/*
 * 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.
 */

#include "config.h"
#include "core/frame/UseCounter.h"

#include "core/css/CSSStyleSheet.h"
#include "core/css/StyleSheetContents.h"
#include "core/dom/Document.h"
#include "core/dom/ExecutionContext.h"
#include "core/frame/FrameConsole.h"
#include "core/frame/FrameHost.h"
#include "core/frame/LocalFrame.h"
#include "core/inspector/ConsoleMessage.h"
#include "core/workers/WorkerGlobalScope.h"
#include "public/platform/Platform.h"

namespace blink {

static int totalPagesMeasuredCSSSampleId() { return 1; }

int UseCounter::m_muteCount = 0;

// FIXME : This mapping should be autogenerated. This function should
//         be moved to a separate file and a script run at build time
//         to detect new values in CSSPropertyID and add them to the
//         end of this function. This file would be checked in.
//         https://code.google.com/p/chromium/issues/detail?id=234940
int UseCounter::mapCSSPropertyIdToCSSSampleIdForHistogram(int id)
{
    CSSPropertyID cssPropertyID = static_cast<CSSPropertyID>(id);

    switch (cssPropertyID) {
    // Begin at 2, because 1 is reserved for totalPagesMeasuredCSSSampleId.
    case CSSPropertyColor: return 2;
    case CSSPropertyDirection: return 3;
    case CSSPropertyDisplay: return 4;
    case CSSPropertyFont: return 5;
    case CSSPropertyFontFamily: return 6;
    case CSSPropertyFontSize: return 7;
    case CSSPropertyFontStyle: return 8;
    case CSSPropertyFontVariant: return 9;
    case CSSPropertyFontWeight: return 10;
    case CSSPropertyTextRendering: return 11;
    case CSSPropertyWebkitFontFeatureSettings: return 12;
    case CSSPropertyFontKerning: return 13;
    case CSSPropertyWebkitFontSmoothing: return 14;
    case CSSPropertyFontVariantLigatures: return 15;
    case CSSPropertyWebkitLocale: return 16;
    case CSSPropertyWebkitTextOrientation: return 17;
    case CSSPropertyWebkitWritingMode: return 18;
    case CSSPropertyZoom: return 19;
    case CSSPropertyLineHeight: return 20;
    case CSSPropertyBackground: return 21;
    case CSSPropertyBackgroundAttachment: return 22;
    case CSSPropertyBackgroundClip: return 23;
    case CSSPropertyBackgroundColor: return 24;
    case CSSPropertyBackgroundImage: return 25;
    case CSSPropertyBackgroundOrigin: return 26;
    case CSSPropertyBackgroundPosition: return 27;
    case CSSPropertyBackgroundPositionX: return 28;
    case CSSPropertyBackgroundPositionY: return 29;
    case CSSPropertyBackgroundRepeat: return 30;
    case CSSPropertyBackgroundRepeatX: return 31;
    case CSSPropertyBackgroundRepeatY: return 32;
    case CSSPropertyBackgroundSize: return 33;
    case CSSPropertyBorder: return 34;
    case CSSPropertyBorderBottom: return 35;
    case CSSPropertyBorderBottomColor: return 36;
    case CSSPropertyBorderBottomLeftRadius: return 37;
    case CSSPropertyBorderBottomRightRadius: return 38;
    case CSSPropertyBorderBottomStyle: return 39;
    case CSSPropertyBorderBottomWidth: return 40;
    case CSSPropertyBorderCollapse: return 41;
    case CSSPropertyBorderColor: return 42;
    case CSSPropertyBorderImage: return 43;
    case CSSPropertyBorderImageOutset: return 44;
    case CSSPropertyBorderImageRepeat: return 45;
    case CSSPropertyBorderImageSlice: return 46;
    case CSSPropertyBorderImageSource: return 47;
    case CSSPropertyBorderImageWidth: return 48;
    case CSSPropertyBorderLeft: return 49;
    case CSSPropertyBorderLeftColor: return 50;
    case CSSPropertyBorderLeftStyle: return 51;
    case CSSPropertyBorderLeftWidth: return 52;
    case CSSPropertyBorderRadius: return 53;
    case CSSPropertyBorderRight: return 54;
    case CSSPropertyBorderRightColor: return 55;
    case CSSPropertyBorderRightStyle: return 56;
    case CSSPropertyBorderRightWidth: return 57;
    case CSSPropertyBorderSpacing: return 58;
    case CSSPropertyBorderStyle: return 59;
    case CSSPropertyBorderTop: return 60;
    case CSSPropertyBorderTopColor: return 61;
    case CSSPropertyBorderTopLeftRadius: return 62;
    case CSSPropertyBorderTopRightRadius: return 63;
    case CSSPropertyBorderTopStyle: return 64;
    case CSSPropertyBorderTopWidth: return 65;
    case CSSPropertyBorderWidth: return 66;
    case CSSPropertyBottom: return 67;
    case CSSPropertyBoxShadow: return 68;
    case CSSPropertyBoxSizing: return 69;
    case CSSPropertyCaptionSide: return 70;
    case CSSPropertyClear: return 71;
    case CSSPropertyClip: return 72;
    case CSSPropertyWebkitClipPath: return 73;
    case CSSPropertyContent: return 74;
    case CSSPropertyCounterIncrement: return 75;
    case CSSPropertyCounterReset: return 76;
    case CSSPropertyCursor: return 77;
    case CSSPropertyEmptyCells: return 78;
    case CSSPropertyFloat: return 79;
    case CSSPropertyFontStretch: return 80;
    case CSSPropertyHeight: return 81;
    case CSSPropertyImageRendering: return 82;
    case CSSPropertyLeft: return 83;
    case CSSPropertyLetterSpacing: return 84;
    case CSSPropertyListStyle: return 85;
    case CSSPropertyListStyleImage: return 86;
    case CSSPropertyListStylePosition: return 87;
    case CSSPropertyListStyleType: return 88;
    case CSSPropertyMargin: return 89;
    case CSSPropertyMarginBottom: return 90;
    case CSSPropertyMarginLeft: return 91;
    case CSSPropertyMarginRight: return 92;
    case CSSPropertyMarginTop: return 93;
    case CSSPropertyMaxHeight: return 94;
    case CSSPropertyMaxWidth: return 95;
    case CSSPropertyMinHeight: return 96;
    case CSSPropertyMinWidth: return 97;
    case CSSPropertyOpacity: return 98;
    case CSSPropertyOrphans: return 99;
    case CSSPropertyOutline: return 100;
    case CSSPropertyOutlineColor: return 101;
    case CSSPropertyOutlineOffset: return 102;
    case CSSPropertyOutlineStyle: return 103;
    case CSSPropertyOutlineWidth: return 104;
    case CSSPropertyOverflow: return 105;
    case CSSPropertyOverflowWrap: return 106;
    case CSSPropertyOverflowX: return 107;
    case CSSPropertyOverflowY: return 108;
    case CSSPropertyPadding: return 109;
    case CSSPropertyPaddingBottom: return 110;
    case CSSPropertyPaddingLeft: return 111;
    case CSSPropertyPaddingRight: return 112;
    case CSSPropertyPaddingTop: return 113;
    case CSSPropertyPage: return 114;
