeDate = 27, | |
| 77 InputTypeDateTimeFallback = 29, | |
| 78 InputTypeDateTimeLocal = 30, | |
| 79 InputTypeEmail = 31, | |
| 80 InputTypeMonth = 32, | |
| 81 InputTypeNumber = 33, | |
| 82 InputTypeRange = 34, | |
| 83 InputTypeSearch = 35, | |
| 84 InputTypeTel = 36, | |
| 85 InputTypeTime = 37, | |
| 86 InputTypeURL = 38, | |
| 87 InputTypeWeek = 39, | |
| 88 InputTypeWeekFallback = 40, | |
| 89 ListAttribute = 41, | |
| 90 MaxAttribute = 42, | |
| 91 MinAttribute = 43, | |
| 92 PatternAttribute = 44, | |
| 93 PlaceholderAttribute = 45, | |
| 94 PrefixedDirectoryAttribute = 47, | |
| 95 RequiredAttribute = 49, | |
| 96 ResultsAttribute = 50, | |
| 97 StepAttribute = 51, | |
| 98 PageVisits = 52, | |
| 99 PrefixedStorageInfo = 57, | |
| 100 XFrameOptions = 58, | |
| 101 XFrameOptionsSameOrigin = 59, | |
| 102 XFrameOptionsSameOriginWithBadAncestorChain = 60, | |
| 103 DeprecatedFlexboxWebContent = 61, | |
| 104 DeprecatedFlexboxChrome = 62, | |
| 105 DeprecatedFlexboxChromeExtension = 63, | |
| 106 UnprefixedPerformanceTimeline = 65, | |
| 107 UnprefixedUserTiming = 67, | |
| 108 WindowEvent = 69, | |
| 109 PrefixedMediaAddKey = 71, | |
| 110 PrefixedMediaGenerateKeyRequest = 72, | |
| 111 SVGFontElement = 76, | |
| 112 XMLDocument = 77, | |
| 113 SVGSwitchElement = 80, | |
| 114 DocumentAll = 83, | |
| 115 FormElement = 84, | |
| 116 DemotedFormElement = 85, | |
| 117 SVGAnimationElement = 90, | |
| 118 KeyboardEventKeyLocation = 91, | |
| 119 TextReplaceWholeText = 100, | |
| 120 ConsoleMarkTimeline = 102, | |
| 121 CSSPseudoElementUserAgentCustomPseudo = 103, | |
| 122 ElementGetAttributeNode = 107, // Removed from DOM4. | |
| 123 ElementSetAttributeNode = 108, // Removed from DOM4. | |
| 124 ElementRemoveAttributeNode = 109, // Removed from DOM4. | |
| 125 DocumentCreateAttribute = 111, // Removed from DOM4. | |
| 126 DocumentCreateAttributeNS = 112, // Removed from DOM4. | |
| 127 DocumentInputEncoding = 114, // Removed from DOM4. | |
| 128 DocumentXMLEncoding = 115, // Removed from DOM4. | |
| 129 DocumentXMLStandalone = 116, // Removed from DOM4. | |
| 130 NodeNamespaceURI = 120, // Removed from DOM4. | |
| 131 NodeLocalName = 122, // Removed from DOM4. | |
| 132 NavigatorProductSub = 123, | |
| 133 NavigatorVendor = 124, | |
| 134 NavigatorVendorSub = 125, | |
| 135 FileError = 126, | |
| 136 DocumentCharset = 127, // Documented as IE extensions = 0, from KHTML da
ys. | |
| 137 EventReturnValue = 137, // Legacy IE extension. | |
| 138 HasAttributes = 142, // Removed from DOM4. | |
| 139 DOMSubtreeModifiedEvent = 143, | |
| 140 DOMNodeInsertedEvent = 144, | |
| 141 DOMNodeRemovedEvent = 145, | |
| 142 DOMNodeRemovedFromDocumentEvent = 146, | |
| 143 DOMNodeInsertedIntoDocumentEvent = 147, | |
| 144 DOMCharacterDataModifiedEvent = 148, | |
| 145 DocumentAllLegacyCall = 150, | |
| 146 SVGFontInCSS = 156, | |
| 147 AttributeOwnerElement = 160, // Removed in DOM4. | |
| 148 AttributeSpecified = 162, // Removed in DOM4. | |
| 149 PrefixedAudioDecodedByteCount = 164, | |
| 150 PrefixedElementRequestFullscreen = 176, | |
| 151 PrefixedElementRequestFullScreen = 177, | |
| 152 InputTypeEmailMultiple = 184, | |
| 153 InputTypeEmailMaxLength = 185, | |
