Move almost all of CSSPropertyParser into CSSPropertyParser.cpp

Source/core/css/parser/CSSPropertyParser.cpp

 /*
  * Copyright (C) 2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
  * Copyright (C) 2012 Intel Corporation. All rights reserved.
  *
@@ skipping 11 matching lines @@
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "config.h"
 #include "core/css/parser/CSSPropertyParser.h"
 #include "RuntimeEnabledFeatures.h"
 #include "core/rendering/RenderTheme.h"
 #include "core/svg/SVGPaint.h"
+// FIXME: Way too many!
+#include "CSSValueKeywords.h"
+#include "RuntimeEnabledFeatures.h"
+#include "StylePropertyShorthand.h"
+#include "core/css/CSSArrayFunctionValue.h"
+#include "core/css/CSSAspectRatioValue.h"
+#include "core/css/CSSBasicShapes.h"
+#include "core/css/CSSBorderImage.h"
+#include "core/css/CSSCanvasValue.h"
+#include "core/css/CSSCrossfadeValue.h"
+#include "core/css/CSSCursorImageValue.h"
+#include "core/css/CSSFontFaceSrcValue.h"
+#include "core/css/CSSFontFeatureValue.h"
+#include "core/css/CSSFunctionValue.h"
+#include "core/css/CSSGradientValue.h"
+#include "core/css/CSSGridLineNamesValue.h"
+#include "core/css/CSSGridTemplateAreasValue.h"
+#include "core/css/CSSImageSetValue.h"
+#include "core/css/CSSImageValue.h"
+#include "core/css/CSSInheritedValue.h"
+#include "core/css/CSSInitialValue.h"
+#include "core/css/CSSKeyframeRule.h"
+#include "core/css/CSSKeyframesRule.h"
+#include "core/css/CSSLineBoxContainValue.h"
+#include "core/css/CSSParserValues.h"
+#include "core/css/CSSPrimitiveValue.h"
+#include "core/css/CSSPropertySourceData.h"
+#include "core/css/CSSReflectValue.h"
+#include "core/css/CSSSVGDocumentValue.h"
+#include "core/css/CSSSelector.h"
+#include "core/css/CSSShadowValue.h"
+#include "core/css/CSSTimingFunctionValue.h"
+#include "core/css/CSSTransformValue.h"
+#include "core/css/CSSUnicodeRangeValue.h"
+#include "core/css/CSSValueList.h"
+#include "core/css/CSSValuePool.h"
+#include "core/css/Counter.h"
+#include "core/css/HashTools.h"
+#include "core/css/Pair.h"
+#include "core/css/Rect.h"
+#include "core/css/parser/CSSParserIdioms.h"
+#include "core/html/parser/HTMLParserIdioms.h"
+#include "core/inspector/InspectorInstrumentation.h"
+#include "core/rendering/RenderTheme.h"
+#include "core/svg/SVGParserUtilities.h"
+#include "platform/FloatConversion.h"
+#include "wtf/BitArray.h"
+#include "wtf/HexNumber.h"
+#include "wtf/text/StringBuffer.h"
+#include "wtf/text/StringBuilder.h"
+#include "wtf/text/StringImpl.h"
+#include "wtf/text/TextEncoding.h"
+#include <limits.h>
 
 using namespace std;
 
 namespace WebCore {
 
+static const double MAX_SCALE = 1000000;
+
+template <unsigned N>
+static bool equal(const CSSParserString& a, const char (&b)[N])
+{
+    unsigned length = N - 1; // Ignore the trailing null character
+    if (a.length() != length)
+        return false;
+
+    return a.is8Bit() ? WTF::equal(a.characters8(), reinterpret_cast<const LChar*>(b), length) : WTF::equal(a.characters16(), reinterpret_cast<const LChar*>(b), length);
+}
+
+template <unsigned N>
+static bool equalIgnoringCase(const CSSParserString& a, const char (&b)[N])
+{
+    unsigned length = N - 1; // Ignore the trailing null character
+    if (a.length() != length)
+        return false;
+
+    return a.is8Bit() ? WTF::equalIgnoringCase(b, a.characters8(), length) : WTF::equalIgnoringCase(b, a.characters16(), length);
+}
+
+template <unsigned N>
+static bool equalIgnoringCase(CSSParserValue* value, const char (&b)[N])
+{
+    ASSERT(value->unit == CSSPrimitiveValue::CSS_IDENT || value->unit == CSSPrimitiveValue::CSS_STRING);
+    return equalIgnoringCase(value->string, b);
+}
+
+static PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createPrimitiveValuePair(PassRefPtrWillBeRawPtr<CSSPrimitiveValue> first, PassRefPtrWillBeRawPtr<CSSPrimitiveValue> second, Pair::IdenticalValuesPolicy identicalValuesPolicy = Pair::DropIdenticalValues)
+{
+    return cssValuePool().createValue(Pair::create(first, second, identicalValuesPolicy));
+}
+
+class AnimationParseContext {
+public:
+    AnimationParseContext()
+        : m_animationPropertyKeywordAllowed(true)
+        , m_firstAnimationCommitted(false)
+        , m_hasSeenAnimationPropertyKeyword(false)
+    {
+    }
+
+    void commitFirstAnimation()
+    {
+        m_firstAnimationCommitted = true;
+    }
+
+    bool hasCommittedFirstAnimation() const
+    {
+        return m_firstAnimationCommitted;
+    }
+
+    void commitAnimationPropertyKeyword()
+    {
+        m_animationPropertyKeywordAllowed = false;
+    }
+
+    bool animationPropertyKeywordAllowed() const
+    {
+        return m_animationPropertyKeywordAllowed;
+    }
+
+    bool hasSeenAnimationPropertyKeyword() const
+    {
+        return m_hasSeenAnimationPropertyKeyword;
+    }
+
+    void sawAnimationPropertyKeyword()
+    {
+        m_hasSeenAnimationPropertyKeyword = true;
+    }
+
+private:
+    bool m_animationPropertyKeywordAllowed;
+    bool m_firstAnimationCommitted;
+    bool m_hasSeenAnimationPropertyKeyword;
+};
+
 CSSPropertyParser::CSSPropertyParser(OwnPtr<CSSParserValueList>& valueList,
     const CSSParserContext& context, bool inViewport, bool savedImportant,
     ParsedPropertyVector& parsedProperties, bool& hasFontFaceOnlyValues)
     : m_valueList(valueList)
     , m_context(context)
     , m_inViewport(inViewport)
     , m_important(savedImportant) // See comment in header, should be removed.
     , m_parsedProperties(parsedProperties)
     , m_hasFontFaceOnlyValues(hasFontFaceOnlyValues)
     , m_inParseShorthand(0)
     , m_currentShorthand(CSSPropertyInvalid)
     , m_implicitShorthand(false)
 {
 }
 
 CSSPropertyParser::~CSSPropertyParser()
 {
 }
 
+void CSSPropertyParser::addPropertyWithPrefixingVariant(CSSPropertyID propId, PassRefPtrWillBeRawPtr<CSSValue> value, bool important, bool implicit)
+{
+    RefPtrWillBeRawPtr<CSSValue> val = value.get();
+    addProperty(propId, value, important, implicit);
+
+    CSSPropertyID prefixingVariant = prefixingVariantForPropertyId(propId);
+    if (prefixingVariant == propId)
+        return;
+
+    if (m_currentShorthand) {
+        // We can't use ShorthandScope here as we can already be inside one (e.g we are parsing CSSTransition).
+        m_currentShorthand = prefixingVariantForPropertyId(m_currentShorthand);
+        addProperty(prefixingVariant, val.release(), important, implicit);
+        m_currentShorthand = prefixingVariantForPropertyId(m_currentShorthand);
+    } else {
+        addProperty(prefixingVariant, val.release(), important, implicit);
+    }
+}
+
+void CSSPropertyParser::addProperty(CSSPropertyID propId, PassRefPtrWillBeRawPtr<CSSValue> value, bool important, bool implicit)
+{
+    // This property doesn't belong to a shorthand.
+    if (!m_currentShorthand) {
+        m_parsedProperties.append(CSSProperty(propId, value, important, false, CSSPropertyInvalid, m_implicitShorthand || implicit));
+        return;
+    }
+
+    Vector<StylePropertyShorthand, 4> shorthands;
+    getMatchingShorthandsForLonghand(propId, &shorthands);
+    // The longhand does not belong to multiple shorthands.
+    if (shorthands.size() == 1)
+        m_parsedProperties.append(CSSProperty(propId, value, important, true, CSSPropertyInvalid, m_implicitShorthand || implicit));
+    else
+        m_parsedProperties.append(CSSProperty(propId, value, important, true, indexOfShorthandForLonghand(m_currentShorthand, shorthands), m_implicitShorthand || implicit));
+}
+
+void CSSPropertyParser::rollbackLastProperties(int num)
+{
+    ASSERT(num >= 0);
+    ASSERT(m_parsedProperties.size() >= static_cast<unsigned>(num));
+    m_parsedProperties.shrink(m_parsedProperties.size() - num);
+}
+
+KURL CSSPropertyParser::completeURL(const String& url) const
+{
+    return m_context.completeURL(url);
+}
+
+bool CSSPropertyParser::validCalculationUnit(CSSParserValue* value, Units unitflags, ReleaseParsedCalcValueCondition releaseCalc)
+{
+    bool mustBeNonNegative = unitflags & FNonNeg;
+
+    if (!parseCalculation(value, mustBeNonNegative ? ValueRangeNonNegative : ValueRangeAll))
+        return false;
+
+    bool b = false;
+    switch (m_parsedCalculation->category()) {
+    case CalcLength:
+        b = (unitflags & FLength);
+        break;
+    case CalcPercent:
+        b = (unitflags & FPercent);
+        if (b && mustBeNonNegative && m_parsedCalculation->isNegative())
+            b = false;
+        break;
+    case CalcNumber:
+        b = (unitflags & FNumber);
+        if (!b && (unitflags & FInteger) && m_parsedCalculation->isInt())
+            b = true;
+        if (b && mustBeNonNegative && m_parsedCalculation->isNegative())
+            b = false;
+        break;
+    case CalcPercentLength:
+        b = (unitflags & FPercent) && (unitflags & FLength);
+        break;
+    case CalcPercentNumber:
+        b = (unitflags & FPercent) && (unitflags & FNumber);
+        break;
+    case CalcOther:
+        break;
+    }
+    if (!b || releaseCalc == ReleaseParsedCalcValue)
+        m_parsedCalculation.release();
+    return b;
+}
+
+inline bool CSSPropertyParser::shouldAcceptUnitLessValues(CSSParserValue* value, Units unitflags, CSSParserMode cssParserMode)
+{
+    // Quirks mode and presentation attributes accept unit less values.
+    return (unitflags & (FLength | FAngle | FTime)) && (!value->fValue || isUnitLessLengthParsingEnabledForMode(cssParserMode));
+}
+
+bool CSSPropertyParser::validUnit(CSSParserValue* value, Units unitflags, CSSParserMode cssParserMode, ReleaseParsedCalcValueCondition releaseCalc)
+{
+    if (isCalculation(value))
+        return validCalculationUnit(value, unitflags, releaseCalc);
+
+    bool b = false;
+    switch (value->unit) {
+    case CSSPrimitiveValue::CSS_NUMBER:
+        b = (unitflags & FNumber);
+        if (!b && shouldAcceptUnitLessValues(value, unitflags, cssParserMode)) {
+            value->unit = (unitflags & FLength) ? CSSPrimitiveValue::CSS_PX :
+                          ((unitflags & FAngle) ? CSSPrimitiveValue::CSS_DEG : CSSPrimitiveValue::CSS_MS);
+            b = true;
+        }
+        if (!b && (unitflags & FInteger) && value->isInt)
+            b = true;
+        if (!b && (unitflags & FPositiveInteger) && value->isInt && value->fValue > 0)
+            b = true;
+        break;
+    case CSSPrimitiveValue::CSS_PERCENTAGE:
+        b = (unitflags & FPercent);
+        break;
+    case CSSParserValue::Q_EMS:
+    case CSSPrimitiveValue::CSS_EMS:
+    case CSSPrimitiveValue::CSS_REMS:
+    case CSSPrimitiveValue::CSS_CHS:
+    case CSSPrimitiveValue::CSS_EXS:
+    case CSSPrimitiveValue::CSS_PX:
+    case CSSPrimitiveValue::CSS_CM:
+    case CSSPrimitiveValue::CSS_MM:
+    case CSSPrimitiveValue::CSS_IN:
+    case CSSPrimitiveValue::CSS_PT:
+    case CSSPrimitiveValue::CSS_PC:
+    case CSSPrimitiveValue::CSS_VW:
+    case CSSPrimitiveValue::CSS_VH:
+    case CSSPrimitiveValue::CSS_VMIN:
+    case CSSPrimitiveValue::CSS_VMAX:
+        b = (unitflags & FLength);
+        break;
+    case CSSPrimitiveValue::CSS_MS:
+    case CSSPrimitiveValue::CSS_S:
+        b = (unitflags & FTime);
+        break;
+    case CSSPrimitiveValue::CSS_DEG:
+    case CSSPrimitiveValue::CSS_RAD:
+    case CSSPrimitiveValue::CSS_GRAD:
+    case CSSPrimitiveValue::CSS_TURN:
+        b = (unitflags & FAngle);
+        break;
+    case CSSPrimitiveValue::CSS_DPPX:
+    case CSSPrimitiveValue::CSS_DPI:
+    case CSSPrimitiveValue::CSS_DPCM:
+        b = (unitflags & FResolution);
+        break;
+    case CSSPrimitiveValue::CSS_HZ:
+    case CSSPrimitiveValue::CSS_KHZ:
+    case CSSPrimitiveValue::CSS_DIMENSION:
+    default:
+        break;
+    }
+    if (b && unitflags & FNonNeg && value->fValue < 0)
+        b = false;
+    return b;
+}
+
+PassRefPtrWillBeRawPtr<CSSPrimitiveValue> CSSPropertyParser::createPrimitiveNumericValue(CSSParserValue* value)
+{
+    if (m_parsedCalculation) {
+        ASSERT(isCalculation(value));
+        return CSSPrimitiveValue::create(m_parsedCalculation.release());
+    }
+
+    ASSERT((value->unit >= CSSPrimitiveValue::CSS_NUMBER && value->unit <= CSSPrimitiveValue::CSS_KHZ)
+        || (value->unit >= CSSPrimitiveValue::CSS_TURN && value->unit <= CSSPrimitiveValue::CSS_CHS)
+        || (value->unit >= CSSPrimitiveValue::CSS_VW && value->unit <= CSSPrimitiveValue::CSS_VMAX)
+        || (value->unit >= CSSPrimitiveValue::CSS_DPPX && value->unit <= CSSPrimitiveValue::CSS_DPCM));
+    return cssValuePool().createValue(value->fValue, static_cast<CSSPrimitiveValue::UnitTypes>(value->unit));
+}
+
+inline PassRefPtrWillBeRawPtr<CSSPrimitiveValue> CSSPropertyParser::createPrimitiveStringValue(CSSParserValue* value)
+{
+    ASSERT(value->unit == CSSPrimitiveValue::CSS_STRING || value->unit == CSSPrimitiveValue::CSS_IDENT);
+    return cssValuePool().createValue(value->string, CSSPrimitiveValue::CSS_STRING);
+}
+
+static inline bool isComma(CSSParserValue* value)
+{
+    return value && value->unit == CSSParserValue::Operator && value->iValue == ',';
+}
+
+static inline bool isForwardSlashOperator(CSSParserValue* value)
+{
+    ASSERT(value);
+    return value->unit == CSSParserValue::Operator && value->iValue == '/';
+}
+
+static bool isGeneratedImageValue(CSSParserValue* val)
+{
+    if (val->unit != CSSParserValue::Function)
+        return false;
+
+    return equalIgnoringCase(val->function->name, "-webkit-gradient(")
+        || equalIgnoringCase(val->function->name, "-webkit-linear-gradient(")
+        || equalIgnoringCase(val->function->name, "linear-gradient(")
+        || equalIgnoringCase(val->function->name, "-webkit-repeating-linear-gradient(")
+        || equalIgnoringCase(val->function->name, "repeating-linear-gradient(")
+        || equalIgnoringCase(val->function->name, "-webkit-radial-gradient(")
+        || equalIgnoringCase(val->function->name, "radial-gradient(")
+        || equalIgnoringCase(val->function->name, "-webkit-repeating-radial-gradient(")
+        || equalIgnoringCase(val->function->name, "repeating-radial-gradient(")
+        || equalIgnoringCase(val->function->name, "-webkit-canvas(")
+        || equalIgnoringCase(val->function->name, "-webkit-cross-fade(");
+}
+
+bool CSSPropertyParser::validWidthOrHeight(CSSParserValue* value)
+{
+    int id = value->id;
+    if (id == CSSValueIntrinsic || id == CSSValueMinIntrinsic || id == CSSValueWebkitMinContent || id == CSSValueWebkitMaxContent || id == CSSValueWebkitFillAvailable || id == CSSValueWebkitFitContent)
+        return true;
+    return !id && validUnit(value, FLength | FPercent | FNonNeg);
+}
+
+inline PassRefPtrWillBeRawPtr<CSSPrimitiveValue> CSSPropertyParser::parseValidPrimitive(CSSValueID identifier, CSSParserValue* value)
+{
+    if (identifier)
+        return cssValuePool().createIdentifierValue(identifier);
+    if (value->unit == CSSPrimitiveValue::CSS_STRING)
+        return createPrimitiveStringValue(value);
+    if (value->unit >= CSSPrimitiveValue::CSS_NUMBER && value->unit <= CSSPrimitiveValue::CSS_KHZ)
+        return createPrimitiveNumericValue(value);
+    if (value->unit >= CSSPrimitiveValue::CSS_TURN && value->unit <= CSSPrimitiveValue::CSS_CHS)
+        return createPrimitiveNumericValue(value);
+    if (value->unit >= CSSPrimitiveValue::CSS_VW && value->unit <= CSSPrimitiveValue::CSS_VMAX)
+        return createPrimitiveNumericValue(value);
+    if (value->unit >= CSSPrimitiveValue::CSS_DPPX && value->unit <= CSSPrimitiveValue::CSS_DPCM)
+        return createPrimitiveNumericValue(value);
+    if (value->unit >= CSSParserValue::Q_EMS)
+        return CSSPrimitiveValue::createAllowingMarginQuirk(value->fValue, CSSPrimitiveValue::CSS_EMS);
+    if (isCalculation(value))
+        return CSSPrimitiveValue::create(m_parsedCalculation.release());
+
+    return nullptr;
+}
+
+void CSSPropertyParser::addExpandedPropertyForValue(CSSPropertyID propId, PassRefPtrWillBeRawPtr<CSSValue> prpValue, bool important)
+{
+    const StylePropertyShorthand& shorthand = shorthandForProperty(propId);
+    unsigned shorthandLength = shorthand.length();
+    if (!shorthandLength) {
+        addProperty(propId, prpValue, important);
+        return;
+    }
+
+    RefPtrWillBeRawPtr<CSSValue> value = prpValue;
+    ShorthandScope scope(this, propId);
+    const CSSPropertyID* longhands = shorthand.properties();
+    for (unsigned i = 0; i < shorthandLength; ++i)
+        addProperty(longhands[i], value, important);
+}
+
+bool CSSPropertyParser::parseValue(CSSPropertyID propId, bool important)
+{
+    if (!isInternalPropertyAndValueParsingEnabledForMode(m_context.mode()) && isInternalProperty(propId))
+        return false;
+
+    // We don't count the UA style sheet in our statistics.
+    if (m_context.useCounter())
+        m_context.useCounter()->count(m_context, propId);
+
+    if (!m_valueList)
+        return false;
+
+    CSSParserValue* value = m_valueList->current();
+
+    if (!value)
+        return false;
+
+    if (inViewport()) {
+        // Allow @viewport rules from UA stylesheets even if the feature is disabled.
+        if (!RuntimeEnabledFeatures::cssViewportEnabled() && !isUASheetBehavior(m_context.mode()))
+            return false;
+
+        return parseViewportProperty(propId, important);
+    }
+
+    // Note: m_parsedCalculation is used to pass the calc value to validUnit and then cleared at the end of this function.
+    // FIXME: This is to avoid having to pass parsedCalc to all validUnit callers.
+    ASSERT(!m_parsedCalculation);
+
+    CSSValueID id = value->id;
+
+    int num = inShorthand() ? 1 : m_valueList->size();
+
+    if (id == CSSValueInherit) {
+        if (num != 1)
+            return false;
+        addExpandedPropertyForValue(propId, cssValuePool().createInheritedValue(), important);
+        return true;
+    }
+    else if (id == CSSValueInitial) {
+        if (num != 1)
+            return false;
+        addExpandedPropertyForValue(propId, cssValuePool().createExplicitInitialValue(), important);
+        return true;
+    }
+
+    if (isKeywordPropertyID(propId)) {
+        if (!isValidKeywordPropertyAndValue(propId, id, m_context))
+            return false;
+        if (m_valueList->next() && !inShorthand())
+            return false;
+        addProperty(propId, cssValuePool().createIdentifierValue(id), important);
+        return true;
+    }
+
+    bool validPrimitive = false;
+    RefPtrWillBeRawPtr<CSSValue> parsedValue;
+
+    switch (propId) {
+    case CSSPropertySize:                 // <length>{1,2} | auto | [ <page-size> || [ portrait | landscape] ]
+        return parseSize(propId, important);
+
+    case CSSPropertyQuotes:               // [<string> <string>]+ | none | inherit
+        if (id)
+            validPrimitive = true;
+        else
+            return parseQuotes(propId, important);
+        break;
+    case CSSPropertyUnicodeBidi: // normal | embed | bidi-override | isolate | isolate-override | plaintext | inherit
+        if (id == CSSValueNormal
+            || id == CSSValueEmbed
+            || id == CSSValueBidiOverride
+            || id == CSSValueWebkitIsolate
+            || id == CSSValueWebkitIsolateOverride
+            || id == CSSValueWebkitPlaintext)
+            validPrimitive = true;
+        break;
+
+    case CSSPropertyContent:              // [ <string> | <uri> | <counter> | attr(X) | open-quote |
+        // close-quote | no-open-quote | no-close-quote ]+ | inherit
+        return parseContent(propId, important);
+
+    case CSSPropertyClip:                 // <shape> | auto | inherit
+        if (id == CSSValueAuto)
+            validPrimitive = true;
+        else if (value->unit == CSSParserValue::Function)
+            return parseClipShape(propId, important);
+        break;
+
+    /* Start of supported CSS properties with validation. This is needed for parseShorthand to work
+     * correctly and allows optimization in WebCore::applyRule(..)
+     */
+    case CSSPropertyOverflow: {
+        ShorthandScope scope(this, propId);
+        if (num != 1 || !parseValue(CSSPropertyOverflowY, important))
+            return false;
+
+        RefPtrWillBeRawPtr<CSSValue> overflowXValue;
+
+        // FIXME: -webkit-paged-x or -webkit-paged-y only apply to overflow-y. If this value has been
+        // set using the shorthand, then for now overflow-x will default to auto, but once we implement
+        // pagination controls, it should default to hidden. If the overflow-y value is anything but
+        // paged-x or paged-y, then overflow-x and overflow-y should have the same value.
+        if (id == CSSValueWebkitPagedX || id == CSSValueWebkitPagedY)
+            overflowXValue = cssValuePool().createIdentifierValue(CSSValueAuto);
+        else
+            overflowXValue = m_parsedProperties.last().value();
+        addProperty(CSSPropertyOverflowX, overflowXValue.release(), important);
+        return true;
+    }
+
+    case CSSPropertyTextAlign:
+        // left | right | center | justify | -webkit-left | -webkit-right | -webkit-center | -webkit-match-parent
+        // | start | end | <string> | inherit | -webkit-auto (converted to start)
+        if ((id >= CSSValueWebkitAuto && id <= CSSValueWebkitMatchParent) || id == CSSValueStart || id == CSSValueEnd
+            || value->unit == CSSPrimitiveValue::CSS_STRING)
+            validPrimitive = true;
+        break;
+
+    case CSSPropertyFontWeight:  { // normal | bold | bolder | lighter | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 | inherit
+        if (m_valueList->size() != 1)
+            return false;
+        return parseFontWeight(important);
+    }
+    case CSSPropertyBorderSpacing: {
+        if (num == 1) {
+            ShorthandScope scope(this, CSSPropertyBorderSpacing);
+            if (!parseValue(CSSPropertyWebkitBorderHorizontalSpacing, important))
+                return false;
+            CSSValue* value = m_parsedProperties.last().value();
+            addProperty(CSSPropertyWebkitBorderVerticalSpacing, value, important);
+            return true;
+        }
+        else if (num == 2) {
+            ShorthandScope scope(this, CSSPropertyBorderSpacing);
+            if (!parseValue(CSSPropertyWebkitBorderHorizontalSpacing, important) || !parseValue(CSSPropertyWebkitBorderVerticalSpacing, important))
+                return false;
+            return true;
+        }
+        return false;
+    }
+    case CSSPropertyWebkitBorderHorizontalSpacing:
+    case CSSPropertyWebkitBorderVerticalSpacing:
+        validPrimitive = validUnit(value, FLength | FNonNeg);
+        break;
+    case CSSPropertyOutlineColor:        // <color> | invert | inherit
+        // Outline color has "invert" as additional keyword.