    case CSSPropertyPageBreakAfter: return 115;
    case CSSPropertyPageBreakBefore: return 116;
    case CSSPropertyPageBreakInside: return 117;
    case CSSPropertyPointerEvents: return 118;
    case CSSPropertyPosition: return 119;
    case CSSPropertyQuotes: return 120;
    case CSSPropertyResize: return 121;
    case CSSPropertyRight: return 122;
    case CSSPropertySize: return 123;
    case CSSPropertySrc: return 124;
    case CSSPropertySpeak: return 125;
    case CSSPropertyTableLayout: return 126;
    case CSSPropertyTabSize: return 127;
    case CSSPropertyTextAlign: return 128;
    case CSSPropertyTextDecoration: return 129;
    case CSSPropertyTextIndent: return 130;
    /* Removed CSSPropertyTextLineThrough* - 131-135 */
    case CSSPropertyTextOverflow: return 136;
    /* Removed CSSPropertyTextOverline* - 137-141 */
    case CSSPropertyTextShadow: return 142;
    case CSSPropertyTextTransform: return 143;
    /* Removed CSSPropertyTextUnderline* - 144-148 */
    case CSSPropertyTop: return 149;
    case CSSPropertyTransition: return 150;
    case CSSPropertyTransitionDelay: return 151;
    case CSSPropertyTransitionDuration: return 152;
    case CSSPropertyTransitionProperty: return 153;
    case CSSPropertyTransitionTimingFunction: return 154;
    case CSSPropertyUnicodeBidi: return 155;
    case CSSPropertyUnicodeRange: return 156;
    case CSSPropertyVerticalAlign: return 157;
    case CSSPropertyVisibility: return 158;
    case CSSPropertyWhiteSpace: return 159;
    case CSSPropertyWidows: return 160;
    case CSSPropertyWidth: return 161;
    case CSSPropertyWordBreak: return 162;
    case CSSPropertyWordSpacing: return 163;
    case CSSPropertyWordWrap: return 164;
    case CSSPropertyZIndex: return 165;
    case CSSPropertyAliasWebkitAnimation: return 166;
    case CSSPropertyAliasWebkitAnimationDelay: return 167;
    case CSSPropertyAliasWebkitAnimationDirection: return 168;
    case CSSPropertyAliasWebkitAnimationDuration: return 169;
    case CSSPropertyAliasWebkitAnimationFillMode: return 170;
    case CSSPropertyAliasWebkitAnimationIterationCount: return 171;
    case CSSPropertyAliasWebkitAnimationName: return 172;
    case CSSPropertyAliasWebkitAnimationPlayState: return 173;
    case CSSPropertyAliasWebkitAnimationTimingFunction: return 174;
    case CSSPropertyWebkitAppearance: return 175;
    // CSSPropertyWebkitAspectRatio was 176
    case CSSPropertyAliasWebkitBackfaceVisibility: return 177;
    case CSSPropertyWebkitBackgroundClip: return 178;
    case CSSPropertyWebkitBackgroundComposite: return 179;
    case CSSPropertyWebkitBackgroundOrigin: return 180;
    case CSSPropertyAliasWebkitBackgroundSize: return 181;
    case CSSPropertyWebkitBorderAfter: return 182;
    case CSSPropertyWebkitBorderAfterColor: return 183;
    case CSSPropertyWebkitBorderAfterStyle: return 184;
    case CSSPropertyWebkitBorderAfterWidth: return 185;
    case CSSPropertyWebkitBorderBefore: return 186;
    case CSSPropertyWebkitBorderBeforeColor: return 187;
    case CSSPropertyWebkitBorderBeforeStyle: return 188;
    case CSSPropertyWebkitBorderBeforeWidth: return 189;
    case CSSPropertyWebkitBorderEnd: return 190;
    case CSSPropertyWebkitBorderEndColor: return 191;
    case CSSPropertyWebkitBorderEndStyle: return 192;
    case CSSPropertyWebkitBorderEndWidth: return 193;
    // CSSPropertyWebkitBorderFit was 194
    case CSSPropertyWebkitBorderHorizontalSpacing: return 195;
    case CSSPropertyWebkitBorderImage: return 196;
    case CSSPropertyAliasWebkitBorderRadius: return 197;
    case CSSPropertyWebkitBorderStart: return 198;
    case CSSPropertyWebkitBorderStartColor: return 199;
    case CSSPropertyWebkitBorderStartStyle: return 200;
    case CSSPropertyWebkitBorderStartWidth: return 201;
    case CSSPropertyWebkitBorderVerticalSpacing: return 202;
    case CSSPropertyWebkitBoxAlign: return 203;
    case CSSPropertyWebkitBoxDirection: return 204;
    case CSSPropertyWebkitBoxFlex: return 205;
    case CSSPropertyWebkitBoxFlexGroup: return 206;
    case CSSPropertyWebkitBoxLines: return 207;
    case CSSPropertyWebkitBoxOrdinalGroup: return 208;
    case CSSPropertyWebkitBoxOrient: return 209;
    case CSSPropertyWebkitBoxPack: return 210;
    case CSSPropertyWebkitBoxReflect: return 211;
    case CSSPropertyAliasWebkitBoxShadow: return 212;
    // CSSPropertyWebkitColumnAxis was 214
    case CSSPropertyWebkitColumnBreakAfter: return 215;
    case CSSPropertyWebkitColumnBreakBefore: return 216;
    case CSSPropertyWebkitColumnBreakInside: return 217;
    case CSSPropertyWebkitColumnCount: return 218;
    case CSSPropertyWebkitColumnGap: return 219;
    // CSSPropertyWebkitColumnProgression was 220
    case CSSPropertyWebkitColumnRule: return 221;
    case CSSPropertyWebkitColumnRuleColor: return 222;
    case CSSPropertyWebkitColumnRuleStyle: return 223;
    case CSSPropertyWebkitColumnRuleWidth: return 224;
    case CSSPropertyWebkitColumnSpan: return 225;
    case CSSPropertyWebkitColumnWidth: return 226;
    case CSSPropertyWebkitColumns: return 227;
    // 228 was CSSPropertyWebkitBoxDecorationBreak (duplicated due to #ifdef).
    // 229 was CSSPropertyWebkitFilter (duplicated due to #ifdef).
    case CSSPropertyAlignContent: return 230;
    case CSSPropertyAlignItems: return 231;
    case CSSPropertyAlignSelf: return 232;
    case CSSPropertyFlex: return 233;
    case CSSPropertyFlexBasis: return 234;
    case CSSPropertyFlexDirection: return 235;
    case CSSPropertyFlexFlow: return 236;
    case CSSPropertyFlexGrow: return 237;
    case CSSPropertyFlexShrink: return 238;
    case CSSPropertyFlexWrap: return 239;
    case CSSPropertyJustifyContent: return 240;
    case CSSPropertyWebkitFontSizeDelta: return 241;
    case CSSPropertyGridTemplateColumns: return 242;
    case CSSPropertyGridTemplateRows: return 243;
    case CSSPropertyGridColumnStart: return 244;
    case CSSPropertyGridColumnEnd: return 245;
    case CSSPropertyGridRowStart: return 246;
    case CSSPropertyGridRowEnd: return 247;
    case CSSPropertyGridColumn: return 248;
    case CSSPropertyGridRow: return 249;
    case CSSPropertyGridAutoFlow: return 250;
    case CSSPropertyWebkitHighlight: return 251;
    case CSSPropertyWebkitHyphenateCharacter: return 252;
    case CSSPropertyWebkitLineBoxContain: return 257;