| 154 InputTypeEmailMultipleMaxLength = 186, | |
| 155 InputTypeText = 190, | |
| 156 InputTypeTextMaxLength = 191, | |
| 157 InputTypePassword = 192, | |
| 158 InputTypePasswordMaxLength = 193, | |
| 159 PrefixedPageVisibility = 196, | |
| 160 CSSStyleSheetInsertRuleOptionalArg = 198, // Inconsistent with the speci
fication and other browsers. | |
| 161 DocumentUnloadRegistered = 202, | |
| 162 DocumentUnloadFired = 203, | |
| 163 SVGLocatableNearestViewportElement = 204, | |
| 164 SVGLocatableFarthestViewportElement = 205, | |
| 165 HTMLHeadElementProfile = 207, | |
| 166 SVGPointMatrixTransform = 209, | |
| 167 DOMFocusInOutEvent = 211, | |
| 168 FileGetLastModifiedDate = 212, | |
| 169 ElementPrefixedMatchesSelector = 217, | |
| 170 CSSStyleSheetRules = 219, | |
| 171 CSSStyleSheetAddRule = 220, | |
| 172 CSSStyleSheetRemoveRule = 221, | |
| 173 // The above items are available in M33 branch. | |
| 174 | |
| 175 InitMessageEvent = 222, | |
| 176 ElementSetPrefix = 224, // Element.prefix is readonly in DOM4. | |
| 177 CSSStyleDeclarationGetPropertyCSSValue = 225, | |
| 178 PrefixedMediaCancelKeyRequest = 229, | |
| 179 CanPlayTypeKeySystem = 232, | |
| 180 PrefixedDevicePixelRatioMediaFeature = 233, | |
| 181 PrefixedMaxDevicePixelRatioMediaFeature = 234, | |
| 182 PrefixedMinDevicePixelRatioMediaFeature = 235, | |
| 183 PrefixedTransform3dMediaFeature = 237, | |
| 184 PrefixedStorageQuota = 240, | |
| 185 ResetReferrerPolicy = 243, | |
| 186 CaseInsensitiveAttrSelectorMatch = 244, // Case-insensitivity dropped fr
om specification. | |
| 187 FormNameAccessForImageElement = 246, | |
| 188 FormNameAccessForPastNamesMap = 247, | |
| 189 FormAssociationByParser = 248, | |
| 190 WebSocketURL = 255, | |
| 191 WorkerAllowedByChildBlockedByScript = 258, | |
| 192 DeprecatedWebKitGradient = 260, | |
| 193 DeprecatedWebKitLinearGradient = 261, | |
| 194 DeprecatedWebKitRepeatingLinearGradient = 262, | |
| 195 DeprecatedWebKitRadialGradient = 263, | |
| 196 DeprecatedWebKitRepeatingRadialGradient = 264, | |
| 197 PrefixedImageSmoothingEnabled = 267, | |
| 198 UnprefixedImageSmoothingEnabled = 268, | |
| 199 // The above items are available in M34 branch. | |
| 200 | |
| 201 TextAutosizing = 274, | |
| 202 HTMLAnchorElementPingAttribute = 276, | |
| 203 SVGClassName = 279, | |
| 204 PrefixedWindowURL = 283, | |
| 205 PrefixedWorkerURL = 284, // This didn't work because of crbug.com/376039
. Available since M37. | |
| 206 WindowOrientation = 285, | |
| 207 | |
| 208 DocumentCaptureEvents = 287, | |
| 209 DocumentReleaseEvents = 288, | |
| 210 WindowCaptureEvents = 289, | |
| 211 WindowReleaseEvents = 290, | |
| 212 PrefixedGamepad = 291, | |
| 213 ElementAnimateKeyframeListEffectObjectTiming = 292, | |
| 214 ElementAnimateKeyframeListEffectDoubleTiming = 293, | |
| 215 ElementAnimateKeyframeListEffectNoTiming = 294, | |
| 216 AttrGetValue = 298, | |
| 217 AttrSetValue = 299, | |
| 218 AnimationConstructorKeyframeListEffectObjectTiming = 300, | |
| 219 AnimationConstructorKeyframeListEffectDoubleTiming = 301, | |
| 220 AnimationConstructorKeyframeListEffectNoTiming = 302, | |
| 221 AttrSetValueWithElement = 303, | |
| 222 PrefixedCancelAnimationFrame = 304, | |