+        // Also, we want to allow the special focus color even in HTML Standard parsing mode.
+        if (id == CSSValueInvert || id == CSSValueWebkitFocusRingColor) {
+            validPrimitive = true;
+            break;
+        }
+        /* nobreak */
+    case CSSPropertyBackgroundColor: // <color> | inherit
+    case CSSPropertyBorderTopColor: // <color> | inherit
+    case CSSPropertyBorderRightColor:
+    case CSSPropertyBorderBottomColor:
+    case CSSPropertyBorderLeftColor:
+    case CSSPropertyWebkitBorderStartColor:
+    case CSSPropertyWebkitBorderEndColor:
+    case CSSPropertyWebkitBorderBeforeColor:
+    case CSSPropertyWebkitBorderAfterColor:
+    case CSSPropertyColor: // <color> | inherit
+    case CSSPropertyTextDecorationColor: // CSS3 text decoration colors
+    case CSSPropertyTextLineThroughColor:
+    case CSSPropertyTextUnderlineColor:
+    case CSSPropertyTextOverlineColor:
+    case CSSPropertyWebkitColumnRuleColor:
+    case CSSPropertyWebkitTextEmphasisColor:
+    case CSSPropertyWebkitTextFillColor:
+    case CSSPropertyWebkitTextStrokeColor:
+        if (propId == CSSPropertyTextDecorationColor
+            && !RuntimeEnabledFeatures::css3TextDecorationsEnabled())
+            return false;
+
+        if ((id >= CSSValueAqua && id <= CSSValueWebkitText) || id == CSSValueMenu) {
+            validPrimitive = isValueAllowedInMode(id, m_context.mode());
+        } else {
+            parsedValue = parseColor();
+            if (parsedValue)
+                m_valueList->next();
+        }
+        break;
+
+    case CSSPropertyCursor: {
+        // Grammar defined by CSS3 UI and modified by CSS4 images:
+        // [ [<image> [<x> <y>]?,]*
+        // [ auto | crosshair | default | pointer | progress | move | e-resize | ne-resize |
+        // nw-resize | n-resize | se-resize | sw-resize | s-resize | w-resize | ew-resize |
+        // ns-resize | nesw-resize | nwse-resize | col-resize | row-resize | text | wait | help |
+        // vertical-text | cell | context-menu | alias | copy | no-drop | not-allowed | -webkit-zoom-in
+        // -webkit-zoom-out | all-scroll | -webkit-grab | -webkit-grabbing ] ] | inherit
+        RefPtrWillBeRawPtr<CSSValueList> list;
+        while (value) {
+            RefPtrWillBeRawPtr<CSSValue> image = nullptr;
+            if (value->unit == CSSPrimitiveValue::CSS_URI) {
+                String uri = value->string;
+                if (!uri.isNull())
+                    image = CSSImageValue::create(uri, completeURL(uri));
+            } else if (value->unit == CSSParserValue::Function && equalIgnoringCase(value->function->name, "-webkit-image-set(")) {
+                image = parseImageSet(m_valueList.get());
+                if (!image)
+                    break;
+            } else
+                break;
+
+            Vector<int> coords;
+            value = m_valueList->next();
+            while (value && value->unit == CSSPrimitiveValue::CSS_NUMBER) {
+                coords.append(int(value->fValue));
+                value = m_valueList->next();
+            }
+            bool hasHotSpot = false;
+            IntPoint hotSpot(-1, -1);
+            int nrcoords = coords.size();
+            if (nrcoords > 0 && nrcoords != 2)
+                return false;
+            if (nrcoords == 2) {
+                hasHotSpot = true;
+                hotSpot = IntPoint(coords[0], coords[1]);
+            }
+
+            if (!list)
+                list = CSSValueList::createCommaSeparated();
+
+            if (image)
+                list->append(CSSCursorImageValue::create(image, hasHotSpot, hotSpot));
+
+            if (!value || !(value->unit == CSSParserValue::Operator && value->iValue == ','))
+                return false;
+            value = m_valueList->next(); // comma
+        }
+        if (list) {
+            if (!value)
+                return false;
+            if (inQuirksMode() && value->id == CSSValueHand) // MSIE 5 compatibility :/
+                list->append(cssValuePool().createIdentifierValue(CSSValuePointer));
+            else if ((value->id >= CSSValueAuto && value->id <= CSSValueWebkitGrabbing) || value->id == CSSValueCopy || value->id == CSSValueNone)
+                list->append(cssValuePool().createIdentifierValue(value->id));
+            m_valueList->next();
+            parsedValue = list.release();
+            break;
+        } else if (value) {
+            id = value->id;
+            if (inQuirksMode() && value->id == CSSValueHand) { // MSIE 5 compatibility :/
+                id = CSSValuePointer;
+                validPrimitive = true;
+            } else if ((value->id >= CSSValueAuto && value->id <= CSSValueWebkitGrabbing) || value->id == CSSValueCopy || value->id == CSSValueNone)
+                validPrimitive = true;
+        } else {
+            ASSERT_NOT_REACHED();
+            return false;
+        }
+        break;
+    }
+
+    case CSSPropertyBackgroundBlendMode:
+    case CSSPropertyBackgroundAttachment:
+    case CSSPropertyBackgroundClip:
+    case CSSPropertyWebkitBackgroundClip:
+    case CSSPropertyWebkitBackgroundComposite:
+    case CSSPropertyBackgroundImage:
+    case CSSPropertyBackgroundOrigin:
+    case CSSPropertyMaskSourceType:
+    case CSSPropertyWebkitBackgroundOrigin:
+    case CSSPropertyBackgroundPosition:
+    case CSSPropertyBackgroundPositionX:
+    case CSSPropertyBackgroundPositionY:
+    case CSSPropertyBackgroundSize:
+    case CSSPropertyWebkitBackgroundSize:
+    case CSSPropertyBackgroundRepeat:
+    case CSSPropertyBackgroundRepeatX:
+    case CSSPropertyBackgroundRepeatY:
+    case CSSPropertyWebkitMaskClip:
+    case CSSPropertyWebkitMaskComposite:
+    case CSSPropertyWebkitMaskImage:
+    case CSSPropertyWebkitMaskOrigin:
+    case CSSPropertyWebkitMaskPosition:
+    case CSSPropertyWebkitMaskPositionX:
+    case CSSPropertyWebkitMaskPositionY:
+    case CSSPropertyWebkitMaskSize:
+    case CSSPropertyWebkitMaskRepeat:
+    case CSSPropertyWebkitMaskRepeatX:
+    case CSSPropertyWebkitMaskRepeatY:
+    {
+        RefPtrWillBeRawPtr<CSSValue> val1;
+        RefPtrWillBeRawPtr<CSSValue> val2;
+        CSSPropertyID propId1, propId2;
+        bool result = false;
+        if (parseFillProperty(propId, propId1, propId2, val1, val2)) {
+            OwnPtr<ShorthandScope> shorthandScope;
+            if (propId == CSSPropertyBackgroundPosition ||
+                propId == CSSPropertyBackgroundRepeat ||
+                propId == CSSPropertyWebkitMaskPosition ||
+                propId == CSSPropertyWebkitMaskRepeat) {
+                shorthandScope = adoptPtr(new ShorthandScope(this, propId));
+            }
+            addProperty(propId1, val1.release(), important);
+            if (val2)
+                addProperty(propId2, val2.release(), important);
+            result = true;
+        }
+        m_implicitShorthand = false;
+        return result;
+    }
+    case CSSPropertyObjectPosition:
+        return RuntimeEnabledFeatures::objectFitPositionEnabled() && parseObjectPosition(important);
+    case CSSPropertyListStyleImage:     // <uri> | none | inherit
+    case CSSPropertyBorderImageSource:
+    case CSSPropertyWebkitMaskBoxImageSource:
+        if (id == CSSValueNone) {
+            parsedValue = cssValuePool().createIdentifierValue(CSSValueNone);
+            m_valueList->next();
+        } else if (value->unit == CSSPrimitiveValue::CSS_URI) {
+            parsedValue = CSSImageValue::create(value->string, completeURL(value->string));
+            m_valueList->next();
+        } else if (isGeneratedImageValue(value)) {
+            if (parseGeneratedImage(m_valueList.get(), parsedValue))
+                m_valueList->next();
+            else
+                return false;
+        }
+        else if (value->unit == CSSParserValue::Function && equalIgnoringCase(value->function->name, "-webkit-image-set(")) {
+            parsedValue = parseImageSet(m_valueList.get());
+            if (!parsedValue)
+                return false;
+            m_valueList->next();
+        }
+        break;
+
+    case CSSPropertyWebkitTextStrokeWidth:
+    case CSSPropertyOutlineWidth:        // <border-width> | inherit
+    case CSSPropertyBorderTopWidth:     //// <border-width> | inherit
+    case CSSPropertyBorderRightWidth:   //   Which is defined as
+    case CSSPropertyBorderBottomWidth:  //   thin | medium | thick | <length>
+    case CSSPropertyBorderLeftWidth:
+    case CSSPropertyWebkitBorderStartWidth:
+    case CSSPropertyWebkitBorderEndWidth:
+    case CSSPropertyWebkitBorderBeforeWidth:
+    case CSSPropertyWebkitBorderAfterWidth:
+    case CSSPropertyWebkitColumnRuleWidth:
+        if (id == CSSValueThin || id == CSSValueMedium || id == CSSValueThick)
+            validPrimitive = true;
+        else
+            validPrimitive = validUnit(value, FLength | FNonNeg);
+        break;
+
+    case CSSPropertyLetterSpacing:       // normal | <length> | inherit
+    case CSSPropertyWordSpacing:         // normal | <length> | inherit
+        if (id == CSSValueNormal)
+            validPrimitive = true;
+        else
+            validPrimitive = validUnit(value, FLength);
+        break;
+
+    case CSSPropertyTextIndent:
+        parsedValue = parseTextIndent();
+        break;
+
+    case CSSPropertyPaddingTop:          //// <padding-width> | inherit
+    case CSSPropertyPaddingRight:        //   Which is defined as
+    case CSSPropertyPaddingBottom:       //   <length> | <percentage>
+    case CSSPropertyPaddingLeft:         ////
+    case CSSPropertyWebkitPaddingStart:
+    case CSSPropertyWebkitPaddingEnd:
+    case CSSPropertyWebkitPaddingBefore:
+    case CSSPropertyWebkitPaddingAfter:
+        validPrimitive = (!id && validUnit(value, FLength | FPercent | FNonNeg));
+        break;
+
+    case CSSPropertyMaxWidth:
+    case CSSPropertyWebkitMaxLogicalWidth:
+    case CSSPropertyMaxHeight:
+    case CSSPropertyWebkitMaxLogicalHeight:
+        validPrimitive = (id == CSSValueNone || validWidthOrHeight(value));
+        break;
+
+    case CSSPropertyMinWidth:
+    case CSSPropertyWebkitMinLogicalWidth:
+    case CSSPropertyMinHeight:
+    case CSSPropertyWebkitMinLogicalHeight:
+        validPrimitive = validWidthOrHeight(value);
+        break;
+
+    case CSSPropertyWidth:
+    case CSSPropertyWebkitLogicalWidth:
+    case CSSPropertyHeight:
+    case CSSPropertyWebkitLogicalHeight:
+        validPrimitive = (id == CSSValueAuto || validWidthOrHeight(value));
+        break;
+
+    case CSSPropertyFontSize:
+        return parseFontSize(important);
+
+    case CSSPropertyFontVariant:         // normal | small-caps | inherit
+        return parseFontVariant(important);
+
+    case CSSPropertyVerticalAlign:
+        // baseline | sub | super | top | text-top | middle | bottom | text-bottom |
+        // <percentage> | <length> | inherit
+
+        if (id >= CSSValueBaseline && id <= CSSValueWebkitBaselineMiddle)
+            validPrimitive = true;
+        else
+            validPrimitive = (!id && validUnit(value, FLength | FPercent));
+        break;
+
+    case CSSPropertyBottom:               // <length> | <percentage> | auto | inherit
+    case CSSPropertyLeft:                 // <length> | <percentage> | auto | inherit
+    case CSSPropertyRight:                // <length> | <percentage> | auto | inherit
+    case CSSPropertyTop:                  // <length> | <percentage> | auto | inherit
+    case CSSPropertyMarginTop:           //// <margin-width> | inherit
+    case CSSPropertyMarginRight:         //   Which is defined as
+    case CSSPropertyMarginBottom:        //   <length> | <percentage> | auto | inherit
+    case CSSPropertyMarginLeft:          ////
+    case CSSPropertyWebkitMarginStart:
+    case CSSPropertyWebkitMarginEnd:
+    case CSSPropertyWebkitMarginBefore:
+    case CSSPropertyWebkitMarginAfter:
+        if (id == CSSValueAuto)
+            validPrimitive = true;
+        else
+            validPrimitive = (!id && validUnit(value, FLength | FPercent));
+        break;
+
+    case CSSPropertyOrphans: // <integer> | inherit | auto (We've added support for auto for backwards compatibility)
+    case CSSPropertyWidows: // <integer> | inherit | auto (Ditto)
+        if (id == CSSValueAuto)
+            validPrimitive = true;
+        else
+            validPrimitive = (!id && validUnit(value, FPositiveInteger, HTMLQuirksMode));
+        break;
+
+    case CSSPropertyZIndex: // auto | <integer> | inherit
+        if (id == CSSValueAuto)
+            validPrimitive = true;
+        else
+            validPrimitive = (!id && validUnit(value, FInteger, HTMLQuirksMode));
+        break;
+
+    case CSSPropertyLineHeight:
+        return parseLineHeight(important);
+    case CSSPropertyCounterIncrement:    // [ <identifier> <integer>? ]+ | none | inherit
+        if (id != CSSValueNone)
+            return parseCounter(propId, 1, important);
+        validPrimitive = true;
+        break;
+    case CSSPropertyCounterReset:        // [ <identifier> <integer>? ]+ | none | inherit
+        if (id != CSSValueNone)
+            return parseCounter(propId, 0, important);
+        validPrimitive = true;
+        break;
+    case CSSPropertyFontFamily:
+        // [[ <family-name> | <generic-family> ],]* [<family-name> | <generic-family>] | inherit
+    {
+        parsedValue = parseFontFamily();
+        break;
+    }
+
+    case CSSPropertyTextDecoration:
+        // Fall through 'text-decoration-line' parsing if CSS 3 Text Decoration
+        // is disabled to match CSS 2.1 rules for parsing 'text-decoration'.
+        if (RuntimeEnabledFeatures::css3TextDecorationsEnabled()) {
+            // [ <text-decoration-line> || <text-decoration-style> || <text-decoration-color> ] | inherit
+            return parseShorthand(CSSPropertyTextDecoration, textDecorationShorthand(), important);
+        }
+    case CSSPropertyWebkitTextDecorationsInEffect:
+    case CSSPropertyTextDecorationLine:
+        // none | [ underline || overline || line-through || blink ] | inherit
+        return parseTextDecoration(propId, important);
+
+    case CSSPropertyTextDecorationStyle:
+        // solid | double | dotted | dashed | wavy
+        if (RuntimeEnabledFeatures::css3TextDecorationsEnabled()
+            && (id == CSSValueSolid || id == CSSValueDouble || id == CSSValueDotted || id == CSSValueDashed || id == CSSValueWavy))
+            validPrimitive = true;
+        break;
+
+    case CSSPropertyTextUnderlinePosition:
+        // auto | under | inherit
+        if (RuntimeEnabledFeatures::css3TextDecorationsEnabled())
+            return parseTextUnderlinePosition(important);
+        return false;
+
+    case CSSPropertyZoom:          // normal | reset | document | <number> | <percentage> | inherit
+        if (id == CSSValueNormal || id == CSSValueReset || id == CSSValueDocument)
+            validPrimitive = true;
+        else
+            validPrimitive = (!id && validUnit(value, FNumber | FPercent | FNonNeg, HTMLStandardMode));
+        break;
+
+    case CSSPropertySrc: // Only used within @font-face and @-webkit-filter, so cannot use inherit | initial or be !important. This is a list of urls or local references.
+        return parseFontFaceSrc();
+
+    case CSSPropertyUnicodeRange:
+        return parseFontFaceUnicodeRange();
+
+    /* CSS3 properties */
+
+    case CSSPropertyBorderImage:
+    case CSSPropertyWebkitMaskBoxImage:
+        return parseBorderImageShorthand(propId, important);
+    case CSSPropertyWebkitBorderImage: {
+        if (RefPtrWillBeRawPtr<CSSValue> result = parseBorderImage(propId)) {
+            addProperty(propId, result, important);
+            return true;
+        }
+        return false;
+    }
+
+    case CSSPropertyBorderImageOutset:
+    case CSSPropertyWebkitMaskBoxImageOutset: {
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> result;
+        if (parseBorderImageOutset(result)) {
+            addProperty(propId, result, important);
+            return true;
+        }
+        break;
+    }
+    case CSSPropertyBorderImageRepeat:
+    case CSSPropertyWebkitMaskBoxImageRepeat: {
+        RefPtrWillBeRawPtr<CSSValue> result;
+        if (parseBorderImageRepeat(result)) {
+            addProperty(propId, result, important);
+            return true;
+        }
+        break;
+    }
+    case CSSPropertyBorderImageSlice:
+    case CSSPropertyWebkitMaskBoxImageSlice: {
+        RefPtrWillBeRawPtr<CSSBorderImageSliceValue> result;
+        if (parseBorderImageSlice(propId, result)) {
+            addProperty(propId, result, important);
+            return true;
+        }
+        break;
+    }
+    case CSSPropertyBorderImageWidth:
+    case CSSPropertyWebkitMaskBoxImageWidth: {
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> result;
+        if (parseBorderImageWidth(result)) {
+            addProperty(propId, result, important);
+            return true;
+        }
+        break;
+    }
+    case CSSPropertyBorderTopRightRadius:
+    case CSSPropertyBorderTopLeftRadius:
+    case CSSPropertyBorderBottomLeftRadius:
+    case CSSPropertyBorderBottomRightRadius: {
+        if (num != 1 && num != 2)
+            return false;
+        validPrimitive = validUnit(value, FLength | FPercent | FNonNeg);
+        if (!validPrimitive)
+            return false;
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> parsedValue1 = createPrimitiveNumericValue(value);
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> parsedValue2;
+        if (num == 2) {
+            value = m_valueList->next();
+            validPrimitive = validUnit(value, FLength | FPercent | FNonNeg);
+            if (!validPrimitive)
+                return false;
+            parsedValue2 = createPrimitiveNumericValue(value);
+        } else
+            parsedValue2 = parsedValue1;
+
+        addProperty(propId, createPrimitiveValuePair(parsedValue1.release(), parsedValue2.release()), important);
+        return true;
+    }
+    case CSSPropertyTabSize:
+        validPrimitive = validUnit(value, FInteger | FNonNeg);
+        break;
+    case CSSPropertyWebkitAspectRatio:
+        return parseAspectRatio(important);
+    case CSSPropertyBorderRadius:
+    case CSSPropertyWebkitBorderRadius:
+        return parseBorderRadius(propId, important);
+    case CSSPropertyOutlineOffset:
+        validPrimitive = validUnit(value, FLength);
+        break;
+    case CSSPropertyTextShadow: // CSS2 property, dropped in CSS2.1, back in CSS3, so treat as CSS3
+    case CSSPropertyBoxShadow:
+    case CSSPropertyWebkitBoxShadow:
+        if (id == CSSValueNone)
+            validPrimitive = true;
+        else {
+            RefPtrWillBeRawPtr<CSSValueList> shadowValueList = parseShadow(m_valueList.get(), propId);
+            if (shadowValueList) {
+                addProperty(propId, shadowValueList.release(), important);
+                m_valueList->next();
+                return true;
+            }
+            return false;
+        }
+        break;
+    case CSSPropertyWebkitBoxReflect:
+        if (id == CSSValueNone)
+            validPrimitive = true;
+        else
+            return parseReflect(propId, important);
+        break;
+    case CSSPropertyOpacity:
+        validPrimitive = validUnit(value, FNumber);
+        break;
+    case CSSPropertyWebkitBoxFlex:
+        validPrimitive = validUnit(value, FNumber);
+        break;
+    case CSSPropertyWebkitBoxFlexGroup:
+        validPrimitive = validUnit(value, FInteger | FNonNeg, HTMLStandardMode);
+        break;
+    case CSSPropertyWebkitBoxOrdinalGroup:
+        validPrimitive = validUnit(value, FInteger | FNonNeg, HTMLStandardMode) && value->fValue;
+        break;
+    case CSSPropertyWebkitFilter:
+        if (id == CSSValueNone)
+            validPrimitive = true;
+        else {
+            RefPtrWillBeRawPtr<CSSValue> val = parseFilter();
+            if (val) {
+                addProperty(propId, val, important);
+                return true;
+            }
+            return false;
+        }
+        break;
+    case CSSPropertyFlex: {
+        ShorthandScope scope(this, propId);
+        if (id == CSSValueNone) {
+            addProperty(CSSPropertyFlexGrow, cssValuePool().createValue(0, CSSPrimitiveValue::CSS_NUMBER), important);
+            addProperty(CSSPropertyFlexShrink, cssValuePool().createValue(0, CSSPrimitiveValue::CSS_NUMBER), important);
+            addProperty(CSSPropertyFlexBasis, cssValuePool().createIdentifierValue(CSSValueAuto), important);
+            return true;
+        }
+        return parseFlex(m_valueList.get(), important);
+    }
+    case CSSPropertyFlexBasis:
+        // FIXME: Support intrinsic dimensions too.
+        if (id == CSSValueAuto)
+            validPrimitive = true;
+        else
+            validPrimitive = (!id && validUnit(value, FLength | FPercent | FNonNeg));
+        break;
+    case CSSPropertyFlexGrow:
+    case CSSPropertyFlexShrink:
+        validPrimitive = validUnit(value, FNumber | FNonNeg);
+        break;
+    case CSSPropertyOrder:
+        validPrimitive = validUnit(value, FInteger, HTMLStandardMode);
+        break;
+    case CSSPropertyInternalMarqueeIncrement:
+        if (id == CSSValueSmall || id == CSSValueLarge || id == CSSValueMedium)
+            validPrimitive = true;
+        else
+            validPrimitive = validUnit(value, FLength | FPercent);
+        break;
+    case CSSPropertyInternalMarqueeRepetition:
+        if (id == CSSValueInfinite)
+            validPrimitive = true;
+        else
+            validPrimitive = validUnit(value, FInteger | FNonNeg);
+        break;
+    case CSSPropertyInternalMarqueeSpeed:
+        if (id == CSSValueNormal || id == CSSValueSlow || id == CSSValueFast)
+            validPrimitive = true;
+        else
+            validPrimitive = validUnit(value, FTime | FInteger | FNonNeg);
+        break;
+    case CSSPropertyWebkitTransform:
+        if (id == CSSValueNone)
+            validPrimitive = true;
+        else {
+            RefPtrWillBeRawPtr<CSSValue> transformValue = parseTransform();
+            if (transformValue) {
+                addProperty(propId, transformValue.release(), important);
+                return true;
+            }
+            return false;
+        }
+        break;
+    case CSSPropertyWebkitTransformOrigin:
+    case CSSPropertyWebkitTransformOriginX:
+    case CSSPropertyWebkitTransformOriginY:
+    case CSSPropertyWebkitTransformOriginZ: {
+        RefPtrWillBeRawPtr<CSSValue> val1;
+        RefPtrWillBeRawPtr<CSSValue> val2;
+        RefPtrWillBeRawPtr<CSSValue> val3;
+        CSSPropertyID propId1, propId2, propId3;
+        if (parseTransformOrigin(propId, propId1, propId2, propId3, val1, val2, val3)) {
+            addProperty(propId1, val1.release(), important);
+            if (val2)
+                addProperty(propId2, val2.release(), important);
+            if (val3)
+                addProperty(propId3, val3.release(), important);
+            return true;
+        }
+        return false;
+    }
+    case CSSPropertyWebkitPerspective:
+        if (id == CSSValueNone)
+            validPrimitive = true;
+        else {
+            // Accepting valueless numbers is a quirk of the -webkit prefixed version of the property.