    // case CSSPropertyWebkitLineAlign: return 258;
    case CSSPropertyWebkitLineBreak: return 259;
    case CSSPropertyWebkitLineClamp: return 260;
    // case CSSPropertyWebkitLineGrid: return 261;
    // case CSSPropertyWebkitLineSnap: return 262;
    case CSSPropertyWebkitLogicalWidth: return 263;
    case CSSPropertyWebkitLogicalHeight: return 264;
    case CSSPropertyWebkitMarginAfterCollapse: return 265;
    case CSSPropertyWebkitMarginBeforeCollapse: return 266;
    case CSSPropertyWebkitMarginBottomCollapse: return 267;
    case CSSPropertyWebkitMarginTopCollapse: return 268;
    case CSSPropertyWebkitMarginCollapse: return 269;
    case CSSPropertyWebkitMarginAfter: return 270;
    case CSSPropertyWebkitMarginBefore: return 271;
    case CSSPropertyWebkitMarginEnd: return 272;
    case CSSPropertyWebkitMarginStart: return 273;
    // CSSPropertyWebkitMarquee was 274.
    // CSSPropertyInternalMarquee* were 275-279.
    case CSSPropertyWebkitMask: return 280;
    case CSSPropertyWebkitMaskBoxImage: return 281;
    case CSSPropertyWebkitMaskBoxImageOutset: return 282;
    case CSSPropertyWebkitMaskBoxImageRepeat: return 283;
    case CSSPropertyWebkitMaskBoxImageSlice: return 284;
    case CSSPropertyWebkitMaskBoxImageSource: return 285;
    case CSSPropertyWebkitMaskBoxImageWidth: return 286;
    case CSSPropertyWebkitMaskClip: return 287;
    case CSSPropertyWebkitMaskComposite: return 288;
    case CSSPropertyWebkitMaskImage: return 289;
    case CSSPropertyWebkitMaskOrigin: return 290;
    case CSSPropertyWebkitMaskPosition: return 291;
    case CSSPropertyWebkitMaskPositionX: return 292;
    case CSSPropertyWebkitMaskPositionY: return 293;
    case CSSPropertyWebkitMaskRepeat: return 294;
    case CSSPropertyWebkitMaskRepeatX: return 295;
    case CSSPropertyWebkitMaskRepeatY: return 296;
    case CSSPropertyWebkitMaskSize: return 297;
    case CSSPropertyWebkitMaxLogicalWidth: return 298;
    case CSSPropertyWebkitMaxLogicalHeight: return 299;
    case CSSPropertyWebkitMinLogicalWidth: return 300;
    case CSSPropertyWebkitMinLogicalHeight: return 301;
    // WebkitNbspMode has been deleted, was return 302;
    case CSSPropertyOrder: return 303;
    case CSSPropertyWebkitPaddingAfter: return 304;
    case CSSPropertyWebkitPaddingBefore: return 305;
    case CSSPropertyWebkitPaddingEnd: return 306;
    case CSSPropertyWebkitPaddingStart: return 307;
    case CSSPropertyAliasWebkitPerspective: return 308;
    case CSSPropertyAliasWebkitPerspectiveOrigin: return 309;
    case CSSPropertyWebkitPerspectiveOriginX: return 310;
    case CSSPropertyWebkitPerspectiveOriginY: return 311;
    case CSSPropertyWebkitPrintColorAdjust: return 312;
    case CSSPropertyWebkitRtlOrdering: return 313;
    case CSSPropertyWebkitRubyPosition: return 314;
    case CSSPropertyWebkitTextCombine: return 315;
    case CSSPropertyWebkitTextDecorationsInEffect: return 316;
    case CSSPropertyWebkitTextEmphasis: return 317;
    case CSSPropertyWebkitTextEmphasisColor: return 318;
    case CSSPropertyWebkitTextEmphasisPosition: return 319;
    case CSSPropertyWebkitTextEmphasisStyle: return 320;
    case CSSPropertyWebkitTextFillColor: return 321;
    case CSSPropertyWebkitTextSecurity: return 322;
    case CSSPropertyWebkitTextStroke: return 323;
    case CSSPropertyWebkitTextStrokeColor: return 324;
    case CSSPropertyWebkitTextStrokeWidth: return 325;
    case CSSPropertyAliasWebkitTransform: return 326;
    case CSSPropertyAliasWebkitTransformOrigin: return 327;
    case CSSPropertyWebkitTransformOriginX: return 328;
    case CSSPropertyWebkitTransformOriginY: return 329;
    case CSSPropertyWebkitTransformOriginZ: return 330;
    case CSSPropertyAliasWebkitTransformStyle: return 331;
    case CSSPropertyAliasWebkitTransition: return 332;
    case CSSPropertyAliasWebkitTransitionDelay: return 333;
    case CSSPropertyAliasWebkitTransitionDuration: return 334;
    case CSSPropertyAliasWebkitTransitionProperty: return 335;
    case CSSPropertyAliasWebkitTransitionTimingFunction: return 336;
    case CSSPropertyWebkitUserDrag: return 337;
    case CSSPropertyWebkitUserModify: return 338;
    case CSSPropertyWebkitUserSelect: return 339;
    // case CSSPropertyWebkitFlowInto: return 340;
    // case CSSPropertyWebkitFlowFrom: return 341;
    // case CSSPropertyWebkitRegionFragment: return 342;
    // case CSSPropertyWebkitRegionBreakAfter: return 343;
    // case CSSPropertyWebkitRegionBreakBefore: return 344;
    // case CSSPropertyWebkitRegionBreakInside: return 345;
    // case CSSPropertyShapeInside: return 346;
    case CSSPropertyShapeOutside: return 347;
    case CSSPropertyShapeMargin: return 348;
    // case CSSPropertyShapePadding: return 349;
    // case CSSPropertyWebkitWrapFlow: return 350;
    // case CSSPropertyWebkitWrapThrough: return 351;
    // CSSPropertyWebkitWrap was 352.
    // 353 was CSSPropertyWebkitTapHighlightColor (duplicated due to #ifdef).
    // 354 was CSSPropertyWebkitAppRegion (duplicated due to #ifdef).
    case CSSPropertyClipPath: return 355;
    case CSSPropertyClipRule: return 356;
    case CSSPropertyMask: return 357;
    // CSSPropertyEnableBackground has been removed, was return 358;
    case CSSPropertyFilter: return 359;
    case CSSPropertyFloodColor: return 360;
    case CSSPropertyFloodOpacity: return 361;
    case CSSPropertyLightingColor: return 362;
    case CSSPropertyStopColor: return 363;
    case CSSPropertyStopOpacity: return 364;
    case CSSPropertyColorInterpolation: return 365;
    case CSSPropertyColorInterpolationFilters: return 366;
    // case CSSPropertyColorProfile: return 367;
    case CSSPropertyColorRendering: return 368;
    case CSSPropertyFill: return 369;
    case CSSPropertyFillOpacity: return 370;
    case CSSPropertyFillRule: return 371;
    case CSSPropertyMarker: return 372;
    case CSSPropertyMarkerEnd: return 373;
    case CSSPropertyMarkerMid: return 374;
    case CSSPropertyMarkerStart: return 375;
    case CSSPropertyMaskType: return 376;
    case CSSPropertyShapeRendering: return 377;
    case CSSPropertyStroke: return 378;
    case CSSPropertyStrokeDasharray: return 379;
    case CSSPropertyStrokeDashoffset: return 380;
    case CSSPropertyStrokeLinecap: return 381;
    case CSSPropertyStrokeLinejoin: return 382;