| 223 PrefixedCancelRequestAnimationFrame = 305, | |
| 224 | |
| 225 XHRProgressEventPosition = 316, | |
| 226 XHRProgressEventTotalSize = 317, | |
| 227 PrefixedDocumentIsFullscreen = 318, | |
| 228 PrefixedDocumentFullScreenKeyboardInputAllowed = 319, | |
| 229 PrefixedDocumentCurrentFullScreenElement = 320, | |
| 230 PrefixedDocumentCancelFullScreen = 321, | |
| 231 PrefixedDocumentFullscreenEnabled = 322, | |
| 232 PrefixedDocumentFullscreenElement = 323, | |
| 233 PrefixedDocumentExitFullscreen = 324, | |
| 234 // The above items are available in M35 branch. | |
| 235 | |
| 236 SVGForeignObjectElement = 325, | |
| 237 SelectionSetPosition = 327, | |
| 238 AnimationPlayerFinishEvent = 328, | |
| 239 // TODO(sky): 329, 330 Unused | |
| 240 CanvasRenderingContext2DSetCompositeOperation = 331, | |
| 241 CanvasRenderingContext2DSetLineWidth = 332, | |
| 242 CanvasRenderingContext2DSetLineCap = 333, | |
| 243 CanvasRenderingContext2DSetLineJoin = 334, | |
| 244 CanvasRenderingContext2DSetMiterLimit = 335, | |
| 245 CanvasRenderingContext2DClearShadow = 336, | |
| 246 CanvasRenderingContext2DSetStrokeColor = 337, | |
| 247 CanvasRenderingContext2DSetFillColor = 338, | |
| 248 CanvasRenderingContext2DDrawImageFromRect = 339, | |
| 249 CanvasRenderingContext2DSetShadow = 340, | |
| 250 PrefixedPerformanceClearResourceTimings = 341, | |
| 251 PrefixedPerformanceSetResourceTimingBufferSize = 342, | |
| 252 EventSrcElement = 343, | |
| 253 EventCancelBubble = 344, | |
| 254 EventPath = 345, | |
| 255 EventClipboardData = 346, | |
| 256 AttrTextContent = 349, | |
| 257 EventGetReturnValueTrue = 350, | |
| 258 EventGetReturnValueFalse = 351, | |
| 259 EventSetReturnValueTrue = 352, | |
| 260 EventSetReturnValueFalse = 353, | |
| 261 WindowOffscreenBuffering = 356, | |
| 262 WindowDefaultStatus = 357, | |
| 263 WindowDefaultstatus = 358, | |
| 264 PrefixedTransitionEventConstructor = 361, | |
| 265 PrefixedMutationObserverConstructor = 362, | |
| 266 PrefixedIDBCursorConstructor = 363, | |
| 267 PrefixedIDBDatabaseConstructor = 364, | |
| 268 PrefixedIDBFactoryConstructor = 365, | |
| 269 PrefixedIDBIndexConstructor = 366, | |
| 270 PrefixedIDBKeyRangeConstructor = 367, | |
| 271 PrefixedIDBObjectStoreConstructor = 368, | |
| 272 PrefixedIDBRequestConstructor = 369, | |
| 273 PrefixedIDBTransactionConstructor = 370, | |
| 274 NotificationPermission = 371, | |
| 275 RangeDetach = 372, | |
| 276 PrefixedTouchRadiusX = 378, | |
| 277 PrefixedTouchRadiusY = 379, | |
| 278 PrefixedTouchRotationAngle = 380, | |
| 279 PrefixedTouchForce = 381, | |
| 280 PrefixedMouseEventMovementX = 382, | |
| 281 PrefixedMouseEventMovementY = 383, | |
| 282 PrefixedFileRelativePath = 386, | |
| 283 DocumentCaretRangeFromPoint = 387, | |
| 284 DocumentGetCSSCanvasContext = 388, | |
| 285 ElementScrollIntoViewIfNeeded = 389, | |
| 286 RangeCompareNode = 392, | |
| 287 RangeExpand = 393, | |
| 288 HTMLImageElementX = 396, | |
| 289 HTMLImageElementY = 397, | |
| 290 SelectionBaseNode = 400, | |
| 291 SelectionBaseOffset = 401, | |
| 292 SelectionExtentNode = 402, | |
| 293 SelectionExtentOffset = 403, | |
| 294 SelectionType = 404, | |
| 295 SelectionModify = 405, | |