+            if (validUnit(value, FNumber | FLength | FNonNeg)) {
+                RefPtrWillBeRawPtr<CSSValue> val = createPrimitiveNumericValue(value);
+                if (val) {
+                    addProperty(propId, val.release(), important);
+                    return true;
+                }
+                return false;
+            }
+        }
+        break;
+    case CSSPropertyWebkitPerspectiveOrigin:
+    case CSSPropertyWebkitPerspectiveOriginX:
+    case CSSPropertyWebkitPerspectiveOriginY: {
+        RefPtrWillBeRawPtr<CSSValue> val1;
+        RefPtrWillBeRawPtr<CSSValue> val2;
+        CSSPropertyID propId1, propId2;
+        if (parsePerspectiveOrigin(propId, propId1, propId2, val1, val2)) {
+            addProperty(propId1, val1.release(), important);
+            if (val2)
+                addProperty(propId2, val2.release(), important);
+            return true;
+        }
+        return false;
+    }
+    case CSSPropertyAnimationDelay:
+    case CSSPropertyAnimationDirection:
+    case CSSPropertyAnimationDuration:
+    case CSSPropertyAnimationFillMode:
+    case CSSPropertyAnimationName:
+    case CSSPropertyAnimationPlayState:
+    case CSSPropertyAnimationIterationCount:
+    case CSSPropertyAnimationTimingFunction:
+        if (!RuntimeEnabledFeatures::cssAnimationUnprefixedEnabled())
+            break;
+    case CSSPropertyWebkitAnimationDelay:
+    case CSSPropertyWebkitAnimationDirection:
+    case CSSPropertyWebkitAnimationDuration:
+    case CSSPropertyWebkitAnimationFillMode:
+    case CSSPropertyWebkitAnimationName:
+    case CSSPropertyWebkitAnimationPlayState:
+    case CSSPropertyWebkitAnimationIterationCount:
+    case CSSPropertyWebkitAnimationTimingFunction:
+    case CSSPropertyTransitionDelay:
+    case CSSPropertyTransitionDuration:
+    case CSSPropertyTransitionTimingFunction:
+    case CSSPropertyTransitionProperty:
+    case CSSPropertyWebkitTransitionDelay:
+    case CSSPropertyWebkitTransitionDuration:
+    case CSSPropertyWebkitTransitionTimingFunction:
+    case CSSPropertyWebkitTransitionProperty: {
+        RefPtrWillBeRawPtr<CSSValue> val;
+        AnimationParseContext context;
+        if (parseAnimationProperty(propId, val, context)) {
+            addPropertyWithPrefixingVariant(propId, val.release(), important);
+            return true;
+        }
+        return false;
+    }
+
+    case CSSPropertyJustifySelf:
+        if (!RuntimeEnabledFeatures::cssGridLayoutEnabled())
+            return false;
+
+        return parseItemPositionOverflowPosition(propId, important);
+    case CSSPropertyGridAutoColumns:
+    case CSSPropertyGridAutoRows:
+        if (!RuntimeEnabledFeatures::cssGridLayoutEnabled())
+            return false;
+        parsedValue = parseGridTrackSize(*m_valueList);
+        break;
+
+    case CSSPropertyGridTemplateColumns:
+    case CSSPropertyGridTemplateRows:
+        if (!RuntimeEnabledFeatures::cssGridLayoutEnabled())
+            return false;
+        return parseGridTrackList(propId, important);
+
+    case CSSPropertyGridColumnEnd:
+    case CSSPropertyGridColumnStart:
+    case CSSPropertyGridRowEnd:
+    case CSSPropertyGridRowStart:
+        if (!RuntimeEnabledFeatures::cssGridLayoutEnabled())
+            return false;
+        parsedValue = parseGridPosition();
+        break;
+
+    case CSSPropertyGridColumn:
+    case CSSPropertyGridRow:
+        if (!RuntimeEnabledFeatures::cssGridLayoutEnabled())
+            return false;
+        return parseGridItemPositionShorthand(propId, important);
+
+    case CSSPropertyGridArea:
+        if (!RuntimeEnabledFeatures::cssGridLayoutEnabled())
+            return false;
+        return parseGridAreaShorthand(important);
+
+    case CSSPropertyGridTemplateAreas:
+        if (!RuntimeEnabledFeatures::cssGridLayoutEnabled())
+            return false;
+        parsedValue = parseGridTemplateAreas();
+        break;
+
+    case CSSPropertyWebkitMarginCollapse: {
+        if (num == 1) {
+            ShorthandScope scope(this, CSSPropertyWebkitMarginCollapse);
+            if (!parseValue(webkitMarginCollapseShorthand().properties()[0], important))
+                return false;
+            CSSValue* value = m_parsedProperties.last().value();
+            addProperty(webkitMarginCollapseShorthand().properties()[1], value, important);
+            return true;
+        }
+        else if (num == 2) {
+            ShorthandScope scope(this, CSSPropertyWebkitMarginCollapse);
+            if (!parseValue(webkitMarginCollapseShorthand().properties()[0], important) || !parseValue(webkitMarginCollapseShorthand().properties()[1], important))
+                return false;
+            return true;
+        }
+        return false;
+    }
+    case CSSPropertyTextLineThroughWidth:
+    case CSSPropertyTextOverlineWidth:
+    case CSSPropertyTextUnderlineWidth:
+        if (id == CSSValueAuto || id == CSSValueNormal || id == CSSValueThin ||
+            id == CSSValueMedium || id == CSSValueThick)
+            validPrimitive = true;
+        else
+            validPrimitive = !id && validUnit(value, FNumber | FLength | FPercent);
+        break;
+    case CSSPropertyWebkitColumnCount:
+        parsedValue = parseColumnCount();
+        break;
+    case CSSPropertyWebkitColumnGap:         // normal | <length>
+        if (id == CSSValueNormal)
+            validPrimitive = true;
+        else
+            validPrimitive = validUnit(value, FLength | FNonNeg);
+        break;
+    case CSSPropertyWebkitColumnAxis:
+        if (id == CSSValueHorizontal || id == CSSValueVertical || id == CSSValueAuto)
+            validPrimitive = true;
+        break;
+    case CSSPropertyWebkitColumnProgression:
+        if (id == CSSValueNormal || id == CSSValueReverse)
+            validPrimitive = true;
+        break;
+    case CSSPropertyWebkitColumnSpan: // none | all | 1 (will be dropped in the unprefixed property)
+        if (id == CSSValueAll || id == CSSValueNone)
+            validPrimitive = true;
+        else
+            validPrimitive = validUnit(value, FNumber | FNonNeg) && value->fValue == 1;
+        break;
+    case CSSPropertyWebkitColumnWidth:         // auto | <length>
+        parsedValue = parseColumnWidth();
+        break;
+    case CSSPropertyWillChange:
+        if (!RuntimeEnabledFeatures::cssWillChangeEnabled())
+            return false;
+        return parseWillChange(important);
+    // End of CSS3 properties
+
+    // Apple specific properties.  These will never be standardized and are purely to
+    // support custom WebKit-based Apple applications.
+    case CSSPropertyWebkitLineClamp:
+        // When specifying number of lines, don't allow 0 as a valid value
+        // When specifying either type of unit, require non-negative integers
+        validPrimitive = (!id && (value->unit == CSSPrimitiveValue::CSS_PERCENTAGE || value->fValue) && validUnit(value, FInteger | FPercent | FNonNeg, HTMLQuirksMode));
+        break;
+
+    case CSSPropertyWebkitFontSizeDelta:           // <length>
+        validPrimitive = validUnit(value, FLength);
+        break;
+
+    case CSSPropertyWebkitHighlight:
+        if (id == CSSValueNone || value->unit == CSSPrimitiveValue::CSS_STRING)
+            validPrimitive = true;
+        break;
+
+    case CSSPropertyWebkitHyphenateCharacter:
+        if (id == CSSValueAuto || value->unit == CSSPrimitiveValue::CSS_STRING)
+            validPrimitive = true;
+        break;
+
+    case CSSPropertyWebkitLocale:
+        if (id == CSSValueAuto || value->unit == CSSPrimitiveValue::CSS_STRING)
+            validPrimitive = true;
+        break;
+
+    // End Apple-specific properties
+
+    case CSSPropertyWebkitAppRegion:
+        if (id >= CSSValueDrag && id <= CSSValueNoDrag)
+            validPrimitive = true;
+        break;
+
+    case CSSPropertyWebkitTapHighlightColor:
+        if ((id >= CSSValueAqua && id <= CSSValueWindowtext) || id == CSSValueMenu
+            || (id >= CSSValueWebkitFocusRingColor && id < CSSValueWebkitText && inQuirksMode())) {
+            validPrimitive = true;
+        } else {
+            parsedValue = parseColor();
+            if (parsedValue)
+                m_valueList->next();
+        }
+        break;
+
+        /* shorthand properties */
+    case CSSPropertyBackground: {
+        // Position must come before color in this array because a plain old "0" is a legal color
+        // in quirks mode but it's usually the X coordinate of a position.
+        const CSSPropertyID properties[] = { CSSPropertyBackgroundImage, CSSPropertyBackgroundRepeat,
+                                   CSSPropertyBackgroundAttachment, CSSPropertyBackgroundPosition, CSSPropertyBackgroundOrigin,
+                                   CSSPropertyBackgroundClip, CSSPropertyBackgroundColor, CSSPropertyBackgroundSize };
+        return parseFillShorthand(propId, properties, WTF_ARRAY_LENGTH(properties), important);
+    }
+    case CSSPropertyWebkitMask: {
+        const CSSPropertyID properties[] = { CSSPropertyWebkitMaskImage, CSSPropertyWebkitMaskRepeat,
+            CSSPropertyWebkitMaskPosition, CSSPropertyWebkitMaskOrigin, CSSPropertyWebkitMaskClip, CSSPropertyWebkitMaskSize };
+        return parseFillShorthand(propId, properties, WTF_ARRAY_LENGTH(properties), important);
+    }
+    case CSSPropertyBorder:
+        // [ 'border-width' || 'border-style' || <color> ] | inherit
+    {
+        if (parseShorthand(propId, parsingShorthandForProperty(CSSPropertyBorder), important)) {
+            // The CSS3 Borders and Backgrounds specification says that border also resets border-image. It's as
+            // though a value of none was specified for the image.
+            addExpandedPropertyForValue(CSSPropertyBorderImage, cssValuePool().createImplicitInitialValue(), important);
+            return true;
+        }
+        return false;
+    }
+    case CSSPropertyBorderTop:
+        // [ 'border-top-width' || 'border-style' || <color> ] | inherit
+        return parseShorthand(propId, borderTopShorthand(), important);
+    case CSSPropertyBorderRight:
+        // [ 'border-right-width' || 'border-style' || <color> ] | inherit
+        return parseShorthand(propId, borderRightShorthand(), important);
+    case CSSPropertyBorderBottom:
+        // [ 'border-bottom-width' || 'border-style' || <color> ] | inherit
+        return parseShorthand(propId, borderBottomShorthand(), important);
+    case CSSPropertyBorderLeft:
+        // [ 'border-left-width' || 'border-style' || <color> ] | inherit
+        return parseShorthand(propId, borderLeftShorthand(), important);
+    case CSSPropertyWebkitBorderStart:
+        return parseShorthand(propId, webkitBorderStartShorthand(), important);
+    case CSSPropertyWebkitBorderEnd:
+        return parseShorthand(propId, webkitBorderEndShorthand(), important);
+    case CSSPropertyWebkitBorderBefore:
+        return parseShorthand(propId, webkitBorderBeforeShorthand(), important);
+    case CSSPropertyWebkitBorderAfter:
+        return parseShorthand(propId, webkitBorderAfterShorthand(), important);
+    case CSSPropertyOutline:
+        // [ 'outline-color' || 'outline-style' || 'outline-width' ] | inherit
+        return parseShorthand(propId, outlineShorthand(), important);
+    case CSSPropertyBorderColor:
+        // <color>{1,4} | inherit
+        return parse4Values(propId, borderColorShorthand().properties(), important);
+    case CSSPropertyBorderWidth:
+        // <border-width>{1,4} | inherit
+        return parse4Values(propId, borderWidthShorthand().properties(), important);
+    case CSSPropertyBorderStyle:
+        // <border-style>{1,4} | inherit
+        return parse4Values(propId, borderStyleShorthand().properties(), important);
+    case CSSPropertyMargin:
+        // <margin-width>{1,4} | inherit
+        return parse4Values(propId, marginShorthand().properties(), important);
+    case CSSPropertyPadding:
+        // <padding-width>{1,4} | inherit
+        return parse4Values(propId, paddingShorthand().properties(), important);
+    case CSSPropertyFlexFlow:
+        return parseShorthand(propId, flexFlowShorthand(), important);
+    case CSSPropertyFont:
+        // [ [ 'font-style' || 'font-variant' || 'font-weight' ]? 'font-size' [ / 'line-height' ]?
+        // 'font-family' ] | caption | icon | menu | message-box | small-caption | status-bar | inherit
+        if (id >= CSSValueCaption && id <= CSSValueStatusBar)
+            validPrimitive = true;
+        else
+            return parseFont(important);
+        break;
+    case CSSPropertyListStyle:
+        return parseShorthand(propId, listStyleShorthand(), important);
+    case CSSPropertyWebkitColumns:
+        return parseColumnsShorthand(important);
+    case CSSPropertyWebkitColumnRule:
+        return parseShorthand(propId, webkitColumnRuleShorthand(), important);
+    case CSSPropertyWebkitTextStroke:
+        return parseShorthand(propId, webkitTextStrokeShorthand(), important);
+    case CSSPropertyAnimation:
+        if (!RuntimeEnabledFeatures::cssAnimationUnprefixedEnabled())
+            break;
+    case CSSPropertyWebkitAnimation:
+        return parseAnimationShorthand(propId, important);
+    case CSSPropertyTransition:
+    case CSSPropertyWebkitTransition:
+        return parseTransitionShorthand(propId, important);
+    case CSSPropertyInvalid:
+        return false;
+    case CSSPropertyPage:
+        return parsePage(propId, important);
+    case CSSPropertyFontStretch:
+        return false;
+    // CSS Text Layout Module Level 3: Vertical writing support
+    case CSSPropertyWebkitTextEmphasis:
+        return parseShorthand(propId, webkitTextEmphasisShorthand(), important);
+
+    case CSSPropertyWebkitTextEmphasisStyle:
+        return parseTextEmphasisStyle(important);
+
+    case CSSPropertyWebkitTextOrientation:
+        // FIXME: For now just support sideways, sideways-right, upright and vertical-right.
+        if (id == CSSValueSideways || id == CSSValueSidewaysRight || id == CSSValueVerticalRight || id == CSSValueUpright)
+            validPrimitive = true;
+        break;
+
+    case CSSPropertyWebkitLineBoxContain:
+        if (id == CSSValueNone)
+            validPrimitive = true;
+        else
+            return parseLineBoxContain(important);
+        break;
+    case CSSPropertyWebkitFontFeatureSettings:
+        if (id == CSSValueNormal)
+            validPrimitive = true;
+        else
+            return parseFontFeatureSettings(important);
+        break;
+
+    case CSSPropertyFontVariantLigatures:
+        if (id == CSSValueNormal)
+            validPrimitive = true;
+        else
+            return parseFontVariantLigatures(important);
+        break;
+    case CSSPropertyWebkitClipPath:
+        if (id == CSSValueNone) {
+            validPrimitive = true;
+        } else if (value->unit == CSSParserValue::Function) {
+            parsedValue = parseBasicShape();
+        } else if (value->unit == CSSPrimitiveValue::CSS_URI) {
+            parsedValue = CSSPrimitiveValue::create(value->string, CSSPrimitiveValue::CSS_URI);
+            addProperty(propId, parsedValue.release(), important);
+            return true;
+        }
+        break;
+    case CSSPropertyShapeInside:
+    case CSSPropertyShapeOutside:
+        parsedValue = parseShapeProperty(propId);
+        break;
+    case CSSPropertyShapeMargin:
+    case CSSPropertyShapePadding:
+        validPrimitive = (RuntimeEnabledFeatures::cssShapesEnabled() && !id && validUnit(value, FLength | FNonNeg));
+        break;
+    case CSSPropertyShapeImageThreshold:
+        validPrimitive = (RuntimeEnabledFeatures::cssShapesEnabled() && !id && validUnit(value, FNumber));
+        break;
+
+    case CSSPropertyTouchAction:
+        // auto | none | [pan-x || pan-y]
+        return parseTouchAction(important);
+
+    case CSSPropertyAlignSelf:
+        ASSERT(RuntimeEnabledFeatures::cssGridLayoutEnabled());
+        return parseItemPositionOverflowPosition(propId, important);
+
+    case CSSPropertyAlignItems:
+        ASSERT(RuntimeEnabledFeatures::cssGridLayoutEnabled());
+        return parseItemPositionOverflowPosition(propId, important);
+
+    case CSSPropertyBorderBottomStyle:
+    case CSSPropertyBorderCollapse:
+    case CSSPropertyBorderLeftStyle:
+    case CSSPropertyBorderRightStyle:
+    case CSSPropertyBorderTopStyle:
+    case CSSPropertyBoxSizing:
+    case CSSPropertyCaptionSide:
+    case CSSPropertyClear:
+    case CSSPropertyDirection:
+    case CSSPropertyDisplay:
+    case CSSPropertyEmptyCells:
+    case CSSPropertyFloat:
+    case CSSPropertyFontStyle:
+    case CSSPropertyImageRendering:
+    case CSSPropertyListStylePosition:
+    case CSSPropertyListStyleType:
+    case CSSPropertyObjectFit:
+    case CSSPropertyOutlineStyle:
+    case CSSPropertyOverflowWrap:
+    case CSSPropertyOverflowX:
+    case CSSPropertyOverflowY:
+    case CSSPropertyPageBreakAfter:
+    case CSSPropertyPageBreakBefore:
+    case CSSPropertyPageBreakInside:
+    case CSSPropertyPointerEvents:
+    case CSSPropertyPosition:
+    case CSSPropertyResize:
+    case CSSPropertySpeak:
+    case CSSPropertyTableLayout:
+    case CSSPropertyTextAlignLast:
+    case CSSPropertyTextJustify:
+    case CSSPropertyTextLineThroughMode:
+    case CSSPropertyTextLineThroughStyle:
+    case CSSPropertyTextOverflow:
+    case CSSPropertyTextOverlineMode:
+    case CSSPropertyTextOverlineStyle:
+    case CSSPropertyTextRendering:
+    case CSSPropertyTextTransform:
+    case CSSPropertyTextUnderlineMode:
+    case CSSPropertyTextUnderlineStyle:
+    case CSSPropertyTouchActionDelay:
+    case CSSPropertyVisibility:
+    case CSSPropertyWebkitAppearance:
+    case CSSPropertyWebkitBackfaceVisibility:
+    case CSSPropertyWebkitBorderAfterStyle:
+    case CSSPropertyWebkitBorderBeforeStyle:
+    case CSSPropertyWebkitBorderEndStyle:
+    case CSSPropertyWebkitBorderFit:
+    case CSSPropertyWebkitBorderStartStyle:
+    case CSSPropertyWebkitBoxAlign:
+    case CSSPropertyWebkitBoxDecorationBreak:
+    case CSSPropertyWebkitBoxDirection:
+    case CSSPropertyWebkitBoxLines:
+    case CSSPropertyWebkitBoxOrient:
+    case CSSPropertyWebkitBoxPack:
+    case CSSPropertyInternalCallback:
+    case CSSPropertyWebkitColumnBreakAfter:
+    case CSSPropertyWebkitColumnBreakBefore:
+    case CSSPropertyWebkitColumnBreakInside:
+    case CSSPropertyColumnFill:
+    case CSSPropertyWebkitColumnRuleStyle:
+    case CSSPropertyAlignContent:
+    case CSSPropertyFlexDirection:
+    case CSSPropertyFlexWrap:
+    case CSSPropertyJustifyContent:
+    case CSSPropertyFontKerning:
+    case CSSPropertyWebkitFontSmoothing:
+    case CSSPropertyGridAutoFlow:
+    case CSSPropertyWebkitLineBreak:
+    case CSSPropertyWebkitMarginAfterCollapse:
+    case CSSPropertyWebkitMarginBeforeCollapse:
+    case CSSPropertyWebkitMarginBottomCollapse:
+    case CSSPropertyWebkitMarginTopCollapse:
+    case CSSPropertyInternalMarqueeDirection:
+    case CSSPropertyInternalMarqueeStyle:
+    case CSSPropertyWebkitPrintColorAdjust:
+    case CSSPropertyWebkitRtlOrdering:
+    case CSSPropertyWebkitRubyPosition:
+    case CSSPropertyWebkitTextCombine:
+    case CSSPropertyWebkitTextEmphasisPosition:
+    case CSSPropertyWebkitTextSecurity:
+    case CSSPropertyWebkitTransformStyle:
+    case CSSPropertyWebkitUserDrag:
+    case CSSPropertyWebkitUserModify:
+    case CSSPropertyWebkitUserSelect:
+    case CSSPropertyWebkitWrapFlow:
+    case CSSPropertyWebkitWrapThrough:
+    case CSSPropertyWebkitWritingMode:
+    case CSSPropertyWhiteSpace:
+    case CSSPropertyWordBreak:
+    case CSSPropertyWordWrap:
+    case CSSPropertyMixBlendMode:
+    case CSSPropertyIsolation:
+        // These properties should be handled before in isValidKeywordPropertyAndValue().
+        ASSERT_NOT_REACHED();
+        return false;
+    // Properties below are validated inside parseViewportProperty, because we
+    // check for parser state. We need to invalidate if someone adds them outside
+    // a @viewport rule.
+    case CSSPropertyMaxZoom:
+    case CSSPropertyMinZoom:
+    case CSSPropertyOrientation:
+    case CSSPropertyUserZoom:
+        validPrimitive = false;
+        break;
+    default:
+        return parseSVGValue(propId, important);
+    }
+
+    if (validPrimitive) {
+        parsedValue = parseValidPrimitive(id, value);
+        m_valueList->next();
+    }
+    ASSERT(!m_parsedCalculation);
+    if (parsedValue) {
+        if (!m_valueList->current() || inShorthand()) {
+            addProperty(propId, parsedValue.release(), important);
+            return true;
+        }
+    }
+    return false;
+}
+
+void CSSPropertyParser::addFillValue(RefPtrWillBeRawPtr<CSSValue>& lval, PassRefPtrWillBeRawPtr<CSSValue> rval)
+{
+    if (lval) {
+        if (lval->isBaseValueList())
+            toCSSValueList(lval.get())->append(rval);
+        else {
+            PassRefPtrWillBeRawPtr<CSSValue> oldlVal(lval.release());
+            PassRefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createCommaSeparated();
+            list->append(oldlVal);
+            list->append(rval);
+            lval = list;
+        }
+    }
+    else
+        lval = rval;
+}
+
+static bool parseBackgroundClip(CSSParserValue* parserValue, RefPtrWillBeRawPtr<CSSValue>& cssValue)
+{
+    if (parserValue->id == CSSValueBorderBox || parserValue->id == CSSValuePaddingBox
+        || parserValue->id == CSSValueContentBox || parserValue->id == CSSValueWebkitText) {
+        cssValue = cssValuePool().createIdentifierValue(parserValue->id);
+        return true;
+    }
+    return false;
+}
+
+const int cMaxFillProperties = 9;
+
+bool CSSPropertyParser::parseFillShorthand(CSSPropertyID propId, const CSSPropertyID* properties, int numProperties, bool important)
+{
+    ASSERT(numProperties <= cMaxFillProperties);
+    if (numProperties > cMaxFillProperties)
+        return false;
+
+    ShorthandScope scope(this, propId);
+
+    bool parsedProperty[cMaxFillProperties] = { false };
+    RefPtrWillBeRawPtr<CSSValue> values[cMaxFillProperties];
+    RefPtrWillBeRawPtr<CSSValue> clipValue;
+    RefPtrWillBeRawPtr<CSSValue> positionYValue;
+    RefPtrWillBeRawPtr<CSSValue> repeatYValue;
+    bool foundClip = false;
+    int i;
+    bool foundPositionCSSProperty = false;
+
+    while (m_valueList->current()) {
+        CSSParserValue* val = m_valueList->current();
+        if (val->unit == CSSParserValue::Operator && val->iValue == ',') {
+            // We hit the end.  Fill in all remaining values with the initial value.