    case CSSPropertyStrokeMiterlimit: return 383;
    case CSSPropertyStrokeOpacity: return 384;
    case CSSPropertyStrokeWidth: return 385;
    case CSSPropertyAlignmentBaseline: return 386;
    case CSSPropertyBaselineShift: return 387;
    case CSSPropertyDominantBaseline: return 388;
    case CSSPropertyGlyphOrientationHorizontal: return 389;
    case CSSPropertyGlyphOrientationVertical: return 390;
    // CSSPropertyKerning has been removed, was return 391;
    case CSSPropertyTextAnchor: return 392;
    case CSSPropertyVectorEffect: return 393;
    case CSSPropertyWritingMode: return 394;
    // CSSPropertyWebkitSvgShadow has been removed, was return 395;
    // CSSPropertyWebkitCursorVisibility has been removed, was return 396;
    // CSSPropertyImageOrientation has been removed, was return 397;
    // CSSPropertyImageResolution has been removed, was return 398;
#if defined(ENABLE_CSS_COMPOSITING) && ENABLE_CSS_COMPOSITING
    case CSSPropertyWebkitBlendMode: return 399;
    case CSSPropertyWebkitBackgroundBlendMode: return 400;
#endif
    case CSSPropertyTextDecorationLine: return 401;
    case CSSPropertyTextDecorationStyle: return 402;
    case CSSPropertyTextDecorationColor: return 403;
    case CSSPropertyTextAlignLast: return 404;
    case CSSPropertyTextUnderlinePosition: return 405;
    case CSSPropertyMaxZoom: return 406;
    case CSSPropertyMinZoom: return 407;
    case CSSPropertyOrientation: return 408;
    case CSSPropertyUserZoom: return 409;
    // CSSPropertyWebkitDashboardRegion was 410.
    // CSSPropertyWebkitOverflowScrolling was 411.
    case CSSPropertyWebkitAppRegion: return 412;
    case CSSPropertyWebkitFilter: return 413;
    case CSSPropertyWebkitBoxDecorationBreak: return 414;
    case CSSPropertyWebkitTapHighlightColor: return 415;
    case CSSPropertyBufferedRendering: return 416;
    case CSSPropertyGridAutoRows: return 417;
    case CSSPropertyGridAutoColumns: return 418;
    case CSSPropertyBackgroundBlendMode: return 419;
    case CSSPropertyMixBlendMode: return 420;
    case CSSPropertyTouchAction: return 421;
    case CSSPropertyGridArea: return 422;
    case CSSPropertyGridTemplateAreas: return 423;
    case CSSPropertyAnimation: return 424;
    case CSSPropertyAnimationDelay: return 425;
    case CSSPropertyAnimationDirection: return 426;
    case CSSPropertyAnimationDuration: return 427;
    case CSSPropertyAnimationFillMode: return 428;
    case CSSPropertyAnimationIterationCount: return 429;
    case CSSPropertyAnimationName: return 430;
    case CSSPropertyAnimationPlayState: return 431;
    case CSSPropertyAnimationTimingFunction: return 432;
    case CSSPropertyObjectFit: return 433;
    case CSSPropertyPaintOrder: return 434;
    case CSSPropertyMaskSourceType: return 435;
    case CSSPropertyIsolation: return 436;
    case CSSPropertyObjectPosition: return 437;
    // case CSSPropertyInternalCallback: return 438;
    case CSSPropertyShapeImageThreshold: return 439;
    case CSSPropertyColumnFill: return 440;
    case CSSPropertyTextJustify: return 441;
    // CSSPropertyTouchActionDelay was 442
    case CSSPropertyJustifySelf: return 443;
    case CSSPropertyScrollBehavior: return 444;
    case CSSPropertyWillChange: return 445;
    case CSSPropertyTransform: return 446;
    case CSSPropertyTransformOrigin: return 447;
    case CSSPropertyTransformStyle: return 448;
    case CSSPropertyPerspective: return 449;
    case CSSPropertyPerspectiveOrigin: return 450;
    case CSSPropertyBackfaceVisibility: return 451;
    case CSSPropertyGridTemplate: return 452;
    case CSSPropertyGrid: return 453;
    case CSSPropertyAll: return 454;
    case CSSPropertyJustifyItems: return 455;
    case CSSPropertyMotionPath: return 457;
    case CSSPropertyMotionOffset: return 458;
    case CSSPropertyMotionRotation: return 459;
    case CSSPropertyMotion: return 460;
    case CSSPropertyX: return 461;
    case CSSPropertyY: return 462;
    case CSSPropertyRx: return 463;
    case CSSPropertyRy: return 464;
    case CSSPropertyFontSizeAdjust: return 465;
    case CSSPropertyCx: return 466;
    case CSSPropertyCy: return 467;
    case CSSPropertyR: return 468;
    case CSSPropertyAliasEpubCaptionSide: return 469;
    case CSSPropertyAliasEpubTextCombine: return 470;
    case CSSPropertyAliasEpubTextEmphasis: return 471;
    case CSSPropertyAliasEpubTextEmphasisColor: return 472;
    case CSSPropertyAliasEpubTextEmphasisStyle: return 473;
    case CSSPropertyAliasEpubTextOrientation: return 474;
    case CSSPropertyAliasEpubTextTransform: return 475;
    case CSSPropertyAliasEpubWordBreak: return 476;
    case CSSPropertyAliasEpubWritingMode: return 477;
    case CSSPropertyAliasWebkitAlignContent: return 478;
    case CSSPropertyAliasWebkitAlignItems: return 479;
    case CSSPropertyAliasWebkitAlignSelf: return 480;
    case CSSPropertyAliasWebkitBorderBottomLeftRadius: return 481;
    case CSSPropertyAliasWebkitBorderBottomRightRadius: return 482;
    case CSSPropertyAliasWebkitBorderTopLeftRadius: return 483;
    case CSSPropertyAliasWebkitBorderTopRightRadius: return 484;
    case CSSPropertyAliasWebkitBoxSizing: return 485;
    case CSSPropertyAliasWebkitFlex: return 486;
    case CSSPropertyAliasWebkitFlexBasis: return 487;
    case CSSPropertyAliasWebkitFlexDirection: return 488;
    case CSSPropertyAliasWebkitFlexFlow: return 489;
    case CSSPropertyAliasWebkitFlexGrow: return 490;
    case CSSPropertyAliasWebkitFlexShrink: return 491;
    case CSSPropertyAliasWebkitFlexWrap: return 492;
    case CSSPropertyAliasWebkitJustifyContent: return 493;
    case CSSPropertyAliasWebkitOpacity: return 494;
    case CSSPropertyAliasWebkitOrder: return 495;
    case CSSPropertyAliasWebkitShapeImageThreshold: return 496;
    case CSSPropertyAliasWebkitShapeMargin: return 497;
    case CSSPropertyAliasWebkitShapeOutside: return 498;
    case CSSPropertyScrollSnapType: return 499;
    case CSSPropertyScrollSnapPointsX: return 500;
    case CSSPropertyScrollSnapPointsY: return 501;
    case CSSPropertyScrollSnapCoordinate: return 502;
    case CSSPropertyScrollSnapDestination: return 503;
    case CSSPropertyTranslate: return 504;
    case CSSPropertyRotate: return 505;
    case CSSPropertyScale: return 506;
    case CSSPropertyImageOrientation: return 507;