| 296 SelectionSetBaseAndExtent = 406, | |
| 297 SelectionEmpty = 407, | |
| 298 // The above items are available in M36 branch. | |
| 299 | |
| 300 PostMessageFromSecureToInsecure = 419, | |
| 301 PostMessageFromInsecureToSecure = 420, | |
| 302 PrefixedCursorZoomIn = 424, | |
| 303 PrefixedCursorZoomOut = 425, | |
| 304 CSSCharsetRuleEncoding = 426, | |
| 305 DocumentSetCharset = 427, | |
| 306 DocumentDefaultCharset = 428, | |
| 307 TextEncoderConstructor = 429, | |
| 308 TextEncoderEncode = 430, | |
| 309 TextDecoderConstructor = 431, | |
| 310 TextDecoderDecode = 432, | |
| 311 FocusInOutEvent = 433, | |
| 312 MouseEventMovementX = 434, | |
| 313 MouseEventMovementY = 435, | |
| 314 MixedContentRaw = 437, | |
| 315 MixedContentImage = 438, | |
| 316 MixedContentMedia = 439, | |
| 317 DocumentFonts = 440, | |
| 318 MixedContentFormsSubmitted = 441, | |
| 319 FormsSubmitted = 442, | |
| 320 TextInputEventOnInput = 443, | |
| 321 TextInputEventOnTextArea = 444, | |
| 322 TextInputEventOnContentEditable = 445, | |
| 323 TextInputEventOnNotNode = 446, | |
| 324 WebkitBeforeTextInsertedOnInput = 447, | |
| 325 WebkitBeforeTextInsertedOnTextArea = 448, | |
| 326 WebkitBeforeTextInsertedOnContentEditable = 449, | |
| 327 WebkitBeforeTextInsertedOnNotNode = 450, | |
| 328 WebkitEditableContentChangedOnInput = 451, | |
| 329 WebkitEditableContentChangedOnTextArea = 452, | |
| 330 WebkitEditableContentChangedOnContentEditable = 453, | |
| 331 WebkitEditableContentChangedOnNotNode = 454, | |
| 332 HTMLImports = 455, | |
| 333 ElementCreateShadowRoot = 456, | |
| 334 DocumentRegisterElement = 457, | |
| 335 EditingAppleInterchangeNewline = 458, | |
| 336 EditingAppleConvertedSpace = 459, | |
| 337 EditingApplePasteAsQuotation = 460, | |
| 338 EditingAppleStyleSpanClass = 461, | |
| 339 EditingAppleTabSpanClass = 462, | |
| 340 HTMLImportsAsyncAttribute = 463, | |
| 341 FontFaceSetReady = 464, | |
| 342 | |
| 343 CSSSelectorPseudoHost = 469, | |
| 344 | |
| 345 CSSDeepCombinator = 471, | |
| 346 SyncXHRWithCredentials = 472, | |
| 347 // The above items are available in M37 branch. | |
| 348 | |
| 349 UseAsm = 473, | |
| 350 KeyEventNotAllowedInFullScreen = 474, | |
| 351 DOMWindowOpen = 475, | |
| 352 DOMWindowOpenFeatures = 476, | |
| 353 AspectRatioFlexItem = 479, | |
| 354 DetailsElement = 480, | |
| 355 DialogElement = 481, | |
| 356 MapElement = 482, | |
| 357 MeterElement = 483, | |
| 358 ProgressElement = 484, | |
| 359 PrefixedHTMLElementDropzone = 490, | |
| 360 WheelEventWheelDeltaX = 491, | |
| 361 WheelEventWheelDeltaY = 492, | |
| 362 WheelEventWheelDelta = 493, | |
| 363 SendBeacon = 494, | |
| 364 SendBeaconQuotaExceeded = 495, | |
| 365 SVGSMILElementInDocument = 501, | |
| 366 MouseEventOffsetX = 502, | |
| 367 MouseEventOffsetY = 503, | |
| 368 MouseEventX = 504, | |
| 369 MouseEventY = 505, | |
| 370 MouseEventFromElement = 506, | |
| 371 MouseEventToElement = 507, | |
| 372 RequestFileSystem = 508, | |
| 373 RequestFileSystemWorker = 509, | |
| 374 RequestFileSystemSyncWorker = 510, | |
| 375 UIEventLayerX = 511, | |
| 376 UIEventLayerY = 512, | |
| 377 UIEventPageX = 513, | |
| 378 UIEventPageY = 514, | |
| 379 BgPropertiesFixed = 515, | |