+            m_valueList->next();
+            for (i = 0; i < numProperties; ++i) {
+                if (properties[i] == CSSPropertyBackgroundColor && parsedProperty[i])
+                    // Color is not allowed except as the last item in a list for backgrounds.
+                    // Reject the entire property.
+                    return false;
+
+                if (!parsedProperty[i] && properties[i] != CSSPropertyBackgroundColor) {
+                    addFillValue(values[i], cssValuePool().createImplicitInitialValue());
+                    if (properties[i] == CSSPropertyBackgroundPosition || properties[i] == CSSPropertyWebkitMaskPosition)
+                        addFillValue(positionYValue, cssValuePool().createImplicitInitialValue());
+                    if (properties[i] == CSSPropertyBackgroundRepeat || properties[i] == CSSPropertyWebkitMaskRepeat)
+                        addFillValue(repeatYValue, cssValuePool().createImplicitInitialValue());
+                    if ((properties[i] == CSSPropertyBackgroundOrigin || properties[i] == CSSPropertyWebkitMaskOrigin) && !parsedProperty[i]) {
+                        // If background-origin wasn't present, then reset background-clip also.
+                        addFillValue(clipValue, cssValuePool().createImplicitInitialValue());
+                    }
+                }
+                parsedProperty[i] = false;
+            }
+            if (!m_valueList->current())
+                break;
+        }
+
+        bool sizeCSSPropertyExpected = false;
+        if (isForwardSlashOperator(val) && foundPositionCSSProperty) {
+            sizeCSSPropertyExpected = true;
+            m_valueList->next();
+        }
+
+        foundPositionCSSProperty = false;
+        bool found = false;
+        for (i = 0; !found && i < numProperties; ++i) {
+
+            if (sizeCSSPropertyExpected && (properties[i] != CSSPropertyBackgroundSize && properties[i] != CSSPropertyWebkitMaskSize))
+                continue;
+            if (!sizeCSSPropertyExpected && (properties[i] == CSSPropertyBackgroundSize || properties[i] == CSSPropertyWebkitMaskSize))
+                continue;
+
+            if (!parsedProperty[i]) {
+                RefPtrWillBeRawPtr<CSSValue> val1;
+                RefPtrWillBeRawPtr<CSSValue> val2;
+                CSSPropertyID propId1, propId2;
+                CSSParserValue* parserValue = m_valueList->current();
+                // parseFillProperty() may modify m_implicitShorthand, so we MUST reset it
+                // before EACH return below.
+                if (parseFillProperty(properties[i], propId1, propId2, val1, val2)) {
+                    parsedProperty[i] = found = true;
+                    addFillValue(values[i], val1.release());
+                    if (properties[i] == CSSPropertyBackgroundPosition || properties[i] == CSSPropertyWebkitMaskPosition)
+                        addFillValue(positionYValue, val2.release());
+                    if (properties[i] == CSSPropertyBackgroundRepeat || properties[i] == CSSPropertyWebkitMaskRepeat)
+                        addFillValue(repeatYValue, val2.release());
+                    if (properties[i] == CSSPropertyBackgroundOrigin || properties[i] == CSSPropertyWebkitMaskOrigin) {
+                        // Reparse the value as a clip, and see if we succeed.
+                        if (parseBackgroundClip(parserValue, val1))
+                            addFillValue(clipValue, val1.release()); // The property parsed successfully.
+                        else
+                            addFillValue(clipValue, cssValuePool().createImplicitInitialValue()); // Some value was used for origin that is not supported by clip. Just reset clip instead.
+                    }
+                    if (properties[i] == CSSPropertyBackgroundClip || properties[i] == CSSPropertyWebkitMaskClip) {
+                        // Update clipValue
+                        addFillValue(clipValue, val1.release());
+                        foundClip = true;
+                    }
+                    if (properties[i] == CSSPropertyBackgroundPosition || properties[i] == CSSPropertyWebkitMaskPosition)
+                        foundPositionCSSProperty = true;
+                }
+            }
+        }
+
+        // if we didn't find at least one match, this is an
+        // invalid shorthand and we have to ignore it
+        if (!found) {
+            m_implicitShorthand = false;
+            return false;
+        }
+    }
+
+    // Now add all of the properties we found.
+    for (i = 0; i < numProperties; i++) {
+        // Fill in any remaining properties with the initial value.
+        if (!parsedProperty[i]) {
+            addFillValue(values[i], cssValuePool().createImplicitInitialValue());
+            if (properties[i] == CSSPropertyBackgroundPosition || properties[i] == CSSPropertyWebkitMaskPosition)
+                addFillValue(positionYValue, cssValuePool().createImplicitInitialValue());
+            if (properties[i] == CSSPropertyBackgroundRepeat || properties[i] == CSSPropertyWebkitMaskRepeat)
+                addFillValue(repeatYValue, cssValuePool().createImplicitInitialValue());
+            if (properties[i] == CSSPropertyBackgroundOrigin || properties[i] == CSSPropertyWebkitMaskOrigin) {
+                // If background-origin wasn't present, then reset background-clip also.
+                addFillValue(clipValue, cssValuePool().createImplicitInitialValue());
+            }
+        }
+        if (properties[i] == CSSPropertyBackgroundPosition) {
+            addProperty(CSSPropertyBackgroundPositionX, values[i].release(), important);
+            // it's OK to call positionYValue.release() since we only see CSSPropertyBackgroundPosition once
+            addProperty(CSSPropertyBackgroundPositionY, positionYValue.release(), important);
+        } else if (properties[i] == CSSPropertyWebkitMaskPosition) {
+            addProperty(CSSPropertyWebkitMaskPositionX, values[i].release(), important);
+            // it's OK to call positionYValue.release() since we only see CSSPropertyWebkitMaskPosition once
+            addProperty(CSSPropertyWebkitMaskPositionY, positionYValue.release(), important);
+        } else if (properties[i] == CSSPropertyBackgroundRepeat) {
+            addProperty(CSSPropertyBackgroundRepeatX, values[i].release(), important);
+            // it's OK to call repeatYValue.release() since we only see CSSPropertyBackgroundPosition once
+            addProperty(CSSPropertyBackgroundRepeatY, repeatYValue.release(), important);
+        } else if (properties[i] == CSSPropertyWebkitMaskRepeat) {
+            addProperty(CSSPropertyWebkitMaskRepeatX, values[i].release(), important);
+            // it's OK to call repeatYValue.release() since we only see CSSPropertyBackgroundPosition once
+            addProperty(CSSPropertyWebkitMaskRepeatY, repeatYValue.release(), important);
+        } else if ((properties[i] == CSSPropertyBackgroundClip || properties[i] == CSSPropertyWebkitMaskClip) && !foundClip)
+            // Value is already set while updating origin
+            continue;
+        else if (properties[i] == CSSPropertyBackgroundSize && !parsedProperty[i] && m_context.useLegacyBackgroundSizeShorthandBehavior())
+            continue;
+        else
+            addProperty(properties[i], values[i].release(), important);
+
+        // Add in clip values when we hit the corresponding origin property.
+        if (properties[i] == CSSPropertyBackgroundOrigin && !foundClip)
+            addProperty(CSSPropertyBackgroundClip, clipValue.release(), important);
+        else if (properties[i] == CSSPropertyWebkitMaskOrigin && !foundClip)
+            addProperty(CSSPropertyWebkitMaskClip, clipValue.release(), important);
+    }
+
+    m_implicitShorthand = false;
+    return true;
+}
+
+void CSSPropertyParser::addAnimationValue(RefPtrWillBeRawPtr<CSSValue>& lval, PassRefPtrWillBeRawPtr<CSSValue> rval)
+{
+    if (lval) {
+        if (lval->isValueList())
+            toCSSValueList(lval.get())->append(rval);
+        else {
+            PassRefPtrWillBeRawPtr<CSSValue> oldVal(lval.release());
+            PassRefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createCommaSeparated();
+            list->append(oldVal);
+            list->append(rval);
+            lval = list;
+        }
+    }
+    else
+        lval = rval;
+}
+
+bool CSSPropertyParser::parseAnimationShorthand(CSSPropertyID propId, bool important)
+{
+    const StylePropertyShorthand& animationProperties = parsingShorthandForProperty(propId);
+    const unsigned numProperties = 8;
+
+    // The list of properties in the shorthand should be the same
+    // length as the list with animation name in last position, even though they are
+    // in a different order.
+    ASSERT(numProperties == animationProperties.length());
+    ASSERT(numProperties == shorthandForProperty(propId).length());
+
+    ShorthandScope scope(this, propId);
+
+    bool parsedProperty[numProperties] = { false };
+    AnimationParseContext context;
+    RefPtrWillBeRawPtr<CSSValue> values[numProperties];
+
+    unsigned i;
+    while (m_valueList->current()) {
+        CSSParserValue* val = m_valueList->current();
+        if (val->unit == CSSParserValue::Operator && val->iValue == ',') {
+            // We hit the end.  Fill in all remaining values with the initial value.
+            m_valueList->next();
+            for (i = 0; i < numProperties; ++i) {
+                if (!parsedProperty[i])
+                    addAnimationValue(values[i], cssValuePool().createImplicitInitialValue());
+                parsedProperty[i] = false;
+            }
+            if (!m_valueList->current())
+                break;
+            context.commitFirstAnimation();
+        }
+
+        bool found = false;
+        for (i = 0; i < numProperties; ++i) {
+            if (!parsedProperty[i]) {
+                RefPtrWillBeRawPtr<CSSValue> val;
+                if (parseAnimationProperty(animationProperties.properties()[i], val, context)) {
+                    parsedProperty[i] = found = true;
+                    addAnimationValue(values[i], val.release());
+                    break;
+                }
+            }
+        }
+
+        // if we didn't find at least one match, this is an
+        // invalid shorthand and we have to ignore it
+        if (!found)
+            return false;
+    }
+
+    for (i = 0; i < numProperties; ++i) {
+        // If we didn't find the property, set an intial value.
+        if (!parsedProperty[i])
+            addAnimationValue(values[i], cssValuePool().createImplicitInitialValue());
+
+        if (RuntimeEnabledFeatures::cssAnimationUnprefixedEnabled())
+            addPropertyWithPrefixingVariant(animationProperties.properties()[i], values[i].release(), important);
+        else
+            addProperty(animationProperties.properties()[i], values[i].release(), important);
+    }
+
+    return true;
+}
+
+bool CSSPropertyParser::parseTransitionShorthand(CSSPropertyID propId, bool important)
+{
+    const unsigned numProperties = 4;
+    const StylePropertyShorthand& shorthand = shorthandForProperty(propId);
+    ASSERT(numProperties == shorthand.length());
+
+    ShorthandScope scope(this, propId);
+
+    bool parsedProperty[numProperties] = { false };
+    AnimationParseContext context;
+    RefPtrWillBeRawPtr<CSSValue> values[numProperties];
+
+    unsigned i;
+    while (m_valueList->current()) {
+        CSSParserValue* val = m_valueList->current();
+        if (val->unit == CSSParserValue::Operator && val->iValue == ',') {
+            // We hit the end. Fill in all remaining values with the initial value.
+            m_valueList->next();
+            for (i = 0; i < numProperties; ++i) {
+                if (!parsedProperty[i])
+                    addAnimationValue(values[i], cssValuePool().createImplicitInitialValue());
+                parsedProperty[i] = false;
+            }
+            if (!m_valueList->current())
+                break;
+            context.commitFirstAnimation();
+        }
+
+        bool found = false;
+        for (i = 0; !found && i < numProperties; ++i) {
+            if (!parsedProperty[i]) {
+                RefPtrWillBeRawPtr<CSSValue> val;
+                if (parseAnimationProperty(shorthand.properties()[i], val, context)) {
+                    parsedProperty[i] = found = true;
+                    addAnimationValue(values[i], val.release());
+                }
+
+                // There are more values to process but 'none' or 'all' were already defined as the animation property, the declaration becomes invalid.
+                if (!context.animationPropertyKeywordAllowed() && context.hasCommittedFirstAnimation())
+                    return false;
+            }
+        }
+
+        // if we didn't find at least one match, this is an
+        // invalid shorthand and we have to ignore it
+        if (!found)
+            return false;
+    }
+
+    // Fill in any remaining properties with the initial value.
+    for (i = 0; i < numProperties; ++i) {
+        if (!parsedProperty[i])
+            addAnimationValue(values[i], cssValuePool().createImplicitInitialValue());
+    }
+
+    // Now add all of the properties we found.
+    for (i = 0; i < numProperties; i++)
+        addPropertyWithPrefixingVariant(shorthand.properties()[i], values[i].release(), important);
+
+    return true;
+}
+
+PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseColumnWidth()
+{
+    CSSParserValue* value = m_valueList->current();
+    // Always parse lengths in strict mode here, since it would be ambiguous otherwise when used in
+    // the 'columns' shorthand property.
+    if (value->id == CSSValueAuto
+        || (validUnit(value, FLength | FNonNeg, HTMLStandardMode) && value->fValue)) {
+        RefPtrWillBeRawPtr<CSSValue> parsedValue = parseValidPrimitive(value->id, value);
+        m_valueList->next();
+        return parsedValue;
+    }
+    return nullptr;
+}
+
+PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseColumnCount()
+{
+    CSSParserValue* value = m_valueList->current();
+    if (value->id == CSSValueAuto
+        || (!value->id && validUnit(value, FPositiveInteger, HTMLQuirksMode))) {
+        RefPtrWillBeRawPtr<CSSValue> parsedValue = parseValidPrimitive(value->id, value);
+        m_valueList->next();
+        return parsedValue;
+    }
+    return nullptr;
+}
+
+bool CSSPropertyParser::parseColumnsShorthand(bool important)
+{
+    RefPtrWillBeRawPtr<CSSValue> columnWidth;
+    RefPtrWillBeRawPtr<CSSValue> columnCount;
+    bool hasPendingExplicitAuto = false;
+
+    for (unsigned propertiesParsed = 0; CSSParserValue* value = m_valueList->current(); propertiesParsed++) {
+        if (propertiesParsed >= 2)
+            return false; // Too many values for this shorthand. Invalid declaration.
+        if (!propertiesParsed && value->id == CSSValueAuto) {
+            // 'auto' is a valid value for any of the two longhands, and at this point we
+            // don't know which one(s) it is meant for. We need to see if there are other
+            // values first.
+            m_valueList->next();
+            hasPendingExplicitAuto = true;
+        } else {
+            if (!columnWidth) {
+                if ((columnWidth = parseColumnWidth()))
+                    continue;
+            }
+            if (!columnCount) {
+                if ((columnCount = parseColumnCount()))
+                    continue;
+            }
+            // If we didn't find at least one match, this is an
+            // invalid shorthand and we have to ignore it.
+            return false;
+        }
+    }
+    if (hasPendingExplicitAuto) {
+        // Time to assign the previously skipped 'auto' value to a property. If both properties are
+        // unassigned at this point (i.e. 'columns:auto'), it doesn't matter that much which one we
+        // set (although it does make a slight difference to web-inspector). The one we don't set
+        // here will get an implicit 'auto' value further down.
+        if (!columnWidth) {
+            columnWidth = cssValuePool().createIdentifierValue(CSSValueAuto);
+        } else {
+            ASSERT(!columnCount);
+            columnCount = cssValuePool().createIdentifierValue(CSSValueAuto);
+        }
+    }
+    ASSERT(columnCount || columnWidth);
+
+    // Any unassigned property at this point will become implicit 'auto'.
+    if (columnWidth)
+        addProperty(CSSPropertyWebkitColumnWidth, columnWidth, important);
+    else
+        addProperty(CSSPropertyWebkitColumnWidth, cssValuePool().createIdentifierValue(CSSValueAuto), important, true /* implicit */);
+    if (columnCount)
+        addProperty(CSSPropertyWebkitColumnCount, columnCount, important);
+    else
+        addProperty(CSSPropertyWebkitColumnCount, cssValuePool().createIdentifierValue(CSSValueAuto), important, true /* implicit */);
+    return true;
+}
+
+bool CSSPropertyParser::parseShorthand(CSSPropertyID propId, const StylePropertyShorthand& shorthand, bool important)
+{
+    // We try to match as many properties as possible
+    // We set up an array of booleans to mark which property has been found,
+    // and we try to search for properties until it makes no longer any sense.
+    ShorthandScope scope(this, propId);
+
+    bool found = false;
+    unsigned propertiesParsed = 0;
+    bool propertyFound[6] = { false, false, false, false, false, false }; // 6 is enough size.
+
+    while (m_valueList->current()) {
+        found = false;
+        for (unsigned propIndex = 0; !found && propIndex < shorthand.length(); ++propIndex) {
+            if (!propertyFound[propIndex] && parseValue(shorthand.properties()[propIndex], important)) {
+                propertyFound[propIndex] = found = true;
+                propertiesParsed++;
+            }
+        }
+
+        // if we didn't find at least one match, this is an
+        // invalid shorthand and we have to ignore it
+        if (!found)
+            return false;
+    }
+
+    if (propertiesParsed == shorthand.length())
+        return true;
+
+    // Fill in any remaining properties with the initial value.
+    ImplicitScope implicitScope(this, PropertyImplicit);
+    const StylePropertyShorthand* const* const propertiesForInitialization = shorthand.propertiesForInitialization();
+    for (unsigned i = 0; i < shorthand.length(); ++i) {
+        if (propertyFound[i])
+            continue;
+
+        if (propertiesForInitialization) {
+            const StylePropertyShorthand& initProperties = *(propertiesForInitialization[i]);
+            for (unsigned propIndex = 0; propIndex < initProperties.length(); ++propIndex)
+                addProperty(initProperties.properties()[propIndex], cssValuePool().createImplicitInitialValue(), important);
+        } else
+            addProperty(shorthand.properties()[i], cssValuePool().createImplicitInitialValue(), important);
+    }
+
+    return true;
+}
+
+bool CSSPropertyParser::parse4Values(CSSPropertyID propId, const CSSPropertyID *properties,  bool important)
+{
+    /* From the CSS 2 specs, 8.3
+     * If there is only one value, it applies to all sides. If there are two values, the top and
+     * bottom margins are set to the first value and the right and left margins are set to the second.
+     * If there are three values, the top is set to the first value, the left and right are set to the
+     * second, and the bottom is set to the third. If there are four values, they apply to the top,
+     * right, bottom, and left, respectively.
+     */
+
+    int num = inShorthand() ? 1 : m_valueList->size();
+
+    ShorthandScope scope(this, propId);
+
+    // the order is top, right, bottom, left
+    switch (num) {
+        case 1: {
+            if (!parseValue(properties[0], important))
+                return false;
+            CSSValue* value = m_parsedProperties.last().value();
+            ImplicitScope implicitScope(this, PropertyImplicit);
+            addProperty(properties[1], value, important);
+            addProperty(properties[2], value, important);
+            addProperty(properties[3], value, important);
+            break;
+        }
+        case 2: {
+            if (!parseValue(properties[0], important) || !parseValue(properties[1], important))
+                return false;
+            CSSValue* value = m_parsedProperties[m_parsedProperties.size() - 2].value();
+            ImplicitScope implicitScope(this, PropertyImplicit);
+            addProperty(properties[2], value, important);
+            value = m_parsedProperties[m_parsedProperties.size() - 2].value();
+            addProperty(properties[3], value, important);
+            break;
+        }
+        case 3: {
+            if (!parseValue(properties[0], important) || !parseValue(properties[1], important) || !parseValue(properties[2], important))
+                return false;
+            CSSValue* value = m_parsedProperties[m_parsedProperties.size() - 2].value();
+            ImplicitScope implicitScope(this, PropertyImplicit);
+            addProperty(properties[3], value, important);
+            break;
+        }
+        case 4: {
+            if (!parseValue(properties[0], important) || !parseValue(properties[1], important) ||
+                !parseValue(properties[2], important) || !parseValue(properties[3], important))
+                return false;
+            break;
+        }
+        default: {
+            return false;
+        }
+    }
+
+    return true;
+}
+
+// auto | <identifier>
+bool CSSPropertyParser::parsePage(CSSPropertyID propId, bool important)
+{
+    ASSERT(propId == CSSPropertyPage);
+
+    if (m_valueList->size() != 1)
+        return false;
+
+    CSSParserValue* value = m_valueList->current();
+    if (!value)
+        return false;
+
+    if (value->id == CSSValueAuto) {
+        addProperty(propId, cssValuePool().createIdentifierValue(value->id), important);
+        return true;
+    } else if (value->id == 0 && value->unit == CSSPrimitiveValue::CSS_IDENT) {
+        addProperty(propId, createPrimitiveStringValue(value), important);
+        return true;
+    }
+    return false;
+}
+
+// <length>{1,2} | auto | [ <page-size> || [ portrait | landscape] ]
+bool CSSPropertyParser::parseSize(CSSPropertyID propId, bool important)
+{
+    ASSERT(propId == CSSPropertySize);
+
+    if (m_valueList->size() > 2)
+        return false;
+
+    CSSParserValue* value = m_valueList->current();
+    if (!value)
+        return false;
+
+    RefPtrWillBeRawPtr<CSSValueList> parsedValues = CSSValueList::createSpaceSeparated();
+
+    // First parameter.
+    SizeParameterType paramType = parseSizeParameter(parsedValues.get(), value, None);
+    if (paramType == None)
+        return false;
+
+    // Second parameter, if any.
+    value = m_valueList->next();
+    if (value) {
+        paramType = parseSizeParameter(parsedValues.get(), value, paramType);
+        if (paramType == None)
+            return false;
+    }
+
+    addProperty(propId, parsedValues.release(), important);
+    return true;
+}
+
+CSSPropertyParser::SizeParameterType CSSPropertyParser::parseSizeParameter(CSSValueList* parsedValues, CSSParserValue* value, SizeParameterType prevParamType)
+{
+    switch (value->id) {
+    case CSSValueAuto:
+        if (prevParamType == None) {
+            parsedValues->append(cssValuePool().createIdentifierValue(value->id));
+            return Auto;
+        }
+        return None;
+    case CSSValueLandscape:
+    case CSSValuePortrait:
+        if (prevParamType == None || prevParamType == PageSize) {
+            parsedValues->append(cssValuePool().createIdentifierValue(value->id));
+            return Orientation;
+        }
+        return None;
+    case CSSValueA3:
+    case CSSValueA4:
+    case CSSValueA5:
+    case CSSValueB4:
+    case CSSValueB5:
+    case CSSValueLedger:
+    case CSSValueLegal:
+    case CSSValueLetter:
+        if (prevParamType == None || prevParamType == Orientation) {
+            // Normalize to Page Size then Orientation order by prepending.
+            // This is not specified by the CSS3 Paged Media specification, but for simpler processing later (StyleResolver::applyPageSizeProperty).
+            parsedValues->prepend(cssValuePool().createIdentifierValue(value->id));
+            return PageSize;
+        }
+        return None;
+    case 0:
+        if (validUnit(value, FLength | FNonNeg) && (prevParamType == None || prevParamType == Length)) {
+            parsedValues->append(createPrimitiveNumericValue(value));
+            return Length;
+        }
+        return None;
+    default:
+        return None;
+    }
+}
+
+// [ <string> <string> ]+ | inherit | none
+// inherit and none are handled in parseValue.
+bool CSSPropertyParser::parseQuotes(CSSPropertyID propId, bool important)
+{
+    RefPtrWillBeRawPtr<CSSValueList> values = CSSValueList::createCommaSeparated();
+    while (CSSParserValue* val = m_valueList->current()) {
+        RefPtrWillBeRawPtr<CSSValue> parsedValue;
+        if (val->unit == CSSPrimitiveValue::CSS_STRING)
+            parsedValue = CSSPrimitiveValue::create(val->string, CSSPrimitiveValue::CSS_STRING);
+        else
+            break;
+        values->append(parsedValue.release());
+        m_valueList->next();
+    }
+    if (values->length()) {
+        addProperty(propId, values.release(), important);
+        m_valueList->next();
+        return true;
+    }
+    return false;
+}
+
+// [ <string> | <uri> | <counter> | attr(X) | open-quote | close-quote | no-open-quote | no-close-quote ]+ | inherit
+// in CSS 2.1 this got somewhat reduced:
+// [ <string> | attr(X) | open-quote | close-quote | no-open-quote | no-close-quote ]+ | inherit
+bool CSSPropertyParser::parseContent(CSSPropertyID propId, bool important)
+{
+    RefPtrWillBeRawPtr<CSSValueList> values = CSSValueList::createCommaSeparated();
+
+    while (CSSParserValue* val = m_valueList->current()) {
+        RefPtrWillBeRawPtr<CSSValue> parsedValue;
+        if (val->unit == CSSPrimitiveValue::CSS_URI) {
+            // url
+            parsedValue = CSSImageValue::create(val->string, completeURL(val->string));
+        } else if (val->unit == CSSParserValue::Function) {
+            // attr(X) | counter(X [,Y]) | counters(X, Y, [,Z]) | -webkit-gradient(...)