    // 1. Add new features above this line (don't change the assigned numbers of the existing
    // items).
    // 2. Update maximumCSSSampleId() with the new maximum value.
    // 3. Run the update_use_counter_css.py script in
    // chromium/src/tools/metrics/histograms to update the UMA histogram names.

    case CSSPropertyInvalid:
        ASSERT_NOT_REACHED();
        return 0;
    }

    ASSERT_NOT_REACHED();
    return 0;
}

static int maximumCSSSampleId() { return 507; }

void UseCounter::muteForInspector()
{
    UseCounter::m_muteCount++;
}

void UseCounter::unmuteForInspector()
{
    UseCounter::m_muteCount--;
}

UseCounter::UseCounter()
{
    m_CSSFeatureBits.ensureSize(lastUnresolvedCSSProperty + 1);
    m_CSSFeatureBits.clearAll();
}

UseCounter::~UseCounter()
{
    // We always log PageDestruction so that we have a scale for the rest of the features.
    Platform::current()->histogramEnumeration("WebCore.FeatureObserver", PageDestruction, NumberOfFeatures);

    updateMeasurements();
}

void UseCounter::CountBits::updateMeasurements()
{
    for (unsigned i = 0; i < NumberOfFeatures; ++i) {
        if (m_bits.quickGet(i))
            Platform::current()->histogramEnumeration("WebCore.FeatureObserver", i, NumberOfFeatures);
    }
    // Clearing count bits is timing sensitive.
    m_bits.clearAll();
}

void UseCounter::updateMeasurements()
{
    Platform::current()->histogramEnumeration("WebCore.FeatureObserver", PageVisits, NumberOfFeatures);
    m_countBits.updateMeasurements();