| 380 HTMLImageElementComposite = 516, | |
| 381 DevToolsConsoleTimeline = 517, | |
| 382 DevToolsConsoleProfile = 518, | |
| 383 PictureSourceSrc = 520, | |
| 384 // The above items are available in M38 branch. | |
| 385 | |
| 386 Picture = 521, | |
| 387 Sizes = 522, | |
| 388 SrcsetXDescriptor = 523, | |
| 389 SrcsetWDescriptor = 524, | |
| 390 SelectionContainsNode = 525, | |
| 391 // Add new features immediately above this line. Don't change assigned | |
| 392 // numbers of any item, and don't reuse removed slots. | |
| 393 // Also, run update_use_counter_feature_enum.py in chromium/src/tools/me
trics/histograms/ | |
| 394 // to update the UMA mapping. | |
| 395 NumberOfFeatures, // This enum value must be last. | |
| 396 }; | |
| 397 | |
| 398 // "count" sets the bit for this feature to 1. Repeated calls are ignored. | |
| 399 static void count(const Document&, Feature); | |
| 400 // This doesn't count for ExecutionContexts for shared workers and service | |
| 401 // workers. | |
| 402 static void count(const ExecutionContext*, Feature); | |
| 403 void count(CSSParserContext, CSSPropertyID); | |
| 404 void count(Feature); | |
| 405 | |
| 406 // "countDeprecation" sets the bit for this feature to 1, and sends a deprec
ation | |
| 407 // warning to the console. Repeated calls are ignored. | |
| 408 // | |
| 409 // Be considerate to developers' consoles: features should only send | |
| 410 // deprecation warnings when we're actively interested in removing them from | |
| 411 // the platform. | |
| 412 // | |
| 413 // The ExecutionContext* overload doesn't work for shared workers and | |
| 414 // service workers. | |
| 415 static void countDeprecation(const LocalDOMWindow*, Feature); | |
| 416 static void countDeprecation(ExecutionContext*, Feature); | |
| 417 static void countDeprecation(const Document&, Feature); | |
| 418 String deprecationMessage(Feature); | |
| 419 | |
| 420 void didCommitLoad(); | |
| 421 | |
| 422 static UseCounter* getFrom(const Document*); | |
| 423 static UseCounter* getFrom(const CSSStyleSheet*); | |
| 424 static UseCounter* getFrom(const StyleSheetContents*); | |
| 425 | |
| 426 static void muteForInspector(); | |
| 427 static void unmuteForInspector(); | |
| 428 | |
| 429 private: | |
| 430 static int m_muteCount; | |
| 431 | |
| 432 bool recordMeasurement(Feature feature) | |
| 433 { | |
| 434 if (UseCounter::m_muteCount) | |
| 435 return false; | |
| 436 ASSERT(feature != PageDestruction); // PageDestruction is reserved as a
scaling factor. | |
| 437 ASSERT(feature < NumberOfFeatures); | |
| 438 if (!m_countBits) { | |
| 439 m_countBits = adoptPtr(new BitVector(NumberOfFeatures)); | |
| 440 m_countBits->clearAll(); | |
| 441 } | |
| 442 | |
| 443 if (m_countBits->quickGet(feature)) | |
| 444 return false; | |
| 445 | |
| 446 m_countBits->quickSet(feature); | |
| 447 return true; | |
| 448 } | |
| 449 | |
| 450 void updateMeasurements(); | |
| 451 | |
| 452 OwnPtr<BitVector> m_countBits; | |
| 453 BitVector m_CSSFeatureBits; | |
| 454 }; | |
| 455 | |
| 456 } // namespace blink | |
| 457 | |
| 458 #endif // SKY_ENGINE_CORE_FRAME_USECOUNTER_H_ | |
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