+            CSSParserValueList* args = val->function->args.get();
+            if (!args)
+                return false;
+            if (equalIgnoringCase(val->function->name, "attr(")) {
+                parsedValue = parseAttr(args);
+                if (!parsedValue)
+                    return false;
+            } else if (equalIgnoringCase(val->function->name, "counter(")) {
+                parsedValue = parseCounterContent(args, false);
+                if (!parsedValue)
+                    return false;
+            } else if (equalIgnoringCase(val->function->name, "counters(")) {
+                parsedValue = parseCounterContent(args, true);
+                if (!parsedValue)
+                    return false;
+            } else if (equalIgnoringCase(val->function->name, "-webkit-image-set(")) {
+                parsedValue = parseImageSet(m_valueList.get());
+                if (!parsedValue)
+                    return false;
+            } else if (isGeneratedImageValue(val)) {
+                if (!parseGeneratedImage(m_valueList.get(), parsedValue))
+                    return false;
+            } else
+                return false;
+        } else if (val->unit == CSSPrimitiveValue::CSS_IDENT) {
+            // open-quote
+            // close-quote
+            // no-open-quote
+            // no-close-quote
+            // inherit
+            // FIXME: These are not yet implemented (http://bugs.webkit.org/show_bug.cgi?id=6503).
+            // none
+            // normal
+            switch (val->id) {
+            case CSSValueOpenQuote:
+            case CSSValueCloseQuote:
+            case CSSValueNoOpenQuote:
+            case CSSValueNoCloseQuote:
+            case CSSValueNone:
+            case CSSValueNormal:
+                parsedValue = cssValuePool().createIdentifierValue(val->id);
+            default:
+                break;
+            }
+        } else if (val->unit == CSSPrimitiveValue::CSS_STRING) {
+            parsedValue = createPrimitiveStringValue(val);
+        }
+        if (!parsedValue)
+            break;
+        values->append(parsedValue.release());
+        m_valueList->next();
+    }
+
+    if (values->length()) {
+        addProperty(propId, values.release(), important);
+        m_valueList->next();
+        return true;
+    }
+
+    return false;
+}
+
+PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseAttr(CSSParserValueList* args)
+{
+    if (args->size() != 1)
+        return nullptr;
+
+    CSSParserValue* a = args->current();
+
+    if (a->unit != CSSPrimitiveValue::CSS_IDENT)
+        return nullptr;
+
+    String attrName = a->string;
+    // CSS allows identifiers with "-" at the start, like "-webkit-mask-image".
+    // But HTML attribute names can't have those characters, and we should not
+    // even parse them inside attr().
+    if (attrName[0] == '-')
+        return nullptr;
+
+    if (m_context.isHTMLDocument())
+        attrName = attrName.lower();
+
+    return cssValuePool().createValue(attrName, CSSPrimitiveValue::CSS_ATTR);
+}
+
+PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseBackgroundColor()
+{
+    CSSValueID id = m_valueList->current()->id;
+    if (id == CSSValueWebkitText || (id >= CSSValueAqua && id <= CSSValueWindowtext) || id == CSSValueMenu || id == CSSValueCurrentcolor ||
+        (id >= CSSValueGrey && id < CSSValueWebkitText && inQuirksMode()))
+        return cssValuePool().createIdentifierValue(id);
+    return parseColor();
+}
+
+bool CSSPropertyParser::parseFillImage(CSSParserValueList* valueList, RefPtrWillBeRawPtr<CSSValue>& value)
+{
+    if (valueList->current()->id == CSSValueNone) {
+        value = cssValuePool().createIdentifierValue(CSSValueNone);
+        return true;
+    }
+    if (valueList->current()->unit == CSSPrimitiveValue::CSS_URI) {
+        value = CSSImageValue::create(valueList->current()->string, completeURL(valueList->current()->string));
+        return true;
+    }
+
+    if (isGeneratedImageValue(valueList->current()))
+        return parseGeneratedImage(valueList, value);
+
+    if (valueList->current()->unit == CSSParserValue::Function && equalIgnoringCase(valueList->current()->function->name, "-webkit-image-set(")) {
+        value = parseImageSet(m_valueList.get());
+        if (value)
+            return true;
+    }
+
+    return false;
+}
+
+PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseFillPositionX(CSSParserValueList* valueList)
+{
+    int id = valueList->current()->id;
+    if (id == CSSValueLeft || id == CSSValueRight || id == CSSValueCenter) {
+        int percent = 0;
+        if (id == CSSValueRight)
+            percent = 100;
+        else if (id == CSSValueCenter)
+            percent = 50;
+        return cssValuePool().createValue(percent, CSSPrimitiveValue::CSS_PERCENTAGE);
+    }
+    if (validUnit(valueList->current(), FPercent | FLength))
+        return createPrimitiveNumericValue(valueList->current());
+    return nullptr;
+}
+
+PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseFillPositionY(CSSParserValueList* valueList)
+{
+    int id = valueList->current()->id;
+    if (id == CSSValueTop || id == CSSValueBottom || id == CSSValueCenter) {
+        int percent = 0;
+        if (id == CSSValueBottom)
+            percent = 100;
+        else if (id == CSSValueCenter)
+            percent = 50;
+        return cssValuePool().createValue(percent, CSSPrimitiveValue::CSS_PERCENTAGE);
+    }
+    if (validUnit(valueList->current(), FPercent | FLength))
+        return createPrimitiveNumericValue(valueList->current());
+    return nullptr;
+}
+
+PassRefPtrWillBeRawPtr<CSSPrimitiveValue> CSSPropertyParser::parseFillPositionComponent(CSSParserValueList* valueList, unsigned& cumulativeFlags, FillPositionFlag& individualFlag, FillPositionParsingMode parsingMode)
+{
+    CSSValueID id = valueList->current()->id;
+    if (id == CSSValueLeft || id == CSSValueTop || id == CSSValueRight || id == CSSValueBottom || id == CSSValueCenter) {
+        int percent = 0;
+        if (id == CSSValueLeft || id == CSSValueRight) {
+            if (cumulativeFlags & XFillPosition)
+                return nullptr;
+            cumulativeFlags |= XFillPosition;
+            individualFlag = XFillPosition;
+            if (id == CSSValueRight)
+                percent = 100;
+        }
+        else if (id == CSSValueTop || id == CSSValueBottom) {
+            if (cumulativeFlags & YFillPosition)
+                return nullptr;
+            cumulativeFlags |= YFillPosition;
+            individualFlag = YFillPosition;
+            if (id == CSSValueBottom)
+                percent = 100;
+        } else if (id == CSSValueCenter) {
+            // Center is ambiguous, so we're not sure which position we've found yet, an x or a y.
+            percent = 50;
+            cumulativeFlags |= AmbiguousFillPosition;
+            individualFlag = AmbiguousFillPosition;
+        }
+
+        if (parsingMode == ResolveValuesAsKeyword)
+            return cssValuePool().createIdentifierValue(id);
+
+        return cssValuePool().createValue(percent, CSSPrimitiveValue::CSS_PERCENTAGE);
+    }
+    if (validUnit(valueList->current(), FPercent | FLength)) {
+        if (!cumulativeFlags) {
+            cumulativeFlags |= XFillPosition;
+            individualFlag = XFillPosition;
+        } else if (cumulativeFlags & (XFillPosition | AmbiguousFillPosition)) {
+            cumulativeFlags |= YFillPosition;
+            individualFlag = YFillPosition;
+        } else {
+            if (m_parsedCalculation)
+                m_parsedCalculation.release();
+            return nullptr;
+        }
+        return createPrimitiveNumericValue(valueList->current());
+    }
+    return nullptr;
+}
+
+static bool isValueConflictingWithCurrentEdge(int value1, int value2)
+{
+    if ((value1 == CSSValueLeft || value1 == CSSValueRight) && (value2 == CSSValueLeft || value2 == CSSValueRight))
+        return true;
+
+    if ((value1 == CSSValueTop || value1 == CSSValueBottom) && (value2 == CSSValueTop || value2 == CSSValueBottom))
+        return true;
+
+    return false;
+}
+
+static bool isFillPositionKeyword(CSSValueID value)
+{
+    return value == CSSValueLeft || value == CSSValueTop || value == CSSValueBottom || value == CSSValueRight || value == CSSValueCenter;
+}
+
+void CSSPropertyParser::parse4ValuesFillPosition(CSSParserValueList* valueList, RefPtrWillBeRawPtr<CSSValue>& value1, RefPtrWillBeRawPtr<CSSValue>& value2, PassRefPtrWillBeRawPtr<CSSPrimitiveValue> parsedValue1, PassRefPtrWillBeRawPtr<CSSPrimitiveValue> parsedValue2)
+{
+    // [ left | right ] [ <percentage] | <length> ] && [ top | bottom ] [ <percentage> | <length> ]
+    // In the case of 4 values <position> requires the second value to be a length or a percentage.
+    if (isFillPositionKeyword(parsedValue2->getValueID()))
+        return;
+
+    unsigned cumulativeFlags = 0;
+    FillPositionFlag value3Flag = InvalidFillPosition;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> value3 = parseFillPositionComponent(valueList, cumulativeFlags, value3Flag, ResolveValuesAsKeyword);
+    if (!value3)
+        return;
+
+    CSSValueID ident1 = parsedValue1->getValueID();
+    CSSValueID ident3 = value3->getValueID();
+
+    if (ident1 == CSSValueCenter)
+        return;
+
+    if (!isFillPositionKeyword(ident3) || ident3 == CSSValueCenter)
+        return;
+
+    // We need to check if the values are not conflicting, e.g. they are not on the same edge. It is
+    // needed as the second call to parseFillPositionComponent was on purpose not checking it. In the
+    // case of two values top 20px is invalid but in the case of 4 values it becomes valid.
+    if (isValueConflictingWithCurrentEdge(ident1, ident3))
+        return;
+
+    valueList->next();
+
+    cumulativeFlags = 0;
+    FillPositionFlag value4Flag = InvalidFillPosition;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> value4 = parseFillPositionComponent(valueList, cumulativeFlags, value4Flag, ResolveValuesAsKeyword);
+    if (!value4)
+        return;
+
+    // 4th value must be a length or a percentage.
+    if (isFillPositionKeyword(value4->getValueID()))
+        return;
+
+    value1 = createPrimitiveValuePair(parsedValue1, parsedValue2);
+    value2 = createPrimitiveValuePair(value3, value4);
+
+    if (ident1 == CSSValueTop || ident1 == CSSValueBottom)
+        value1.swap(value2);
+
+    valueList->next();
+}
+void CSSPropertyParser::parse3ValuesFillPosition(CSSParserValueList* valueList, RefPtrWillBeRawPtr<CSSValue>& value1, RefPtrWillBeRawPtr<CSSValue>& value2, PassRefPtrWillBeRawPtr<CSSPrimitiveValue> parsedValue1, PassRefPtrWillBeRawPtr<CSSPrimitiveValue> parsedValue2)
+{
+    unsigned cumulativeFlags = 0;
+    FillPositionFlag value3Flag = InvalidFillPosition;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> value3 = parseFillPositionComponent(valueList, cumulativeFlags, value3Flag, ResolveValuesAsKeyword);
+
+    // value3 is not an expected value, we return.
+    if (!value3)
+        return;
+
+    valueList->next();
+
+    bool swapNeeded = false;
+    CSSValueID ident1 = parsedValue1->getValueID();
+    CSSValueID ident2 = parsedValue2->getValueID();
+    CSSValueID ident3 = value3->getValueID();
+
+    CSSValueID firstPositionKeyword;
+    CSSValueID secondPositionKeyword;
+
+    if (ident1 == CSSValueCenter) {
+        // <position> requires the first 'center' to be followed by a keyword.
+        if (!isFillPositionKeyword(ident2))
+            return;
+
+        // If 'center' is the first keyword then the last one needs to be a length.
+        if (isFillPositionKeyword(ident3))
+            return;
+
+        firstPositionKeyword = CSSValueLeft;
+        if (ident2 == CSSValueLeft || ident2 == CSSValueRight) {
+            firstPositionKeyword = CSSValueTop;
+            swapNeeded = true;
+        }
+        value1 = createPrimitiveValuePair(cssValuePool().createIdentifierValue(firstPositionKeyword), cssValuePool().createValue(50, CSSPrimitiveValue::CSS_PERCENTAGE));
+        value2 = createPrimitiveValuePair(parsedValue2, value3);
+    } else if (ident3 == CSSValueCenter) {
+        if (isFillPositionKeyword(ident2))
+            return;
+
+        secondPositionKeyword = CSSValueTop;
+        if (ident1 == CSSValueTop || ident1 == CSSValueBottom) {
+            secondPositionKeyword = CSSValueLeft;
+            swapNeeded = true;
+        }
+        value1 = createPrimitiveValuePair(parsedValue1, parsedValue2);
+        value2 = createPrimitiveValuePair(cssValuePool().createIdentifierValue(secondPositionKeyword), cssValuePool().createValue(50, CSSPrimitiveValue::CSS_PERCENTAGE));
+    } else {
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> firstPositionValue;
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> secondPositionValue;
+
+        if (isFillPositionKeyword(ident2)) {
+            // To match CSS grammar, we should only accept: [ center | left | right | bottom | top ] [ left | right | top | bottom ] [ <percentage> | <length> ].
+            ASSERT(ident2 != CSSValueCenter);
+
+            if (isFillPositionKeyword(ident3))
+                return;
+
+            secondPositionValue = value3;
+            secondPositionKeyword = ident2;
+            firstPositionValue = cssValuePool().createValue(0, CSSPrimitiveValue::CSS_PERCENTAGE);
+        } else {
+            // Per CSS, we should only accept: [ right | left | top | bottom ] [ <percentage> | <length> ] [ center | left | right | bottom | top ].
+            if (!isFillPositionKeyword(ident3))
+                return;
+
+            firstPositionValue = parsedValue2;
+            secondPositionKeyword = ident3;
+            secondPositionValue = cssValuePool().createValue(0, CSSPrimitiveValue::CSS_PERCENTAGE);
+        }
+
+        if (isValueConflictingWithCurrentEdge(ident1, secondPositionKeyword))
+            return;
+
+        value1 = createPrimitiveValuePair(parsedValue1, firstPositionValue);
+        value2 = createPrimitiveValuePair(cssValuePool().createIdentifierValue(secondPositionKeyword), secondPositionValue);
+    }
+
+    if (ident1 == CSSValueTop || ident1 == CSSValueBottom || swapNeeded)
+        value1.swap(value2);
+
+#ifndef NDEBUG
+    CSSPrimitiveValue* first = toCSSPrimitiveValue(value1.get());
+    CSSPrimitiveValue* second = toCSSPrimitiveValue(value2.get());
+    ident1 = first->getPairValue()->first()->getValueID();
+    ident2 = second->getPairValue()->first()->getValueID();
+    ASSERT(ident1 == CSSValueLeft || ident1 == CSSValueRight);
+    ASSERT(ident2 == CSSValueBottom || ident2 == CSSValueTop);
+#endif
+}
+
+inline bool CSSPropertyParser::isPotentialPositionValue(CSSParserValue* value)
+{
+    return isFillPositionKeyword(value->id) || validUnit(value, FPercent | FLength, ReleaseParsedCalcValue);
+}
+
+void CSSPropertyParser::parseFillPosition(CSSParserValueList* valueList, RefPtrWillBeRawPtr<CSSValue>& value1, RefPtrWillBeRawPtr<CSSValue>& value2)
+{
+    unsigned numberOfValues = 0;
+    for (unsigned i = valueList->currentIndex(); i < valueList->size(); ++i, ++numberOfValues) {
+        CSSParserValue* current = valueList->valueAt(i);
+        if (isComma(current) || !current || isForwardSlashOperator(current) || !isPotentialPositionValue(current))
+            break;
+    }
+
+    if (numberOfValues > 4)
+        return;
+
+    // If we are parsing two values, we can safely call the CSS 2.1 parsing function and return.
+    if (numberOfValues <= 2) {
+        parse2ValuesFillPosition(valueList, value1, value2);
+        return;
+    }
+
+    ASSERT(numberOfValues > 2 && numberOfValues <= 4);
+
+    CSSParserValue* value = valueList->current();
+
+    // <position> requires the first value to be a background keyword.
+    if (!isFillPositionKeyword(value->id))
+        return;
+
+    // Parse the first value. We're just making sure that it is one of the valid keywords or a percentage/length.
+    unsigned cumulativeFlags = 0;
+    FillPositionFlag value1Flag = InvalidFillPosition;
+    FillPositionFlag value2Flag = InvalidFillPosition;
+    value1 = parseFillPositionComponent(valueList, cumulativeFlags, value1Flag, ResolveValuesAsKeyword);
+    if (!value1)
+        return;
+
+    valueList->next();
+
+    // In case we are parsing more than two values, relax the check inside of parseFillPositionComponent. top 20px is
+    // a valid start for <position>.
+    cumulativeFlags = AmbiguousFillPosition;
+    value2 = parseFillPositionComponent(valueList, cumulativeFlags, value2Flag, ResolveValuesAsKeyword);
+    if (value2)
+        valueList->next();
+    else {
+        value1.clear();
+        return;
+    }
+
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> parsedValue1 = toCSSPrimitiveValue(value1.get());
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> parsedValue2 = toCSSPrimitiveValue(value2.get());
+
+    value1.clear();
+    value2.clear();
+
+    // Per CSS3 syntax, <position> can't have 'center' as its second keyword as we have more arguments to follow.
+    if (parsedValue2->getValueID() == CSSValueCenter)
+        return;
+
+    if (numberOfValues == 3)
+        parse3ValuesFillPosition(valueList, value1, value2, parsedValue1.release(), parsedValue2.release());
+    else
+        parse4ValuesFillPosition(valueList, value1, value2, parsedValue1.release(), parsedValue2.release());
+}
+
+void CSSPropertyParser::parse2ValuesFillPosition(CSSParserValueList* valueList, RefPtrWillBeRawPtr<CSSValue>& value1, RefPtrWillBeRawPtr<CSSValue>& value2)
+{
+    CSSParserValue* value = valueList->current();
+
+    // Parse the first value.  We're just making sure that it is one of the valid keywords or a percentage/length.
+    unsigned cumulativeFlags = 0;
+    FillPositionFlag value1Flag = InvalidFillPosition;
+    FillPositionFlag value2Flag = InvalidFillPosition;
+    value1 = parseFillPositionComponent(valueList, cumulativeFlags, value1Flag);
+    if (!value1)
+        return;
+
+    // It only takes one value for background-position to be correctly parsed if it was specified in a shorthand (since we
+    // can assume that any other values belong to the rest of the shorthand).  If we're not parsing a shorthand, though, the
+    // value was explicitly specified for our property.
+    value = valueList->next();
+
+    // First check for the comma.  If so, we are finished parsing this value or value pair.
+    if (isComma(value))
+        value = 0;
+
+    if (value) {
+        value2 = parseFillPositionComponent(valueList, cumulativeFlags, value2Flag);
+        if (value2)
+            valueList->next();
+        else {
+            if (!inShorthand()) {
+                value1.clear();
+                return;
+            }
+        }
+    }
+
+    if (!value2)
+        // Only one value was specified. If that value was not a keyword, then it sets the x position, and the y position
+        // is simply 50%. This is our default.
+        // For keywords, the keyword was either an x-keyword (left/right), a y-keyword (top/bottom), or an ambiguous keyword (center).
+        // For left/right/center, the default of 50% in the y is still correct.
+        value2 = cssValuePool().createValue(50, CSSPrimitiveValue::CSS_PERCENTAGE);
+
+    if (value1Flag == YFillPosition || value2Flag == XFillPosition)
+        value1.swap(value2);
+}
+
+void CSSPropertyParser::parseFillRepeat(RefPtrWillBeRawPtr<CSSValue>& value1, RefPtrWillBeRawPtr<CSSValue>& value2)
+{
+    CSSValueID id = m_valueList->current()->id;
+    if (id == CSSValueRepeatX) {
+        m_implicitShorthand = true;
+        value1 = cssValuePool().createIdentifierValue(CSSValueRepeat);
+        value2 = cssValuePool().createIdentifierValue(CSSValueNoRepeat);
+        m_valueList->next();
+        return;
+    }
+    if (id == CSSValueRepeatY) {
+        m_implicitShorthand = true;
+        value1 = cssValuePool().createIdentifierValue(CSSValueNoRepeat);
+        value2 = cssValuePool().createIdentifierValue(CSSValueRepeat);
+        m_valueList->next();
+        return;
+    }
+    if (id == CSSValueRepeat || id == CSSValueNoRepeat || id == CSSValueRound || id == CSSValueSpace)
+        value1 = cssValuePool().createIdentifierValue(id);
+    else {
+        value1 = nullptr;
+        return;
+    }
+
+    CSSParserValue* value = m_valueList->next();
+
+    // Parse the second value if one is available
+    if (value && !isComma(value)) {
+        id = value->id;
+        if (id == CSSValueRepeat || id == CSSValueNoRepeat || id == CSSValueRound || id == CSSValueSpace) {
+            value2 = cssValuePool().createIdentifierValue(id);
+            m_valueList->next();
+            return;
+        }
+    }
+
+    // If only one value was specified, value2 is the same as value1.
+    m_implicitShorthand = true;
+    value2 = cssValuePool().createIdentifierValue(toCSSPrimitiveValue(value1.get())->getValueID());
+}
+
+PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseFillSize(CSSPropertyID propId, bool& allowComma)
+{
+    allowComma = true;
+    CSSParserValue* value = m_valueList->current();
+
+    if (value->id == CSSValueContain || value->id == CSSValueCover)
+        return cssValuePool().createIdentifierValue(value->id);
+
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> parsedValue1;
+
+    if (value->id == CSSValueAuto)
+        parsedValue1 = cssValuePool().createIdentifierValue(CSSValueAuto);
+    else {
+        if (!validUnit(value, FLength | FPercent))
+            return nullptr;
+        parsedValue1 = createPrimitiveNumericValue(value);
+    }
+
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> parsedValue2;
+    if ((value = m_valueList->next())) {
+        if (value->unit == CSSParserValue::Operator && value->iValue == ',')
+            allowComma = false;
+        else if (value->id != CSSValueAuto) {
+            if (!validUnit(value, FLength | FPercent)) {
+                if (!inShorthand())
+                    return nullptr;
+                // We need to rewind the value list, so that when it is advanced we'll end up back at this value.
+                m_valueList->previous();
+            } else
+                parsedValue2 = createPrimitiveNumericValue(value);
+        }
+    } else if (!parsedValue2 && propId == CSSPropertyWebkitBackgroundSize) {
+        // For backwards compatibility we set the second value to the first if it is omitted.
+        // We only need to do this for -webkit-background-size. It should be safe to let masks match
+        // the real property.