    // FIXME: Sometimes this function is called more than once per page. The following
    //        bool guards against incrementing the page count when there are no CSS
    //        bits set. http://crbug.com/236262.
    bool needsPagesMeasuredUpdate = false;
    for (int i = firstCSSProperty; i <= lastUnresolvedCSSProperty; ++i) {
        if (m_CSSFeatureBits.quickGet(i)) {
            int cssSampleId = mapCSSPropertyIdToCSSSampleIdForHistogram(i);
            Platform::current()->histogramEnumeration("WebCore.FeatureObserver.CSSProperties", cssSampleId, maximumCSSSampleId());
            needsPagesMeasuredUpdate = true;
        }
    }

    if (needsPagesMeasuredUpdate)
        Platform::current()->histogramEnumeration("WebCore.FeatureObserver.CSSProperties", totalPagesMeasuredCSSSampleId(), maximumCSSSampleId());

    m_CSSFeatureBits.clearAll();
}

void UseCounter::didCommitLoad()
{
    updateMeasurements();
}

void UseCounter::count(const Frame* frame, Feature feature)
{
    if (!frame)
        return;
    FrameHost* host = frame->host();
    if (!host)
        return;

    ASSERT(deprecationMessage(feature).isEmpty());
    host->useCounter().recordMeasurement(feature);
}

void UseCounter::count(const Document& document, Feature feature)
{
    count(document.frame(), feature);
}

bool UseCounter::isCounted(Document& document, Feature feature)
{
    Frame* frame = document.frame();
    if (!frame)
        return false;
    FrameHost* host = frame->host();
    if (!host)
        return false;
    return host->useCounter().hasRecordedMeasurement(feature);
}

void UseCounter::count(const ExecutionContext* context, Feature feature)
{
    if (!context)
        return;
    if (context->isDocument()) {
        count(*toDocument(context), feature);
        return;
    }
    if (context->isWorkerGlobalScope())
        toWorkerGlobalScope(context)->countFeature(feature);
}

void UseCounter::countIfNotPrivateScript(v8::Isolate* isolate, const Frame* frame, Feature feature)
{
    if (DOMWrapperWorld::current(isolate).isPrivateScriptIsolatedWorld())
        return;
    UseCounter::count(frame, feature);
}

void UseCounter::countIfNotPrivateScript(v8::Isolate* isolate, const Document& document, Feature feature)
{
    if (DOMWrapperWorld::current(isolate).isPrivateScriptIsolatedWorld())
        return;
    UseCounter::count(document, feature);
}

void UseCounter::countIfNotPrivateScript(v8::Isolate* isolate, const ExecutionContext* context, Feature feature)
{
    if (DOMWrapperWorld::current(isolate).isPrivateScriptIsolatedWorld())
        return;
    UseCounter::count(context, feature);
}

void UseCounter::countDeprecation(const LocalFrame* frame, Feature feature)
{
    if (!frame)
        return;
    FrameHost* host = frame->host();
    if (!host)
        return;

    if (!host->useCounter().hasRecordedMeasurement(feature)) {
        host->useCounter().recordMeasurement(feature);
        ASSERT(!deprecationMessage(feature).isEmpty());
        frame->console().addMessage(ConsoleMessage::create(DeprecationMessageSource, WarningMessageLevel, deprecationMessage(feature)));
    }
}

void UseCounter::countDeprecation(ExecutionContext* context, Feature feature)
{
    if (!context)
        return;
    if (context->isDocument()) {
        UseCounter::countDeprecation(*toDocument(context), feature);
        return;
    }
    if (context->isWorkerGlobalScope())
        toWorkerGlobalScope(context)->countDeprecation(feature);
}

void UseCounter::countDeprecation(const Document& document, Feature feature)
{
    UseCounter::countDeprecation(document.frame(), feature);
}

void UseCounter::countDeprecationIfNotPrivateScript(v8::Isolate* isolate, ExecutionContext* context, Feature feature)
{
    if (DOMWrapperWorld::current(isolate).isPrivateScriptIsolatedWorld())
        return;
    UseCounter::countDeprecation(context, feature);
}

static String replacedBy(const char* oldString, const char* newString)
{
    return String::format("'%s' is deprecated. Please use '%s' instead.", oldString, newString);
}

String UseCounter::deprecationMessage(Feature feature)
{
    switch (feature) {
    // Quota
    case PrefixedStorageInfo:
        return "'window.webkitStorageInfo' is deprecated. Please use 'navigator.webkitTemporaryStorage' or 'navigator.webkitPersistentStorage' instead.";

    // Keyboard Event (DOM Level 3)
    case KeyboardEventKeyLocation:
        return replacedBy("KeyboardEvent.keyLocation", "KeyboardEvent.location");

    case ConsoleMarkTimeline:
        return replacedBy("console.markTimeline", "console.timeStamp");

    case FileError:
        return "FileError is deprecated. Please use the 'name' or 'message' attributes of DOMError rather than 'code'.";

    case CSSStyleSheetInsertRuleOptionalArg:
        return "Calling CSSStyleSheet.insertRule() with one argument is deprecated. Please pass the index argument as well: insertRule(x, 0).";

    case PrefixedVideoSupportsFullscreen:
        return "'HTMLVideoElement.webkitSupportsFullscreen' is deprecated. Its value is true if the video is loaded.";

    case PrefixedVideoDisplayingFullscreen:
        return "'HTMLVideoElement.webkitDisplayingFullscreen' is deprecated. Please use the 'fullscreenchange' event instead.";

    case PrefixedVideoEnterFullscreen:
        return replacedBy("HTMLVideoElement.webkitEnterFullscreen()", "Element.requestFullscreen()");

    case PrefixedVideoExitFullscreen:
        return replacedBy("HTMLVideoElement.webkitExitFullscreen()", "Document.exitFullscreen()");

    case PrefixedVideoEnterFullScreen:
        return replacedBy("HTMLVideoElement.webkitEnterFullScreen()", "Element.requestFullscreen()");

    case PrefixedVideoExitFullScreen:
        return replacedBy("HTMLVideoElement.webkitExitFullScreen()", "Document.exitFullscreen()");

    case PrefixedIndexedDB:
        return replacedBy("webkitIndexedDB", "indexedDB");

    case PrefixedIDBCursorConstructor:
        return replacedBy("webkitIDBCursor", "IDBCursor");

    case PrefixedIDBDatabaseConstructor:
        return replacedBy("webkitIDBDatabase", "IDBDatabase");

    case PrefixedIDBFactoryConstructor:
        return replacedBy("webkitIDBFactory", "IDBFactory");

    case PrefixedIDBIndexConstructor:
        return replacedBy("webkitIDBIndex", "IDBIndex");

    case PrefixedIDBKeyRangeConstructor:
        return replacedBy("webkitIDBKeyRange", "IDBKeyRange");

    case PrefixedIDBObjectStoreConstructor:
        return replacedBy("webkitIDBObjectStore", "IDBObjectStore");

    case PrefixedIDBRequestConstructor:
        return replacedBy("webkitIDBRequest", "IDBRequest");

    case PrefixedIDBTransactionConstructor:
        return replacedBy("webkitIDBTransaction", "IDBTransaction");

    case PrefixedRequestAnimationFrame:
        return "'webkitRequestAnimationFrame' is vendor-specific. Please use the standard 'requestAnimationFrame' instead.";

    case PrefixedCancelAnimationFrame:
        return "'webkitCancelAnimationFrame' is vendor-specific. Please use the standard 'cancelAnimationFrame' instead.";

    case PrefixedCancelRequestAnimationFrame:
        return "'webkitCancelRequestAnimationFrame' is vendor-specific. Please use the standard 'cancelAnimationFrame' instead.";

    case NodeIteratorDetach:
        return "'NodeIterator.detach' is now a no-op, as per DOM (http://dom.spec.whatwg.org/#dom-nodeiterator-detach).";

    case RangeDetach:
        return "'Range.detach' is now a no-op, as per DOM (http://dom.spec.whatwg.org/#dom-range-detach).";

    case SyncXHRWithCredentials:
        return "Setting 'XMLHttpRequest.withCredentials' for synchronous requests is deprecated.";

    case PictureSourceSrc:
        return "<source src> with a <picture> parent is invalid and therefore ignored. Please use <source srcset> instead.";

    case XHRProgressEventPosition:
        return "The XMLHttpRequest progress event property 'position' is deprecated. Please use 'loaded' instead.";

    case XHRProgressEventTotalSize:
        return "The XMLHttpRequest progress event property 'totalSize' is deprecated. Please use 'total' instead.";

    case ConsoleTimeline:
        return replacedBy("console.timeline", "console.time");

    case ConsoleTimelineEnd:
        return replacedBy("console.timelineEnd", "console.timeEnd");

    case CanvasRenderingContext2DCompositeOperationDarker:
        return replacedBy("darker", "darken");

    case XMLHttpRequestSynchronousInNonWorkerOutsideBeforeUnload:
        return "Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check http://xhr.spec.whatwg.org/.";

    case GetMatchedCSSRules:
        return "'getMatchedCSSRules()' is deprecated. For more help, check https://code.google.com/p/chromium/issues/detail?id=437569#c2";

    case PrefixedImageSmoothingEnabled:
        return replacedBy("CanvasRenderingContext2D.webkitImageSmoothingEnabled", "CanvasRenderingContext2D.imageSmoothingEnabled");

    case AudioListenerDopplerFactor:
        return "dopplerFactor is deprecated and will be removed in M45 when all doppler effects are removed";

    case AudioListenerSpeedOfSound:
        return "speedOfSound is deprecated and will be removed in M45 when all doppler effects are removed";

    case AudioListenerSetVelocity:
        return "setVelocity() is deprecated and will be removed in M45 when all doppler effects are removed";

    case PrefixedWindowURL:
        return replacedBy("webkitURL", "URL");

    case PrefixedAudioContext:
        return replacedBy("webkitAudioContext", "AudioContext");

    case PrefixedOfflineAudioContext:
        return replacedBy("webkitOfflineAudioContext", "OfflineAudioContext");

    case RangeExpand:
        return replacedBy("Range.expand()", "Selection.modify()");

    case PrefixedMediaAddKey:
    case PrefixedMediaGenerateKeyRequest:
    case PrefixedMediaCancelKeyRequest:
        return "The prefixed Encrypted Media Extensions APIs are deprecated and will be removed in M47 (beta around October 2015). Please use 'navigator.requestMediaKeySystemAccess()' instead.";

    case CanPlayTypeKeySystem:
        return "canPlayType()'s 'keySystem' parameter is deprecated and will be ignored in M47 (beta around October 2015). Please use 'navigator.requestMediaKeySystemAccess()' instead.";

    case SVGSVGElementForceRedraw:
        return "'SVGSVGElement.forceRedraw()' is deprecated, please do not use it. It is a no-op, as per SVG2 (https://svgwg.org/svg2-draft/struct.html#__svg__SVGSVGElement__forceRedraw).";

    case SVGSVGElementSuspendRedraw:
        return "'SVGSVGElement.suspendRedraw()' is deprecated, please do not use it. It is a no-op, as per SVG2 (https://svgwg.org/svg2-draft/struct.html#__svg__SVGSVGElement__suspendRedraw).";

    case SVGSVGElementUnsuspendRedraw:
        return "'SVGSVGElement.unsuspendRedraw()' is deprecated, please do not use it. It is a no-op, as per SVG2 (https://svgwg.org/svg2-draft/struct.html#__svg__SVGSVGElement__unsuspendRedraw).";

    case SVGSVGElementUnsuspendRedrawAll:
        return "'SVGSVGElement.unsuspendRedrawAll()' is deprecated, please do not use it. It is a no-op, as per SVG2 (https://svgwg.org/svg2-draft/struct.html#__svg__SVGSVGElement__unsuspendRedrawAll).";