+        parsedValue2 = parsedValue1;
+    }
+
+    if (!parsedValue2)
+        return parsedValue1;
+    return createPrimitiveValuePair(parsedValue1.release(), parsedValue2.release());
+}
+
+bool CSSPropertyParser::parseFillProperty(CSSPropertyID propId, CSSPropertyID& propId1, CSSPropertyID& propId2,
+    RefPtrWillBeRawPtr<CSSValue>& retValue1, RefPtrWillBeRawPtr<CSSValue>& retValue2)
+{
+    RefPtrWillBeRawPtr<CSSValueList> values;
+    RefPtrWillBeRawPtr<CSSValueList> values2;
+    CSSParserValue* val;
+    RefPtrWillBeRawPtr<CSSValue> value;
+    RefPtrWillBeRawPtr<CSSValue> value2;
+
+    bool allowComma = false;
+
+    retValue1 = retValue2 = nullptr;
+    propId1 = propId;
+    propId2 = propId;
+    if (propId == CSSPropertyBackgroundPosition) {
+        propId1 = CSSPropertyBackgroundPositionX;
+        propId2 = CSSPropertyBackgroundPositionY;
+    } else if (propId == CSSPropertyWebkitMaskPosition) {
+        propId1 = CSSPropertyWebkitMaskPositionX;
+        propId2 = CSSPropertyWebkitMaskPositionY;
+    } else if (propId == CSSPropertyBackgroundRepeat) {
+        propId1 = CSSPropertyBackgroundRepeatX;
+        propId2 = CSSPropertyBackgroundRepeatY;
+    } else if (propId == CSSPropertyWebkitMaskRepeat) {
+        propId1 = CSSPropertyWebkitMaskRepeatX;
+        propId2 = CSSPropertyWebkitMaskRepeatY;
+    }
+
+    while ((val = m_valueList->current())) {
+        RefPtrWillBeRawPtr<CSSValue> currValue;
+        RefPtrWillBeRawPtr<CSSValue> currValue2;
+
+        if (allowComma) {
+            if (!isComma(val))
+                return false;
+            m_valueList->next();
+            allowComma = false;
+        } else {
+            allowComma = true;
+            switch (propId) {
+                case CSSPropertyBackgroundColor:
+                    currValue = parseBackgroundColor();
+                    if (currValue)
+                        m_valueList->next();
+                    break;
+                case CSSPropertyBackgroundAttachment:
+                    if (val->id == CSSValueScroll || val->id == CSSValueFixed || val->id == CSSValueLocal) {
+                        currValue = cssValuePool().createIdentifierValue(val->id);
+                        m_valueList->next();
+                    }
+                    break;
+                case CSSPropertyBackgroundImage:
+                case CSSPropertyWebkitMaskImage:
+                    if (parseFillImage(m_valueList.get(), currValue))
+                        m_valueList->next();
+                    break;
+                case CSSPropertyWebkitBackgroundClip:
+                case CSSPropertyWebkitBackgroundOrigin:
+                case CSSPropertyWebkitMaskClip:
+                case CSSPropertyWebkitMaskOrigin:
+                    // The first three values here are deprecated and do not apply to the version of the property that has
+                    // the -webkit- prefix removed.
+                    if (val->id == CSSValueBorder || val->id == CSSValuePadding || val->id == CSSValueContent ||
+                        val->id == CSSValueBorderBox || val->id == CSSValuePaddingBox || val->id == CSSValueContentBox ||
+                        ((propId == CSSPropertyWebkitBackgroundClip || propId == CSSPropertyWebkitMaskClip) &&
+                         (val->id == CSSValueText || val->id == CSSValueWebkitText))) {
+                        currValue = cssValuePool().createIdentifierValue(val->id);
+                        m_valueList->next();
+                    }
+                    break;
+                case CSSPropertyBackgroundClip:
+                    if (parseBackgroundClip(val, currValue))
+                        m_valueList->next();
+                    break;
+                case CSSPropertyBackgroundOrigin:
+                    if (val->id == CSSValueBorderBox || val->id == CSSValuePaddingBox || val->id == CSSValueContentBox) {
+                        currValue = cssValuePool().createIdentifierValue(val->id);
+                        m_valueList->next();
+                    }
+                    break;
+                case CSSPropertyBackgroundPosition:
+                case CSSPropertyWebkitMaskPosition:
+                    parseFillPosition(m_valueList.get(), currValue, currValue2);
+                    // parseFillPosition advances the m_valueList pointer.
+                    break;
+                case CSSPropertyBackgroundPositionX:
+                case CSSPropertyWebkitMaskPositionX: {
+                    currValue = parseFillPositionX(m_valueList.get());
+                    if (currValue)
+                        m_valueList->next();
+                    break;
+                }
+                case CSSPropertyBackgroundPositionY:
+                case CSSPropertyWebkitMaskPositionY: {
+                    currValue = parseFillPositionY(m_valueList.get());
+                    if (currValue)
+                        m_valueList->next();
+                    break;
+                }
+                case CSSPropertyWebkitBackgroundComposite:
+                case CSSPropertyWebkitMaskComposite:
+                    if (val->id >= CSSValueClear && val->id <= CSSValuePlusLighter) {
+                        currValue = cssValuePool().createIdentifierValue(val->id);
+                        m_valueList->next();
+                    }
+                    break;
+                case CSSPropertyBackgroundBlendMode:
+                    if (val->id == CSSValueNormal || val->id == CSSValueMultiply
+                        || val->id == CSSValueScreen || val->id == CSSValueOverlay || val->id == CSSValueDarken
+                        || val->id == CSSValueLighten ||  val->id == CSSValueColorDodge || val->id == CSSValueColorBurn
+                        || val->id == CSSValueHardLight || val->id == CSSValueSoftLight || val->id == CSSValueDifference
+                        || val->id == CSSValueExclusion || val->id == CSSValueHue || val->id == CSSValueSaturation
+                        || val->id == CSSValueColor || val->id == CSSValueLuminosity) {
+                        currValue = cssValuePool().createIdentifierValue(val->id);
+                        m_valueList->next();
+                    }
+                    break;
+                case CSSPropertyBackgroundRepeat:
+                case CSSPropertyWebkitMaskRepeat:
+                    parseFillRepeat(currValue, currValue2);
+                    // parseFillRepeat advances the m_valueList pointer
+                    break;
+                case CSSPropertyBackgroundSize:
+                case CSSPropertyWebkitBackgroundSize:
+                case CSSPropertyWebkitMaskSize: {
+                    currValue = parseFillSize(propId, allowComma);
+                    if (currValue)
+                        m_valueList->next();
+                    break;
+                }
+                case CSSPropertyMaskSourceType: {
+                    if (RuntimeEnabledFeatures::cssMaskSourceTypeEnabled()) {
+                        if (val->id == CSSValueAuto || val->id == CSSValueAlpha || val->id == CSSValueLuminance) {
+                            currValue = cssValuePool().createIdentifierValue(val->id);
+                            m_valueList->next();
+                        } else {
+                            currValue = nullptr;
+                        }
+                    }
+                    break;
+                }
+                default:
+                    break;
+            }
+            if (!currValue)
+                return false;
+
+            if (value && !values) {
+                values = CSSValueList::createCommaSeparated();
+                values->append(value.release());
+            }
+
+            if (value2 && !values2) {
+                values2 = CSSValueList::createCommaSeparated();
+                values2->append(value2.release());
+            }
+
+            if (values)
+                values->append(currValue.release());
+            else
+                value = currValue.release();
+            if (currValue2) {
+                if (values2)
+                    values2->append(currValue2.release());
+                else
+                    value2 = currValue2.release();
+            }
+        }
+
+        // When parsing any fill shorthand property, we let it handle building up the lists for all
+        // properties.
+        if (inShorthand())
+            break;
+    }
+
+    if (values && values->length()) {
+        retValue1 = values.release();
+        if (values2 && values2->length())
+            retValue2 = values2.release();
+        return true;
+    }
+    if (value) {
+        retValue1 = value.release();
+        retValue2 = value2.release();
+        return true;
+    }
+    return false;
+}
+
+PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseAnimationDelay()
+{
+    CSSParserValue* value = m_valueList->current();
+    if (validUnit(value, FTime))
+        return createPrimitiveNumericValue(value);
+    return nullptr;
+}
+
+PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseAnimationDirection()
+{
+    CSSParserValue* value = m_valueList->current();
+    if (value->id == CSSValueNormal || value->id == CSSValueAlternate || value->id == CSSValueReverse || value->id == CSSValueAlternateReverse)
+        return cssValuePool().createIdentifierValue(value->id);
+    return nullptr;
+}
+
+PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseAnimationDuration()
+{
+    CSSParserValue* value = m_valueList->current();
+    if (validUnit(value, FTime | FNonNeg))
+        return createPrimitiveNumericValue(value);
+    return nullptr;
+}
+
+PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseAnimationFillMode()
+{
+    CSSParserValue* value = m_valueList->current();
+    if (value->id == CSSValueNone || value->id == CSSValueForwards || value->id == CSSValueBackwards || value->id == CSSValueBoth)
+        return cssValuePool().createIdentifierValue(value->id);
+    return nullptr;
+}
+
+PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseAnimationIterationCount()
+{
+    CSSParserValue* value = m_valueList->current();
+    if (value->id == CSSValueInfinite)
+        return cssValuePool().createIdentifierValue(value->id);
+    if (validUnit(value, FNumber | FNonNeg))
+        return createPrimitiveNumericValue(value);
+    return nullptr;
+}
+
+PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseAnimationName()
+{
+    CSSParserValue* value = m_valueList->current();
+    if (value->unit == CSSPrimitiveValue::CSS_STRING || value->unit == CSSPrimitiveValue::CSS_IDENT) {
+        if (value->id == CSSValueNone || (value->unit == CSSPrimitiveValue::CSS_STRING && equalIgnoringCase(value, "none"))) {
+            return cssValuePool().createIdentifierValue(CSSValueNone);
+        } else {
+            return createPrimitiveStringValue(value);
+        }
+    }
+    return nullptr;
+}
+
+PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseAnimationPlayState()
+{
+    CSSParserValue* value = m_valueList->current();
+    if (value->id == CSSValueRunning || value->id == CSSValuePaused)
+        return cssValuePool().createIdentifierValue(value->id);
+    return nullptr;
+}
+
+PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseAnimationProperty(AnimationParseContext& context)
+{
+    CSSParserValue* value = m_valueList->current();
+    if (value->unit != CSSPrimitiveValue::CSS_IDENT)
+        return nullptr;
+    CSSPropertyID result = cssPropertyID(value->string);
+    if (result)
+        return cssValuePool().createIdentifierValue(result);
+    if (equalIgnoringCase(value, "all")) {
+        context.sawAnimationPropertyKeyword();
+        return cssValuePool().createIdentifierValue(CSSValueAll);
+    }
+    if (equalIgnoringCase(value, "none")) {
+        context.commitAnimationPropertyKeyword();
+        context.sawAnimationPropertyKeyword();
+        return cssValuePool().createIdentifierValue(CSSValueNone);
+    }
+    return nullptr;
+}
+
+bool CSSPropertyParser::parseTransformOriginShorthand(RefPtrWillBeRawPtr<CSSValue>& value1, RefPtrWillBeRawPtr<CSSValue>& value2, RefPtrWillBeRawPtr<CSSValue>& value3)
+{
+    parse2ValuesFillPosition(m_valueList.get(), value1, value2);
+
+    // now get z
+    if (m_valueList->current()) {
+        if (validUnit(m_valueList->current(), FLength)) {
+            value3 = createPrimitiveNumericValue(m_valueList->current());
+            m_valueList->next();
+            return true;
+        }
+        return false;
+    }
+    value3 = cssValuePool().createImplicitInitialValue();
+    return true;
+}
+
+bool CSSPropertyParser::parseCubicBezierTimingFunctionValue(CSSParserValueList*& args, double& result)
+{
+    CSSParserValue* v = args->current();
+    if (!validUnit(v, FNumber))
+        return false;
+    result = v->fValue;
+    v = args->next();
+    if (!v)
+        // The last number in the function has no comma after it, so we're done.
+        return true;
+    if (!isComma(v))
+        return false;
+    args->next();
+    return true;
+}
+
+PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseAnimationTimingFunction()
+{
+    CSSParserValue* value = m_valueList->current();
+    if (value->id == CSSValueEase || value->id == CSSValueLinear || value->id == CSSValueEaseIn || value->id == CSSValueEaseOut
+        || value->id == CSSValueEaseInOut || value->id == CSSValueStepStart || value->id == CSSValueStepEnd)
+        return cssValuePool().createIdentifierValue(value->id);
+
+    // We must be a function.
+    if (value->unit != CSSParserValue::Function)
+        return nullptr;
+
+    CSSParserValueList* args = value->function->args.get();
+
+    if (equalIgnoringCase(value->function->name, "steps(")) {
+        // For steps, 1 or 2 params must be specified (comma-separated)
+        if (!args || (args->size() != 1 && args->size() != 3))
+            return nullptr;
+
+        // There are two values.
+        int numSteps;
+        bool stepAtStart = false;
+
+        CSSParserValue* v = args->current();
+        if (!validUnit(v, FInteger))
+            return nullptr;
+        numSteps = clampToInteger(v->fValue);
+        if (numSteps < 1)
+            return nullptr;
+        v = args->next();
+
+        if (v) {
+            // There is a comma so we need to parse the second value
+            if (!isComma(v))
+                return nullptr;
+            v = args->next();
+            if (v->id != CSSValueStart && v->id != CSSValueEnd)
+                return nullptr;
+            stepAtStart = v->id == CSSValueStart;
+        }
+
+        return CSSStepsTimingFunctionValue::create(numSteps, stepAtStart);
+    }
+
+    if (equalIgnoringCase(value->function->name, "cubic-bezier(")) {
+        // For cubic bezier, 4 values must be specified.
+        if (!args || args->size() != 7)
+            return nullptr;
+
+        // There are two points specified. The x values must be between 0 and 1 but the y values can exceed this range.
+        double x1, y1, x2, y2;
+
+        if (!parseCubicBezierTimingFunctionValue(args, x1))
+            return nullptr;
+        if (x1 < 0 || x1 > 1)
+            return nullptr;
+        if (!parseCubicBezierTimingFunctionValue(args, y1))
+            return nullptr;
+        if (!parseCubicBezierTimingFunctionValue(args, x2))
+            return nullptr;
+        if (x2 < 0 || x2 > 1)
+            return nullptr;
+        if (!parseCubicBezierTimingFunctionValue(args, y2))
+            return nullptr;
+
+        return CSSCubicBezierTimingFunctionValue::create(x1, y1, x2, y2);
+    }
+
+    return nullptr;
+}
+
+bool CSSPropertyParser::parseAnimationProperty(CSSPropertyID propId, RefPtrWillBeRawPtr<CSSValue>& result, AnimationParseContext& context)
+{
+    RefPtrWillBeRawPtr<CSSValueList> values;
+    CSSParserValue* val;
+    RefPtrWillBeRawPtr<CSSValue> value;
+    bool allowComma = false;
+
+    result = nullptr;
+
+    while ((val = m_valueList->current())) {
+        RefPtrWillBeRawPtr<CSSValue> currValue;
+        if (allowComma) {
+            if (!isComma(val))
+                return false;
+            m_valueList->next();
+            allowComma = false;
+        }
+        else {
+            switch (propId) {
+                case CSSPropertyAnimationDelay:
+                case CSSPropertyWebkitAnimationDelay:
+                case CSSPropertyTransitionDelay:
+                case CSSPropertyWebkitTransitionDelay:
+                    currValue = parseAnimationDelay();
+                    if (currValue)
+                        m_valueList->next();
+                    break;
+                case CSSPropertyAnimationDirection:
+                case CSSPropertyWebkitAnimationDirection:
+                    currValue = parseAnimationDirection();
+                    if (currValue)
+                        m_valueList->next();
+                    break;
+                case CSSPropertyAnimationDuration:
+                case CSSPropertyWebkitAnimationDuration:
+                case CSSPropertyTransitionDuration:
+                case CSSPropertyWebkitTransitionDuration:
+                    currValue = parseAnimationDuration();
+                    if (currValue)
+                        m_valueList->next();
+                    break;
+                case CSSPropertyAnimationFillMode:
+                case CSSPropertyWebkitAnimationFillMode:
+                    currValue = parseAnimationFillMode();
+                    if (currValue)
+                        m_valueList->next();
+                    break;
+                case CSSPropertyAnimationIterationCount:
+                case CSSPropertyWebkitAnimationIterationCount:
+                    currValue = parseAnimationIterationCount();
+                    if (currValue)
+                        m_valueList->next();
+                    break;
+                case CSSPropertyAnimationName:
+                case CSSPropertyWebkitAnimationName:
+                    currValue = parseAnimationName();
+                    if (currValue)
+                        m_valueList->next();
+                    break;
+                case CSSPropertyAnimationPlayState:
+                case CSSPropertyWebkitAnimationPlayState:
+                    currValue = parseAnimationPlayState();
+                    if (currValue)
+                        m_valueList->next();
+                    break;
+                case CSSPropertyTransitionProperty:
+                case CSSPropertyWebkitTransitionProperty:
+                    currValue = parseAnimationProperty(context);
+                    if (value && !context.animationPropertyKeywordAllowed())
+                        return false;
+                    if (currValue)
+                        m_valueList->next();
+                    break;
+                case CSSPropertyAnimationTimingFunction:
+                case CSSPropertyWebkitAnimationTimingFunction:
+                case CSSPropertyTransitionTimingFunction:
+                case CSSPropertyWebkitTransitionTimingFunction:
+                    currValue = parseAnimationTimingFunction();
+                    if (currValue)
+                        m_valueList->next();
+                    break;
+                default:
+                    ASSERT_NOT_REACHED();
+                    return false;
+            }
+
+            if (!currValue)
+                return false;
+
+            if (value && !values) {
+                values = CSSValueList::createCommaSeparated();
+                values->append(value.release());
+            }
+
+            if (values)
+                values->append(currValue.release());
+            else
+                value = currValue.release();
+
+            allowComma = true;
+        }
+
+        // When parsing the 'transition' shorthand property, we let it handle building up the lists for all
+        // properties.
+        if (inShorthand())
+            break;
+    }
+
+    if (values && values->length()) {
+        result = values.release();
+        return true;
+    }
+    if (value) {
+        result = value.release();
+        return true;
+    }
+    return false;
+}
+
+// The function parses [ <integer> || <string> ] in <grid-line> (which can be stand alone or with 'span').
+bool CSSPropertyParser::parseIntegerOrStringFromGridPosition(RefPtrWillBeRawPtr<CSSPrimitiveValue>& numericValue, RefPtrWillBeRawPtr<CSSPrimitiveValue>& gridLineName)
+{
+    CSSParserValue* value = m_valueList->current();
+    if (validUnit(value, FInteger) && value->fValue) {
+        numericValue = createPrimitiveNumericValue(value);
+        value = m_valueList->next();
+        if (value && value->unit == CSSPrimitiveValue::CSS_STRING) {
+            gridLineName = createPrimitiveStringValue(m_valueList->current());
+            m_valueList->next();
+        }
+        return true;
+    }
+
+    if (value->unit == CSSPrimitiveValue::CSS_STRING) {
+        gridLineName = createPrimitiveStringValue(m_valueList->current());
+        value = m_valueList->next();
+        if (value && validUnit(value, FInteger) && value->fValue) {
+            numericValue = createPrimitiveNumericValue(value);
+            m_valueList->next();
+        }
+        return true;
+    }
+
+    return false;
+}
+
+PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseGridPosition()
+{
+    ASSERT(RuntimeEnabledFeatures::cssGridLayoutEnabled());
+
+    CSSParserValue* value = m_valueList->current();
+    if (value->id == CSSValueAuto) {
+        m_valueList->next();
+        return cssValuePool().createIdentifierValue(CSSValueAuto);
+    }
+
+    if (value->id != CSSValueSpan && value->unit == CSSPrimitiveValue::CSS_IDENT) {
+        m_valueList->next();
+        return cssValuePool().createValue(value->string, CSSPrimitiveValue::CSS_STRING);
+    }
+
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> numericValue;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> gridLineName;
+    bool hasSeenSpanKeyword = false;
+
+    if (parseIntegerOrStringFromGridPosition(numericValue, gridLineName)) {
+        value = m_valueList->current();
+        if (value && value->id == CSSValueSpan) {
+            hasSeenSpanKeyword = true;
+            m_valueList->next();
+        }
+    } else if (value->id == CSSValueSpan) {
+        hasSeenSpanKeyword = true;
+        if (m_valueList->next())
+            parseIntegerOrStringFromGridPosition(numericValue, gridLineName);
+    }
+
+    // Check that we have consumed all the value list. For shorthands, the parser will pass
+    // the whole value list (including the opposite position).
+    if (m_valueList->current() && !isForwardSlashOperator(m_valueList->current()))
+        return nullptr;
+
+    // If we didn't parse anything, this is not a valid grid position.
+    if (!hasSeenSpanKeyword && !gridLineName && !numericValue)
+        return nullptr;
+
+    // Negative numbers are not allowed for span (but are for <integer>).
+    if (hasSeenSpanKeyword && numericValue && numericValue->getIntValue() < 0)
+        return nullptr;
+
+    RefPtrWillBeRawPtr<CSSValueList> values = CSSValueList::createSpaceSeparated();
+    if (hasSeenSpanKeyword)
+        values->append(cssValuePool().createIdentifierValue(CSSValueSpan));
+    if (numericValue)
+        values->append(numericValue.release());
+    if (gridLineName)
+        values->append(gridLineName.release());
+    ASSERT(values->length());
+    return values.release();
+}
+
+static PassRefPtrWillBeRawPtr<CSSValue> gridMissingGridPositionValue(CSSValue* value)
+{
+    if (value->isPrimitiveValue() && toCSSPrimitiveValue(value)->isString())
+        return value;
+
+    return cssValuePool().createIdentifierValue(CSSValueAuto);
+}
+
+bool CSSPropertyParser::parseGridItemPositionShorthand(CSSPropertyID shorthandId, bool important)
+{
+    ShorthandScope scope(this, shorthandId);
+    const StylePropertyShorthand& shorthand = shorthandForProperty(shorthandId);
+    ASSERT(shorthand.length() == 2);
+
+    RefPtrWillBeRawPtr<CSSValue> startValue = parseGridPosition();
+    if (!startValue)
+        return false;
+
+    RefPtrWillBeRawPtr<CSSValue> endValue;
+    if (m_valueList->current()) {
+        if (!isForwardSlashOperator(m_valueList->current()))
+            return false;
+
+        if (!m_valueList->next())
+            return false;
+
+        endValue = parseGridPosition();
+        if (!endValue || m_valueList->current())
+            return false;
+    } else {
+        endValue = gridMissingGridPositionValue(startValue.get());
+    }
+
+    addProperty(shorthand.properties()[0], startValue, important);
+    addProperty(shorthand.properties()[1], endValue, important);
+    return true;
+}
+
+bool CSSPropertyParser::parseGridAreaShorthand(bool important)
+{
+    ASSERT(RuntimeEnabledFeatures::cssGridLayoutEnabled());
+
+    ShorthandScope scope(this, CSSPropertyGridArea);
+    const StylePropertyShorthand& shorthand = gridAreaShorthand();
+    ASSERT_UNUSED(shorthand, shorthand.length() == 4);
+
+    RefPtrWillBeRawPtr<CSSValue> rowStartValue = parseGridPosition();
+    if (!rowStartValue)
+        return false;
+
+    RefPtrWillBeRawPtr<CSSValue> columnStartValue;
+    if (!parseSingleGridAreaLonghand(columnStartValue))
+        return false;
+
+    RefPtrWillBeRawPtr<CSSValue> rowEndValue;
+    if (!parseSingleGridAreaLonghand(rowEndValue))
+        return false;
+
+    RefPtrWillBeRawPtr<CSSValue> columnEndValue;
+    if (!parseSingleGridAreaLonghand(columnEndValue))
+        return false;
+
+    if (!columnStartValue)
+        columnStartValue = gridMissingGridPositionValue(rowStartValue.get());
+
+    if (!rowEndValue)
+        rowEndValue = gridMissingGridPositionValue(rowStartValue.get());
+
+    if (!columnEndValue)
+        columnEndValue = gridMissingGridPositionValue(columnStartValue.get());
+
+    addProperty(CSSPropertyGridRowStart, rowStartValue, important);
+    addProperty(CSSPropertyGridColumnStart, columnStartValue, important);
+    addProperty(CSSPropertyGridRowEnd, rowEndValue, important);
+    addProperty(CSSPropertyGridColumnEnd, columnEndValue, important);
+    return true;
+}
+
+bool CSSPropertyParser::parseSingleGridAreaLonghand(RefPtrWillBeRawPtr<CSSValue>& property)
+{
+    if (!m_valueList->current())
+        return true;
+
+    if (!isForwardSlashOperator(m_valueList->current()))
+        return false;
+
+    if (!m_valueList->next())
+        return false;
+
+    property = parseGridPosition();
+    return true;
+}
+
+void CSSPropertyParser::parseGridLineNames(CSSParserValueList* parserValueList, CSSValueList& valueList)
+{
+    ASSERT(parserValueList->current() && parserValueList->current()->unit == CSSParserValue::ValueList);
+
+    CSSParserValueList* identList = parserValueList->current()->valueList;
+    if (!identList->size()) {
+        parserValueList->next();
+        return;
+    }
+
+    RefPtrWillBeRawPtr<CSSGridLineNamesValue> lineNames = CSSGridLineNamesValue::create();
+    while (CSSParserValue* identValue = identList->current()) {
+        ASSERT(identValue->unit == CSSPrimitiveValue::CSS_IDENT);
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> lineName = createPrimitiveStringValue(identValue);
+        lineNames->append(lineName.release());
+        identList->next();
+    }
+    valueList.append(lineNames.release());
+
+    parserValueList->next();
+}
+
+bool CSSPropertyParser::parseGridTrackList(CSSPropertyID propId, bool important)
+{
+    ASSERT(RuntimeEnabledFeatures::cssGridLayoutEnabled());
+
+    CSSParserValue* value = m_valueList->current();
+    if (value->id == CSSValueNone) {
+        if (m_valueList->next())
+            return false;
+
+        addProperty(propId, cssValuePool().createIdentifierValue(value->id), important);
+        return true;
+    }
+
+    RefPtrWillBeRawPtr<CSSValueList> values = CSSValueList::createSpaceSeparated();
+    // Handle leading  <ident>*.