    // Powerful features on insecure origins (https://goo.gl/rStTGz)
    case DeviceMotionInsecureOrigin:
        return "The devicemotion event is deprecated on insecure origins, and support will be removed in the future. You should consider switching your application to a secure origin, such as HTTPS. See https://goo.gl/rStTGz for more details.";

    case DeviceOrientationInsecureOrigin:
        return "The deviceorientation event is deprecated on insecure origins, and support will be removed in the future. You should consider switching your application to a secure origin, such as HTTPS. See https://goo.gl/rStTGz for more details.";

    case GeolocationInsecureOrigin:
        return "getCurrentPosition() and watchPosition() are deprecated on insecure origins, and support will be removed in the future. You should consider switching your application to a secure origin, such as HTTPS. See https://goo.gl/rStTGz for more details.";

    case GetUserMediaInsecureOrigin:
        return "getUserMedia() is deprecated on insecure origins, and support will be removed in the future. You should consider switching your application to a secure origin, such as HTTPS. See https://goo.gl/rStTGz for more details.";

    case FullscreenInsecureOrigin:
        return "requestFullscreen() is deprecated on insecure origins, and support will be removed in the future. You should consider switching your application to a secure origin, such as HTTPS. See https://goo.gl/rStTGz for more details.";

    case EncryptedMediaInsecureOrigin:
        return "requestMediaKeySystemAccess() is deprecated on insecure origins in the specification. Support will be removed in the future. You should consider switching your application to a secure origin, such as HTTPS. See https://goo.gl/rStTGz for more details.";

    case DocumentGetCSSCanvasContext:
        return "The -webkit-canvas CSS feature is deprecated. Please use a positioned <canvas> element instead.";

    case ElementCreateShadowRootMultiple:
        return "Calling Element.createShadowRoot() for an element which already hosts a shadow root is deprecated. See https://www.chromestatus.com/features/4668884095336448 for more details.";

    case ElementCreateShadowRootMultipleWithUserAgentShadowRoot:
        return "Calling Element.createShadowRoot() for an element which already hosts a user-agent shadow root is deprecated. See https://www.chromestatus.com/features/4668884095336448 for more details.";

    case PrefixedTouchRadiusX:
        return "'Touch.webkitRadiusX' is deprecated and will be removed in M47, around November 2015. Please use 'Touch.radiusX' instead.";

    case PrefixedTouchRadiusY:
        return "'Touch.webkitRadiusY' is deprecated and will be removed in M47, around November 2015. Please use 'Touch.radiusY' instead.";

    case PrefixedTouchRotationAngle:
        return "'Touch.webkitRotationAngle' is deprecated and will be removed in M47, around November 2015. Please use 'Touch.rotationAngle' instead.";

    case PrefixedTouchForce:
        return "'Touch.webkitForce' is deprecated and will be removed in M47, around November 2015. Please use 'Touch.force' instead.";

    case CSSDeepCombinator:
        return "/deep/ combinator is deprecated. See https://www.chromestatus.com/features/6750456638341120 for more details.";

    case CSSSelectorPseudoShadow:
        return "::shadow pseudo-element is deprecated. See https://www.chromestatus.com/features/6750456638341120 for more details.";

    case PrefixedMouseEventMovementX:
        return replacedBy("webkitMovementX", "movementX");

    case PrefixedMouseEventMovementY:
        return replacedBy("webkitMovementY", "movementY");

    case SVGSMILElementInDocument:
    case SVGSMILAnimationInImageRegardlessOfCache:
        return "SVG's SMIL animations (<animate>, <set>, etc.) are deprecated and will be removed. Please use CSS animations or Web animations instead.";

    case MediaStreamLabel:
        return "'MediaStream.label' is deprecated and will be removed in M47, around November 2015. Please use 'MediaStream.id' instead.";

    case MediaStreamStop:
        return "'MediaStream.stop()' is deprecated and will be removed in M47, around November 2015. Please use 'MediaStream.active' instead.";

    case MediaStreamEnded:
        return "'MediaStream.ended' is deprecated and will be removed in M47, around November 2015. Please use 'MediaStream.active' instead.";

    case PermissionStatusStatus:
        return "PermissionStatus.status is deprecated and will be removed in M47, around November 2015. Please use PermissionStatus.state instead.";

    case ElementOffsetParent:
        return "'Element.offsetParent' is deprecated and will be removed in M47, around Novemver 2015. The offset* attributes are only standardized and widely supported for HTML elements.";

    case ElementOffsetTop:
        return "'Element.offsetTop' is deprecated and will be removed in M47, around Novemver 2015. The offset* attributes are only standardized and widely supported for HTML elements.";

    case ElementOffsetLeft:
        return "'Element.offsetLeft' is deprecated and will be removed in M47, around Novemver 2015. The offset* attributes are only standardized and widely supported for HTML elements.";

    case ElementOffsetWidth:
        return "'Element.offsetWidth' is deprecated and will be removed in M47, around Novemver 2015. The offset* attributes are only standardized and widely supported for HTML elements.";

    case ElementOffsetHeight:
        return "'Element.offsetHeight' is deprecated and will be removed in M47, around Novemver 2015. The offset* attributes are only standardized and widely supported for HTML elements.";

    case PrefixedPerformanceClearResourceTimings:
        return replacedBy("Performance.webkitClearResourceTimings", "Performance.clearResourceTimings");

    case PrefixedPerformanceSetResourceTimingBufferSize:
        return replacedBy("Performance.webkitSetResourceTimingBufferSize", "Performance.setResourceTimingBufferSize");

    case PrefixedPerformanceResourceTimingBufferFull:
        return replacedBy("Performance.onwebkitresourcetimingbufferfull", "Performance.onresourcetimingbufferfull");

    case FetchAPIRequestContext:
        return "Request.context is deprecated and will be removed in M46 (see: https://www.chromestatus.com/feature/5534702526005248).";

    // Features that aren't deprecated don't have a deprecation message.
    default:
        return String();
    }
}

void UseCounter::count(CSSParserContext context, CSSPropertyID feature)
{
    ASSERT(feature >= firstCSSProperty);
    ASSERT(feature <= lastUnresolvedCSSProperty);

    if (!isUseCounterEnabledForMode(context.mode()))
        return;

    m_CSSFeatureBits.quickSet(feature);
}

void UseCounter::count(Feature feature)
{
    ASSERT(deprecationMessage(feature).isEmpty());
    recordMeasurement(feature);
}

UseCounter* UseCounter::getFrom(const Document* document)
{
    if (document && document->frameHost())
        return &document->frameHost()->useCounter();
    return 0;
}

UseCounter* UseCounter::getFrom(const CSSStyleSheet* sheet)
{
    if (sheet)
        return getFrom(sheet->contents());
    return 0;
}

UseCounter* UseCounter::getFrom(const StyleSheetContents* sheetContents)
{
    // FIXME: We may want to handle stylesheets that have multiple owners
    //        http://crbug.com/242125
    if (sheetContents && sheetContents->hasSingleOwnerNode())
        return getFrom(sheetContents->singleOwnerDocument());
    return 0;
}

} // namespace blink