+    value = m_valueList->current();
+    if (value && value->unit == CSSParserValue::ValueList)
+        parseGridLineNames(m_valueList.get(), *values);
+
+    bool seenTrackSizeOrRepeatFunction = false;
+    while (CSSParserValue* currentValue = m_valueList->current()) {
+        if (currentValue->unit == CSSParserValue::Function && equalIgnoringCase(currentValue->function->name, "repeat(")) {
+            if (!parseGridTrackRepeatFunction(*values))
+                return false;
+            seenTrackSizeOrRepeatFunction = true;
+        } else {
+            RefPtrWillBeRawPtr<CSSValue> value = parseGridTrackSize(*m_valueList);
+            if (!value)
+                return false;
+            values->append(value);
+            seenTrackSizeOrRepeatFunction = true;
+        }
+        // This will handle the trailing <ident>* in the grammar.
+        value = m_valueList->current();
+        if (value && value->unit == CSSParserValue::ValueList)
+            parseGridLineNames(m_valueList.get(), *values);
+    }
+
+    // We should have found a <track-size> or else it is not a valid <track-list>
+    if (!seenTrackSizeOrRepeatFunction)
+        return false;
+
+    addProperty(propId, values.release(), important);
+    return true;
+}
+
+bool CSSPropertyParser::parseGridTrackRepeatFunction(CSSValueList& list)
+{
+    CSSParserValueList* arguments = m_valueList->current()->function->args.get();
+    if (!arguments || arguments->size() < 3 || !validUnit(arguments->valueAt(0), FPositiveInteger) || !isComma(arguments->valueAt(1)))
+        return false;
+
+    ASSERT_WITH_SECURITY_IMPLICATION(arguments->valueAt(0)->fValue > 0);
+    size_t repetitions = arguments->valueAt(0)->fValue;
+    RefPtrWillBeRawPtr<CSSValueList> repeatedValues = CSSValueList::createSpaceSeparated();
+    arguments->next(); // Skip the repetition count.
+    arguments->next(); // Skip the comma.
+
+    // Handle leading <ident>*.
+    CSSParserValue* currentValue = arguments->current();
+    if (currentValue && currentValue->unit == CSSParserValue::ValueList)
+        parseGridLineNames(arguments, *repeatedValues);
+
+    while (arguments->current()) {
+        RefPtrWillBeRawPtr<CSSValue> trackSize = parseGridTrackSize(*arguments);
+        if (!trackSize)
+            return false;
+
+        repeatedValues->append(trackSize);
+
+        // This takes care of any trailing <ident>* in the grammar.
+        currentValue = arguments->current();
+        if (currentValue && currentValue->unit == CSSParserValue::ValueList)
+            parseGridLineNames(arguments, *repeatedValues);
+    }
+
+    for (size_t i = 0; i < repetitions; ++i) {
+        for (size_t j = 0; j < repeatedValues->length(); ++j)
+            list.append(repeatedValues->itemWithoutBoundsCheck(j));
+    }
+
+    // parseGridTrackSize iterated over the repeat arguments, move to the next value.
+    m_valueList->next();
+    return true;
+}
+
+
+PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseGridTrackSize(CSSParserValueList& inputList)
+{
+    ASSERT(RuntimeEnabledFeatures::cssGridLayoutEnabled());
+
+    CSSParserValue* currentValue = inputList.current();
+    inputList.next();
+
+    if (currentValue->id == CSSValueAuto)
+        return cssValuePool().createIdentifierValue(CSSValueAuto);
+
+    if (currentValue->unit == CSSParserValue::Function && equalIgnoringCase(currentValue->function->name, "minmax(")) {
+        // The spec defines the following grammar: minmax( <track-breadth> , <track-breadth> )
+        CSSParserValueList* arguments = currentValue->function->args.get();
+        if (!arguments || arguments->size() != 3 || !isComma(arguments->valueAt(1)))
+            return nullptr;
+
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> minTrackBreadth = parseGridBreadth(arguments->valueAt(0));
+        if (!minTrackBreadth)
+            return nullptr;
+
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> maxTrackBreadth = parseGridBreadth(arguments->valueAt(2));
+        if (!maxTrackBreadth)
+            return nullptr;
+
+        RefPtrWillBeRawPtr<CSSValueList> parsedArguments = CSSValueList::createCommaSeparated();
+        parsedArguments->append(minTrackBreadth);
+        parsedArguments->append(maxTrackBreadth);
+        return CSSFunctionValue::create("minmax(", parsedArguments);
+    }
+
+    return parseGridBreadth(currentValue);
+}
+
+PassRefPtrWillBeRawPtr<CSSPrimitiveValue> CSSPropertyParser::parseGridBreadth(CSSParserValue* currentValue)
+{
+    if (currentValue->id == CSSValueMinContent || currentValue->id == CSSValueMaxContent)
+        return cssValuePool().createIdentifierValue(currentValue->id);
+
+    if (currentValue->unit == CSSPrimitiveValue::CSS_FR) {
+        double flexValue = currentValue->fValue;
+
+        // Fractional unit is a non-negative dimension.
+        if (flexValue <= 0)
+            return nullptr;
+
+        return cssValuePool().createValue(flexValue, CSSPrimitiveValue::CSS_FR);
+    }
+
+    if (!validUnit(currentValue, FNonNeg | FLength | FPercent))
+        return nullptr;
+
+    return createPrimitiveNumericValue(currentValue);
+}
+
+PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseGridTemplateAreas()
+{
+    NamedGridAreaMap gridAreaMap;
+    size_t rowCount = 0;
+    size_t columnCount = 0;
+
+    while (CSSParserValue* currentValue = m_valueList->current()) {
+        if (currentValue->unit != CSSPrimitiveValue::CSS_STRING)
+            return nullptr;
+
+        String gridRowNames = currentValue->string;
+        if (!gridRowNames.length())
+            return nullptr;
+
+        Vector<String> columnNames;
+        gridRowNames.split(' ', columnNames);
+
+        if (!columnCount) {
+            columnCount = columnNames.size();
+            ASSERT(columnCount);
+        } else if (columnCount != columnNames.size()) {
+            // The declaration is invalid is all the rows don't have the number of columns.
+            return nullptr;
+        }
+
+        for (size_t currentCol = 0; currentCol < columnCount; ++currentCol) {
+            const String& gridAreaName = columnNames[currentCol];
+
+            // Unamed areas are always valid (we consider them to be 1x1).
+            if (gridAreaName == ".")
+                continue;
+
+            // We handle several grid areas with the same name at once to simplify the validation code.
+            size_t lookAheadCol;
+            for (lookAheadCol = currentCol; lookAheadCol < (columnCount - 1); ++lookAheadCol) {
+                if (columnNames[lookAheadCol + 1] != gridAreaName)
+                    break;
+            }
+
+            NamedGridAreaMap::iterator gridAreaIt = gridAreaMap.find(gridAreaName);
+            if (gridAreaIt == gridAreaMap.end()) {
+                gridAreaMap.add(gridAreaName, GridCoordinate(GridSpan(rowCount, rowCount), GridSpan(currentCol, lookAheadCol)));
+            } else {
+                GridCoordinate& gridCoordinate = gridAreaIt->value;
+
+                // The following checks test that the grid area is a single filled-in rectangle.
+                // 1. The new row is adjacent to the previously parsed row.
+                if (rowCount != gridCoordinate.rows.initialPositionIndex + 1)
+                    return nullptr;
+
+                // 2. The new area starts at the same position as the previously parsed area.
+                if (currentCol != gridCoordinate.columns.initialPositionIndex)
+                    return nullptr;
+
+                // 3. The new area ends at the same position as the previously parsed area.
+                if (lookAheadCol != gridCoordinate.columns.finalPositionIndex)
+                    return nullptr;
+
+                ++gridCoordinate.rows.finalPositionIndex;
+            }
+            currentCol = lookAheadCol;
+        }
+
+        ++rowCount;
+        m_valueList->next();
+    }
+
+    if (!rowCount || !columnCount)
+        return nullptr;
+
+    return CSSGridTemplateAreasValue::create(gridAreaMap, rowCount, columnCount);
+}
+
+PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseCounterContent(CSSParserValueList* args, bool counters)
+{
+    unsigned numArgs = args->size();
+    if (counters && numArgs != 3 && numArgs != 5)
+        return nullptr;
+    if (!counters && numArgs != 1 && numArgs != 3)
+        return nullptr;
+
+    CSSParserValue* i = args->current();
+    if (i->unit != CSSPrimitiveValue::CSS_IDENT)
+        return nullptr;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> identifier = createPrimitiveStringValue(i);
+
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> separator;
+    if (!counters)
+        separator = cssValuePool().createValue(String(), CSSPrimitiveValue::CSS_STRING);
+    else {
+        i = args->next();
+        if (i->unit != CSSParserValue::Operator || i->iValue != ',')
+            return nullptr;
+
+        i = args->next();
+        if (i->unit != CSSPrimitiveValue::CSS_STRING)
+            return nullptr;
+
+        separator = createPrimitiveStringValue(i);
+    }
+
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> listStyle;
+    i = args->next();
+    if (!i) // Make the list style default decimal
+        listStyle = cssValuePool().createIdentifierValue(CSSValueDecimal);
+    else {
+        if (i->unit != CSSParserValue::Operator || i->iValue != ',')
+            return nullptr;
+
+        i = args->next();
+        if (i->unit != CSSPrimitiveValue::CSS_IDENT)
+            return nullptr;
+
+        CSSValueID listStyleID = CSSValueInvalid;
+        if (i->id == CSSValueNone || (i->id >= CSSValueDisc && i->id <= CSSValueKatakanaIroha))
+            listStyleID = i->id;
+        else
+            return nullptr;
+
+        listStyle = cssValuePool().createIdentifierValue(listStyleID);
+    }
+
+    return cssValuePool().createValue(Counter::create(identifier.release(), listStyle.release(), separator.release()));
+}
+
+bool CSSPropertyParser::parseClipShape(CSSPropertyID propId, bool important)
+{
+    CSSParserValue* value = m_valueList->current();
+    CSSParserValueList* args = value->function->args.get();
+
+    if (!equalIgnoringCase(value->function->name, "rect(") || !args)
+        return false;
+
+    // rect(t, r, b, l) || rect(t r b l)
+    if (args->size() != 4 && args->size() != 7)
+        return false;
+    RefPtrWillBeRawPtr<Rect> rect = Rect::create();
+    bool valid = true;
+    int i = 0;
+    CSSParserValue* a = args->current();
+    while (a) {
+        valid = a->id == CSSValueAuto || validUnit(a, FLength);
+        if (!valid)
+            break;
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> length = a->id == CSSValueAuto ?
+            cssValuePool().createIdentifierValue(CSSValueAuto) :
+            createPrimitiveNumericValue(a);
+        if (i == 0)
+            rect->setTop(length);
+        else if (i == 1)
+            rect->setRight(length);
+        else if (i == 2)
+            rect->setBottom(length);
+        else
+            rect->setLeft(length);
+        a = args->next();
+        if (a && args->size() == 7) {
+            if (a->unit == CSSParserValue::Operator && a->iValue == ',') {
+                a = args->next();
+            } else {
+                valid = false;
+                break;
+            }
+        }
+        i++;
+    }
+    if (valid) {
+        addProperty(propId, cssValuePool().createValue(rect.release()), important);
+        m_valueList->next();
+        return true;
+    }
+    return false;
+}
+
+static void completeBorderRadii(RefPtrWillBeRawPtr<CSSPrimitiveValue> radii[4])
+{
+    if (radii[3])
+        return;
+    if (!radii[2]) {
+        if (!radii[1])
+            radii[1] = radii[0];
+        radii[2] = radii[0];
+    }
+    radii[3] = radii[1];
+}
+
+// FIXME: This should be refactored with CSSParser::parseBorderRadius.
+// CSSParser::parseBorderRadius contains support for some legacy radius construction.
+PassRefPtrWillBeRawPtr<CSSBasicShape> CSSPropertyParser::parseInsetRoundedCorners(PassRefPtrWillBeRawPtr<CSSBasicShapeInset> shape, CSSParserValueList* args)
+{
+    CSSParserValue* argument = args->next();
+
+    if (!argument)
+        return nullptr;
+
+    CSSParserValueList radiusArguments;
+    while (argument) {
+        radiusArguments.addValue(*argument);
+        argument = args->next();
+    }
+
+    unsigned num = radiusArguments.size();
+    if (!num || num > 9)
+        return nullptr;
+
+    // FIXME: Refactor completeBorderRadii and the array
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> radii[2][4];
+
+    unsigned indexAfterSlash = 0;
+    for (unsigned i = 0; i < num; ++i) {
+        CSSParserValue* value = radiusArguments.valueAt(i);
+        if (value->unit == CSSParserValue::Operator) {
+            if (value->iValue != '/')
+                return nullptr;
+
+            if (!i || indexAfterSlash || i + 1 == num)
+                return nullptr;
+
+            indexAfterSlash = i + 1;
+            completeBorderRadii(radii[0]);
+            continue;
+        }
+
+        if (i - indexAfterSlash >= 4)
+            return nullptr;
+
+        if (!validUnit(value, FLength | FPercent | FNonNeg))
+            return nullptr;
+
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> radius = createPrimitiveNumericValue(value);
+
+        if (!indexAfterSlash)
+            radii[0][i] = radius;
+        else
+            radii[1][i - indexAfterSlash] = radius.release();
+    }
+
+    if (!indexAfterSlash) {
+        completeBorderRadii(radii[0]);
+        for (unsigned i = 0; i < 4; ++i)
+            radii[1][i] = radii[0][i];
+    } else {
+        completeBorderRadii(radii[1]);
+    }
+    shape->setTopLeftRadius(createPrimitiveValuePair(radii[0][0].release(), radii[1][0].release()));
+    shape->setTopRightRadius(createPrimitiveValuePair(radii[0][1].release(), radii[1][1].release()));
+    shape->setBottomRightRadius(createPrimitiveValuePair(radii[0][2].release(), radii[1][2].release()));
+    shape->setBottomLeftRadius(createPrimitiveValuePair(radii[0][3].release(), radii[1][3].release()));
+
+    return shape;
+}
+
+PassRefPtrWillBeRawPtr<CSSBasicShape> CSSPropertyParser::parseBasicShapeInset(CSSParserValueList* args)
+{
+    ASSERT(args);
+
+    RefPtrWillBeRawPtr<CSSBasicShapeInset> shape = CSSBasicShapeInset::create();
+
+    CSSParserValue* argument = args->current();
+    WillBeHeapVector<RefPtrWillBeMember<CSSPrimitiveValue> > widthArguments;
+    bool hasRoundedInset = false;
+
+    while (argument) {
+        if (argument->unit == CSSPrimitiveValue::CSS_IDENT && equalIgnoringCase(argument->string, "round")) {
+            hasRoundedInset = true;
+            break;
+        }
+
+        Units unitFlags = FLength | FPercent;
+        if (!validUnit(argument, unitFlags) || widthArguments.size() > 4)
+            return nullptr;
+
+        widthArguments.append(createPrimitiveNumericValue(argument));
+        argument = args->next();
+    }
+
+    switch (widthArguments.size()) {
+    case 1: {
+        shape->updateShapeSize1Value(widthArguments[0].get());
+        break;
+    }
+    case 2: {
+        shape->updateShapeSize2Values(widthArguments[0].get(), widthArguments[1].get());
+        break;
+        }
+    case 3: {
+        shape->updateShapeSize3Values(widthArguments[0].get(), widthArguments[1].get(), widthArguments[2].get());
+        break;
+    }
+    case 4: {
+        shape->updateShapeSize4Values(widthArguments[0].get(), widthArguments[1].get(), widthArguments[2].get(), widthArguments[3].get());
+        break;
+    }
+    default:
+        return nullptr;
+    }
+
+    if (hasRoundedInset)
+        return parseInsetRoundedCorners(shape, args);
+    return shape;
+}
+
+static bool isItemPositionKeyword(CSSValueID id)
+{
+    return id == CSSValueStart || id == CSSValueEnd || id == CSSValueCenter
+        || id == CSSValueSelfStart || id == CSSValueSelfEnd || id == CSSValueFlexStart
+        || id == CSSValueFlexEnd || id == CSSValueLeft || id == CSSValueRight;
+}
+
+bool CSSPropertyParser::parseItemPositionOverflowPosition(CSSPropertyID propId, bool important)
+{
+    // auto | baseline | stretch | [<item-position> && <overflow-position>? ]
+    // <item-position> = center | start | end | self-start | self-end | flex-start | flex-end | left | right;
+    // <overflow-position> = true | safe
+
+    CSSParserValue* value = m_valueList->current();
+
+    if (value->id == CSSValueAuto || value->id == CSSValueBaseline || value->id == CSSValueStretch) {
+        if (m_valueList->next())
+            return false;
+
+        addProperty(propId, cssValuePool().createIdentifierValue(value->id), important);
+        return true;
+    }
+
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> position = nullptr;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> overflowAlignmentKeyword = nullptr;
+    if (isItemPositionKeyword(value->id)) {
+        position = cssValuePool().createIdentifierValue(value->id);
+        value = m_valueList->next();
+        if (value) {
+            if (value->id == CSSValueTrue || value->id == CSSValueSafe)
+                overflowAlignmentKeyword = cssValuePool().createIdentifierValue(value->id);
+            else
+                return false;
+        }
+    } else if (value->id == CSSValueTrue || value->id == CSSValueSafe) {
+        overflowAlignmentKeyword = cssValuePool().createIdentifierValue(value->id);
+        value = m_valueList->next();
+        if (value) {
+            if (isItemPositionKeyword(value->id))
+                position = cssValuePool().createIdentifierValue(value->id);
+            else
+                return false;
+        }
+    } else {
+        return false;
+    }
+
+    if (m_valueList->next())
+        return false;
+
+    ASSERT(position);
+    if (overflowAlignmentKeyword)
+        addProperty(propId, createPrimitiveValuePair(position, overflowAlignmentKeyword), important);
+    else
+        addProperty(propId, position.release(), important);
+
+    return true;
+}
+
+PassRefPtrWillBeRawPtr<CSSBasicShape> CSSPropertyParser::parseBasicShapeRectangle(CSSParserValueList* args)
+{
+    ASSERT(args);
+
+    // rect(x, y, width, height, [[rx], ry])
+    if (args->size() != 7 && args->size() != 9 && args->size() != 11)
+        return nullptr;
+
+    RefPtrWillBeRawPtr<CSSBasicShapeRectangle> shape = CSSBasicShapeRectangle::create();
+
+    unsigned argumentNumber = 0;
+    CSSParserValue* argument = args->current();
+    while (argument) {
+        Units unitFlags = FLength | FPercent;
+        if (argumentNumber > 1) {
+            // Arguments width, height, rx, and ry cannot be negative.
+            unitFlags = unitFlags | FNonNeg;
+        }
+        if (!validUnit(argument, unitFlags))
+            return nullptr;
+
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> length = createPrimitiveNumericValue(argument);
+        ASSERT(argumentNumber < 6);
+        switch (argumentNumber) {
+        case 0:
+            shape->setX(length);
+            break;
+        case 1:
+            shape->setY(length);
+            break;
+        case 2:
+            shape->setWidth(length);
+            break;
+        case 3:
+            shape->setHeight(length);
+            break;
+        case 4:
+            shape->setRadiusX(length);
+            break;
+        case 5:
+            shape->setRadiusY(length);
+            break;
+        }
+        argument = args->next();
+        if (argument) {
+            if (!isComma(argument))
+                return nullptr;
+
+            argument = args->next();
+        }
+        argumentNumber++;
+    }
+
+    if (argumentNumber < 4)
+        return nullptr;
+    return shape;
+}
+
+PassRefPtrWillBeRawPtr<CSSBasicShape> CSSPropertyParser::parseBasicShapeInsetRectangle(CSSParserValueList* args)
+{
+    ASSERT(args);
+
+    // inset-rectangle(top, right, bottom, left, [[rx], ry])
+    if (args->size() != 7 && args->size() != 9 && args->size() != 11)
+        return nullptr;
+
+    RefPtrWillBeRawPtr<CSSBasicShapeInsetRectangle> shape = CSSBasicShapeInsetRectangle::create();
+
+    unsigned argumentNumber = 0;
+    CSSParserValue* argument = args->current();
+    while (argument) {
+        Units unitFlags = FLength | FPercent | FNonNeg;
+        if (!validUnit(argument, unitFlags))
+            return nullptr;
+
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> length = createPrimitiveNumericValue(argument);
+        ASSERT(argumentNumber < 6);
+        switch (argumentNumber) {
+        case 0:
+            shape->setTop(length);
+            break;
+        case 1:
+            shape->setRight(length);
+            break;
+        case 2:
+            shape->setBottom(length);
+            break;
+        case 3:
+            shape->setLeft(length);
+            break;
+        case 4:
+            shape->setRadiusX(length);
+            break;
+        case 5:
+            shape->setRadiusY(length);
+            break;
+        }
+        argument = args->next();
+        if (argument) {
+            if (!isComma(argument))
+                return nullptr;
+
+            argument = args->next();
+        }
+        argumentNumber++;
+    }
+
+    if (argumentNumber < 4)
+        return nullptr;
+    return shape;
+}
+
+PassRefPtrWillBeRawPtr<CSSPrimitiveValue> CSSPropertyParser::parseShapeRadius(CSSParserValue* value)
+{
+    if (value->id == CSSValueClosestSide || value->id == CSSValueFarthestSide)
+        return cssValuePool().createIdentifierValue(value->id);
+
+    if (!validUnit(value, FLength | FPercent | FNonNeg))
+        return nullptr;
+
+    return createPrimitiveNumericValue(value);
+}
+
+PassRefPtrWillBeRawPtr<CSSBasicShape> CSSPropertyParser::parseBasicShapeCircle(CSSParserValueList* args)
+{
+    ASSERT(args);
+
+    // circle(radius)
+    // circle(radius at <position>
+    // circle(at <position>)
+    // where position defines centerX and centerY using a CSS <position> data type.
+    RefPtrWillBeRawPtr<CSSBasicShapeCircle> shape = CSSBasicShapeCircle::create();
+
+    for (CSSParserValue* argument = args->current(); argument; argument = args->next()) {
+        // The call to parseFillPosition below should consume all of the
+        // arguments except the first two. Thus, and index greater than one
+        // indicates an invalid production.
+        if (args->currentIndex() > 1)
+            return nullptr;
+
+        if (!args->currentIndex() && argument->id != CSSValueAt) {
+            if (RefPtrWillBeRawPtr<CSSPrimitiveValue> radius = parseShapeRadius(argument)) {
+                shape->setRadius(radius);
+                continue;
+            }
+
+            return nullptr;
+        }
+
+        if (argument->id == CSSValueAt) {
+            RefPtrWillBeRawPtr<CSSValue> centerX;
+            RefPtrWillBeRawPtr<CSSValue> centerY;
+            args->next(); // set list to start of position center
+            parseFillPosition(args, centerX, centerY);
+            if (centerX && centerY) {
+                ASSERT(centerX->isPrimitiveValue());
+                ASSERT(centerY->isPrimitiveValue());
+                shape->setCenterX(toCSSPrimitiveValue(centerX.get()));
+                shape->setCenterY(toCSSPrimitiveValue(centerY.get()));
+            } else {
+                return nullptr;
+            }
+        } else {
+            return nullptr;
+        }
+    }
+
+    return shape;
+}
+
+PassRefPtrWillBeRawPtr<CSSBasicShape> CSSPropertyParser::parseDeprecatedBasicShapeCircle(CSSParserValueList* args)
+{
+    ASSERT(args);
+
+    // circle(centerX, centerY, radius)
+    if (args->size() != 5)
+        return nullptr;
+
+    RefPtrWillBeRawPtr<CSSDeprecatedBasicShapeCircle> shape = CSSDeprecatedBasicShapeCircle::create();
+
+    unsigned argumentNumber = 0;
+    CSSParserValue* argument = args->current();
+    while (argument) {
+        Units unitFlags = FLength | FPercent;
+        if (argumentNumber == 2) {
+            // Argument radius cannot be negative.
+            unitFlags = unitFlags | FNonNeg;
+        }
+
+        if (!validUnit(argument, unitFlags))
+            return nullptr;
+
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> length = createPrimitiveNumericValue(argument);
+        ASSERT(argumentNumber < 3);
+        switch (argumentNumber) {
+        case 0:
+            shape->setCenterX(length);
+            break;
+        case 1:
+            shape->setCenterY(length);
+            break;
+        case 2:
+            shape->setRadius(length);
+            break;
+        }
+
+        argument = args->next();
+        if (argument) {
+            if (!isComma(argument))
+                return nullptr;
+            argument = args->next();
+        }
+        argumentNumber++;
+    }
+
+    if (argumentNumber < 3)
+        return nullptr;
+    return shape;
+}
+
+PassRefPtrWillBeRawPtr<CSSBasicShape> CSSPropertyParser::parseBasicShapeEllipse(CSSParserValueList* args)
+{
+    ASSERT(args);
+
+    // ellipse(radiusX)
+    // ellipse(radiusX at <position>
+    // ellipse(radiusX radiusY)
+    // ellipse(radiusX radiusY at <position>
+    // ellipse(at <position>)
+    // where position defines centerX and centerY using a CSS <position> data type.
+    RefPtrWillBeRawPtr<CSSBasicShapeEllipse> shape = CSSBasicShapeEllipse::create();
+
+    for (CSSParserValue* argument = args->current(); argument; argument = args->next()) {
+        // The call to parseFillPosition below should consume all of the
+        // arguments except the first three. Thus, an index greater than two
+        // indicates an invalid production.
+        if (args->currentIndex() > 2)
+            return nullptr;
+
+        if (args->currentIndex() < 2 && argument->id != CSSValueAt) {
+            if (RefPtrWillBeRawPtr<CSSPrimitiveValue> radius = parseShapeRadius(argument)) {
+                if (!shape->radiusX())
+                    shape->setRadiusX(radius);
+                else
+                    shape->setRadiusY(radius);
+                continue;
+            }
+
+            return nullptr;
+        }
+
+        if (argument->id != CSSValueAt)
+            return nullptr;
+        RefPtrWillBeRawPtr<CSSValue> centerX;
+        RefPtrWillBeRawPtr<CSSValue> centerY;
+        args->next(); // set list to start of position center
+        parseFillPosition(args, centerX, centerY);
+        if (!centerX || !centerY)
+            return nullptr;
+
+        ASSERT(centerX->isPrimitiveValue());
+        ASSERT(centerY->isPrimitiveValue());
+        shape->setCenterX(toCSSPrimitiveValue(centerX.get()));
+        shape->setCenterY(toCSSPrimitiveValue(centerY.get()));
+    }
+
+    return shape;
+}
+
+PassRefPtrWillBeRawPtr<CSSBasicShape> CSSPropertyParser::parseDeprecatedBasicShapeEllipse(CSSParserValueList* args)
+{
+    ASSERT(args);
+
+    // ellipse(centerX, centerY, radiusX, radiusY)
+    if (args->size() != 7)
+        return nullptr;
+
+    RefPtrWillBeRawPtr<CSSDeprecatedBasicShapeEllipse> shape = CSSDeprecatedBasicShapeEllipse::create();
+    unsigned argumentNumber = 0;
+    CSSParserValue* argument = args->current();
+    while (argument) {
+        Units unitFlags = FLength | FPercent;
+        if (argumentNumber > 1) {
+            // Arguments radiusX and radiusY cannot be negative.
+            unitFlags = unitFlags | FNonNeg;
+        }
+        if (!validUnit(argument, unitFlags))
+            return nullptr;
+
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> length = createPrimitiveNumericValue(argument);
+        ASSERT(argumentNumber < 4);
+        switch (argumentNumber) {
+        case 0:
+            shape->setCenterX(length);
+            break;
+        case 1:
+            shape->setCenterY(length);
+            break;
+        case 2:
+            shape->setRadiusX(length);
+            break;
+        case 3:
+            shape->setRadiusY(length);
+            break;
+        }
+
+        argument = args->next();
+        if (argument) {
+            if (!isComma(argument))
+                return nullptr;
+            argument = args->next();
+        }
+        argumentNumber++;
+    }
+
+    if (argumentNumber < 4)
+        return nullptr;
+    return shape;
+}
+
+PassRefPtrWillBeRawPtr<CSSBasicShape> CSSPropertyParser::parseBasicShapePolygon(CSSParserValueList* args)
+{
+    ASSERT(args);
+
+    unsigned size = args->size();
+    if (!size)
+        return nullptr;
+
+    RefPtrWillBeRawPtr<CSSBasicShapePolygon> shape = CSSBasicShapePolygon::create();
+
+    CSSParserValue* argument = args->current();
+    if (argument->id == CSSValueEvenodd || argument->id == CSSValueNonzero) {
+        shape->setWindRule(argument->id == CSSValueEvenodd ? RULE_EVENODD : RULE_NONZERO);
+
+        if (!isComma(args->next()))
+            return nullptr;
+
+        argument = args->next();
+        size -= 2;
+    }
+
+    // <length> <length>, ... <length> <length> -> each pair has 3 elements except the last one
+    if (!size || (size % 3) - 2)
+        return nullptr;
+
+    CSSParserValue* argumentX = argument;
+    while (argumentX) {
+        if (!validUnit(argumentX, FLength | FPercent))
+            return nullptr;
+
+        CSSParserValue* argumentY = args->next();
+        if (!argumentY || !validUnit(argumentY, FLength | FPercent))
+            return nullptr;
+
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> xLength = createPrimitiveNumericValue(argumentX);
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> yLength = createPrimitiveNumericValue(argumentY);
+
+        shape->appendPoint(xLength.release(), yLength.release());
+
+        CSSParserValue* commaOrNull = args->next();
+        if (!commaOrNull)
+            argumentX = 0;
+        else if (!isComma(commaOrNull))
+            return nullptr;
+        else
+            argumentX = args->next();
+    }
+
+    return shape;
+}
+
+static bool isBoxValue(CSSValueID valueId)
+{
+    switch (valueId) {
+    case CSSValueContentBox:
+    case CSSValuePaddingBox:
+    case CSSValueBorderBox:
+    case CSSValueMarginBox:
+        return true;
+    default:
+        break;
+    }
+
+    return false;
+}
+
+// FIXME This function is temporary to allow for an orderly transition between
+// the new CSS Shapes circle and ellipse syntax. It will be removed when the
+// old syntax is removed.
+static bool isDeprecatedBasicShape(CSSParserValueList* args)
+{
+    for (unsigned i = args->currentIndex(); i < args->size(); ++i) {
+        CSSParserValue* value = args->valueAt(i);
+        if (isComma(value))
+            return true;
+    }
+
+    return false;
+}
+
+PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseShapeProperty(CSSPropertyID propId)
+{
+    if (!RuntimeEnabledFeatures::cssShapesEnabled())
+        return nullptr;
+
+    CSSParserValue* value = m_valueList->current();
+    CSSValueID valueId = value->id;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> boxValue;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> shapeValue;
+
+    if (valueId == CSSValueNone
+        || (valueId == CSSValueOutsideShape && propId == CSSPropertyShapeInside)) {
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> keywordValue = parseValidPrimitive(valueId, value);
+        m_valueList->next();
+        return keywordValue.release();
+    }
+
+    RefPtrWillBeRawPtr<CSSValue> imageValue;
+    if (valueId != CSSValueNone && parseFillImage(m_valueList.get(), imageValue)) {
+        m_valueList->next();
+        return imageValue.release();
+    }
+
+    if (value->unit == CSSParserValue::Function) {
+        shapeValue = parseBasicShape();
+        if (!shapeValue)
+            return nullptr;
+    } else if (isBoxValue(valueId)) {
+        boxValue = parseValidPrimitive(valueId, value);
+        m_valueList->next();
+    } else {
+        return nullptr;
+    }
+
+    ASSERT(shapeValue || boxValue);
+    value = m_valueList->current();
+
+    if (value) {
+        valueId = value->id;
+        if (boxValue && value->unit == CSSParserValue::Function) {
+            shapeValue = parseBasicShape();
+            if (!shapeValue)
+                return nullptr;
+        } else if (shapeValue && isBoxValue(valueId)) {
+            boxValue = parseValidPrimitive(valueId, value);
+            m_valueList->next();
+        } else {
+            return nullptr;
+        }
+
+        ASSERT(shapeValue && boxValue);
+        shapeValue->getShapeValue()->setLayoutBox(boxValue.release());
+    }
+
+    if (shapeValue)
+        return shapeValue.release();
+    return boxValue.release();
+}
+
+PassRefPtrWillBeRawPtr<CSSPrimitiveValue> CSSPropertyParser::parseBasicShape()
+{
+    CSSParserValue* value = m_valueList->current();
+    ASSERT(value->unit == CSSParserValue::Function);
+    CSSParserValueList* args = value->function->args.get();
+
+    if (!args)
+        return nullptr;
+
+    RefPtrWillBeRawPtr<CSSBasicShape> shape;
+    if (equalIgnoringCase(value->function->name, "rectangle("))
+        shape = parseBasicShapeRectangle(args);
+    else if (equalIgnoringCase(value->function->name, "circle("))
+        if (isDeprecatedBasicShape(args))
+            shape = parseDeprecatedBasicShapeCircle(args);
+        else
+            shape = parseBasicShapeCircle(args);
+    else if (equalIgnoringCase(value->function->name, "ellipse("))
+        if (isDeprecatedBasicShape(args))
+            shape = parseDeprecatedBasicShapeEllipse(args);
+        else
+            shape = parseBasicShapeEllipse(args);
+    else if (equalIgnoringCase(value->function->name, "polygon("))
+        shape = parseBasicShapePolygon(args);
+    else if (equalIgnoringCase(value->function->name, "inset-rectangle("))
+        shape = parseBasicShapeInsetRectangle(args);
+    else if (equalIgnoringCase(value->function->name, "inset("))
+        shape = parseBasicShapeInset(args);
+
+    if (!shape)
+        return nullptr;
+
+    m_valueList->next();
+    return cssValuePool().createValue(shape.release());
+}
+
+// [ 'font-style' || 'font-variant' || 'font-weight' ]? 'font-size' [ / 'line-height' ]? 'font-family'
+bool CSSPropertyParser::parseFont(bool important)
+{
+    // Let's check if there is an inherit or initial somewhere in the shorthand.
+    for (unsigned i = 0; i < m_valueList->size(); ++i) {
+        if (m_valueList->valueAt(i)->id == CSSValueInherit || m_valueList->valueAt(i)->id == CSSValueInitial)
+            return false;
+    }
+
+    ShorthandScope scope(this, CSSPropertyFont);
+    // Optional font-style, font-variant and font-weight.
+    bool fontStyleParsed = false;
+    bool fontVariantParsed = false;
+    bool fontWeightParsed = false;
+    CSSParserValue* value;
+    while ((value = m_valueList->current())) {
+        if (!fontStyleParsed && isValidKeywordPropertyAndValue(CSSPropertyFontStyle, value->id, m_context)) {
+            addProperty(CSSPropertyFontStyle, cssValuePool().createIdentifierValue(value->id), important);
+            fontStyleParsed = true;
+        } else if (!fontVariantParsed && (value->id == CSSValueNormal || value->id == CSSValueSmallCaps)) {
+            // Font variant in the shorthand is particular, it only accepts normal or small-caps.
+            addProperty(CSSPropertyFontVariant, cssValuePool().createIdentifierValue(value->id), important);
+            fontVariantParsed = true;
+        } else if (!fontWeightParsed && parseFontWeight(important))
+            fontWeightParsed = true;
+        else
+            break;
+        m_valueList->next();
+    }
+
+    if (!value)
+        return false;
+
+    if (!fontStyleParsed)
+        addProperty(CSSPropertyFontStyle, cssValuePool().createIdentifierValue(CSSValueNormal), important, true);
+    if (!fontVariantParsed)
+        addProperty(CSSPropertyFontVariant, cssValuePool().createIdentifierValue(CSSValueNormal), important, true);
+    if (!fontWeightParsed)
+        addProperty(CSSPropertyFontWeight, cssValuePool().createIdentifierValue(CSSValueNormal), important, true);
+
+    // Now a font size _must_ come.
+    // <absolute-size> | <relative-size> | <length> | <percentage> | inherit
+    if (!parseFontSize(important))
+        return false;
+
+    value = m_valueList->current();
+    if (!value)
+        return false;
+
+    if (isForwardSlashOperator(value)) {
+        // The line-height property.
+        value = m_valueList->next();
+        if (!value)
+            return false;
+        if (!parseLineHeight(important))
+            return false;
+    } else
+        addProperty(CSSPropertyLineHeight, cssValuePool().createIdentifierValue(CSSValueNormal), important, true);
+
+    // Font family must come now.
+    RefPtrWillBeRawPtr<CSSValue> parsedFamilyValue = parseFontFamily();
+    if (!parsedFamilyValue)
+        return false;
+
+    addProperty(CSSPropertyFontFamily, parsedFamilyValue.release(), important);
+
+    // FIXME: http://www.w3.org/TR/2011/WD-css3-fonts-20110324/#font-prop requires that
+    // "font-stretch", "font-size-adjust", and "font-kerning" be reset to their initial values
+    // but we don't seem to support them at the moment. They should also be added here once implemented.
+    if (m_valueList->current())
+        return false;
+
+    return true;
+}
+
+class FontFamilyValueBuilder {
+    DISALLOW_ALLOCATION();
+public:
+    FontFamilyValueBuilder(CSSValueList* list)
+        : m_list(list)
+    {
+    }
+
+    void add(const CSSParserString& string)
+    {
+        if (!m_builder.isEmpty())
+            m_builder.append(' ');
+
+        if (string.is8Bit()) {
+            m_builder.append(string.characters8(), string.length());
+            return;
+        }
+
+        m_builder.append(string.characters16(), string.length());
+    }
+
+    void commit()
+    {
+        if (m_builder.isEmpty())
+            return;
+        m_list->append(cssValuePool().createFontFamilyValue(m_builder.toString()));
+        m_builder.clear();
+    }
+
+private:
+    StringBuilder m_builder;
+    CSSValueList* m_list;
+};
+
+PassRefPtrWillBeRawPtr<CSSValueList> CSSPropertyParser::parseFontFamily()
+{
+    RefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createCommaSeparated();
+    CSSParserValue* value = m_valueList->current();
+
+    FontFamilyValueBuilder familyBuilder(list.get());
+    bool inFamily = false;
+
+    while (value) {
+        CSSParserValue* nextValue = m_valueList->next();
+        bool nextValBreaksFont = !nextValue ||
+                                 (nextValue->unit == CSSParserValue::Operator && nextValue->iValue == ',');
+        bool nextValIsFontName = nextValue &&
+            ((nextValue->id >= CSSValueSerif && nextValue->id <= CSSValueWebkitBody) ||
+            (nextValue->unit == CSSPrimitiveValue::CSS_STRING || nextValue->unit == CSSPrimitiveValue::CSS_IDENT));
+
+        bool valueIsKeyword = value->id == CSSValueInitial || value->id == CSSValueInherit || value->id == CSSValueDefault;
+        if (valueIsKeyword && !inFamily) {
+            if (nextValBreaksFont)
+                value = m_valueList->next();
+            else if (nextValIsFontName)
+                value = nextValue;
+            continue;
+        }
+
+        if (value->id >= CSSValueSerif && value->id <= CSSValueWebkitBody) {
+            if (inFamily)
+                familyBuilder.add(value->string);
+            else if (nextValBreaksFont || !nextValIsFontName)
+                list->append(cssValuePool().createIdentifierValue(value->id));
+            else {
+                familyBuilder.commit();
+                familyBuilder.add(value->string);
+                inFamily = true;
+            }
+        } else if (value->unit == CSSPrimitiveValue::CSS_STRING) {
+            // Strings never share in a family name.
+            inFamily = false;
+            familyBuilder.commit();
+            list->append(cssValuePool().createFontFamilyValue(value->string));
+        } else if (value->unit == CSSPrimitiveValue::CSS_IDENT) {
+            if (inFamily)
+                familyBuilder.add(value->string);
+            else if (nextValBreaksFont || !nextValIsFontName)
+                list->append(cssValuePool().createFontFamilyValue(value->string));
+            else {
+                familyBuilder.commit();
+                familyBuilder.add(value->string);
+                inFamily = true;
+            }
+        } else {
+            break;
+        }
+
+        if (!nextValue)
+            break;
+
+        if (nextValBreaksFont) {
+            value = m_valueList->next();
+            familyBuilder.commit();
+            inFamily = false;
+        }
+        else if (nextValIsFontName)
+            value = nextValue;
+        else
+            break;
+    }
+    familyBuilder.commit();
+
+    if (!list->length())
+        list = nullptr;
+    return list.release();
+}
+
+bool CSSPropertyParser::parseLineHeight(bool important)
+{
+    CSSParserValue* value = m_valueList->current();
+    CSSValueID id = value->id;
+    bool validPrimitive = false;
+    // normal | <number> | <length> | <percentage> | inherit
+    if (id == CSSValueNormal)
+        validPrimitive = true;
+    else
+        validPrimitive = (!id && validUnit(value, FNumber | FLength | FPercent | FNonNeg));
+    if (validPrimitive && (!m_valueList->next() || inShorthand()))
+        addProperty(CSSPropertyLineHeight, parseValidPrimitive(id, value), important);
+    return validPrimitive;
+}
+
+bool CSSPropertyParser::parseFontSize(bool important)
+{
+    CSSParserValue* value = m_valueList->current();
+    CSSValueID id = value->id;
+    bool validPrimitive = false;
+    // <absolute-size> | <relative-size> | <length> | <percentage> | inherit
+    if (id >= CSSValueXxSmall && id <= CSSValueLarger)
+        validPrimitive = true;
+    else
+        validPrimitive = validUnit(value, FLength | FPercent | FNonNeg);
+    if (validPrimitive && (!m_valueList->next() || inShorthand()))
+        addProperty(CSSPropertyFontSize, parseValidPrimitive(id, value), important);
+    return validPrimitive;
+}
+
+bool CSSPropertyParser::parseFontVariant(bool important)
+{
+    RefPtrWillBeRawPtr<CSSValueList> values;
+    if (m_valueList->size() > 1)
+        values = CSSValueList::createCommaSeparated();
+    CSSParserValue* val;
+    bool expectComma = false;
+    while ((val = m_valueList->current())) {
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> parsedValue;
+        if (!expectComma) {
+            expectComma = true;
+            if (val->id == CSSValueNormal || val->id == CSSValueSmallCaps)
+                parsedValue = cssValuePool().createIdentifierValue(val->id);
+            else if (val->id == CSSValueAll && !values) {
+                // 'all' is only allowed in @font-face and with no other values. Make a value list to
+                // indicate that we are in the @font-face case.
+                values = CSSValueList::createCommaSeparated();
+                parsedValue = cssValuePool().createIdentifierValue(val->id);
+            }
+        } else if (val->unit == CSSParserValue::Operator && val->iValue == ',') {
+            expectComma = false;
+            m_valueList->next();
+            continue;
+        }
+
+        if (!parsedValue)
+            return false;
+
+        m_valueList->next();
+
+        if (values)
+            values->append(parsedValue.release());
+        else {
+            addProperty(CSSPropertyFontVariant, parsedValue.release(), important);
+            return true;
+        }
+    }
+
+    if (values && values->length()) {
+        m_hasFontFaceOnlyValues = true;
+        addProperty(CSSPropertyFontVariant, values.release(), important);
+        return true;
+    }
+
+    return false;
+}
+
+bool CSSPropertyParser::parseFontWeight(bool important)
+{
+    CSSParserValue* value = m_valueList->current();
+    if ((value->id >= CSSValueNormal) && (value->id <= CSSValue900)) {
+        addProperty(CSSPropertyFontWeight, cssValuePool().createIdentifierValue(value->id), important);
+        return true;
+    }
+    if (validUnit(value, FInteger | FNonNeg, HTMLQuirksMode)) {
+        int weight = static_cast<int>(value->fValue);
+        if (!(weight % 100) && weight >= 100 && weight <= 900) {
+            addProperty(CSSPropertyFontWeight, cssValuePool().createIdentifierValue(static_cast<CSSValueID>(CSSValue100 + weight / 100 - 1)), important);
+            return true;
+        }
+    }
+    return false;
+}
+
+bool CSSPropertyParser::parseFontFaceSrcURI(CSSValueList* valueList)
+{
+    RefPtrWillBeRawPtr<CSSFontFaceSrcValue> uriValue(CSSFontFaceSrcValue::create(completeURL(m_valueList->current()->string)));
+
+    CSSParserValue* value = m_valueList->next();
+    if (!value) {
+        valueList->append(uriValue.release());
+        return true;
+    }
+    if (value->unit == CSSParserValue::Operator && value->iValue == ',') {
+        m_valueList->next();
+        valueList->append(uriValue.release());
+        return true;
+    }
+
+    if (value->unit != CSSParserValue::Function || !equalIgnoringCase(value->function->name, "format("))
+        return false;
+
+    // FIXME: http://www.w3.org/TR/2011/WD-css3-fonts-20111004/ says that format() contains a comma-separated list of strings,
+    // but CSSFontFaceSrcValue stores only one format. Allowing one format for now.
+    CSSParserValueList* args = value->function->args.get();
+    if (!args || args->size() != 1 || (args->current()->unit != CSSPrimitiveValue::CSS_STRING && args->current()->unit != CSSPrimitiveValue::CSS_IDENT))
+        return false;
+    uriValue->setFormat(args->current()->string);
+    valueList->append(uriValue.release());
+    value = m_valueList->next();
+    if (value && value->unit == CSSParserValue::Operator && value->iValue == ',')
+        m_valueList->next();
+    return true;
+}
+
+bool CSSPropertyParser::parseFontFaceSrcLocal(CSSValueList* valueList)
+{
+    CSSParserValueList* args = m_valueList->current()->function->args.get();
+    if (!args || !args->size())
+        return false;
+
+    if (args->size() == 1 && args->current()->unit == CSSPrimitiveValue::CSS_STRING)
+        valueList->append(CSSFontFaceSrcValue::createLocal(args->current()->string));
+    else if (args->current()->unit == CSSPrimitiveValue::CSS_IDENT) {
+        StringBuilder builder;
+        for (CSSParserValue* localValue = args->current(); localValue; localValue = args->next()) {
+            if (localValue->unit != CSSPrimitiveValue::CSS_IDENT)
+                return false;
+            if (!builder.isEmpty())
+                builder.append(' ');
+            builder.append(localValue->string);
+        }
+        valueList->append(CSSFontFaceSrcValue::createLocal(builder.toString()));
+    } else
+        return false;
+
+    if (CSSParserValue* value = m_valueList->next()) {
+        if (value->unit == CSSParserValue::Operator && value->iValue == ',')
+            m_valueList->next();
+    }
+    return true;
+}
+
+bool CSSPropertyParser::parseFontFaceSrc()
+{
+    RefPtrWillBeRawPtr<CSSValueList> values(CSSValueList::createCommaSeparated());
+
+    while (CSSParserValue* value = m_valueList->current()) {
+        if (value->unit == CSSPrimitiveValue::CSS_URI) {
+            if (!parseFontFaceSrcURI(values.get()))
+                return false;
+        } else if (value->unit == CSSParserValue::Function && equalIgnoringCase(value->function->name, "local(")) {
+            if (!parseFontFaceSrcLocal(values.get()))
+                return false;
+        } else
+            return false;
+    }
+    if (!values->length())
+        return false;
+
+    addProperty(CSSPropertySrc, values.release(), m_important);
+    m_valueList->next();
+    return true;
+}
+
+bool CSSPropertyParser::parseFontFaceUnicodeRange()
+{
+    RefPtrWillBeRawPtr<CSSValueList> values = CSSValueList::createCommaSeparated();
+    bool failed = false;
+    bool operatorExpected = false;
+    for (; m_valueList->current(); m_valueList->next(), operatorExpected = !operatorExpected) {
+        if (operatorExpected) {
+            if (m_valueList->current()->unit == CSSParserValue::Operator && m_valueList->current()->iValue == ',')
+                continue;
+            failed = true;
+            break;
+        }
+        if (m_valueList->current()->unit != CSSPrimitiveValue::CSS_UNICODE_RANGE) {
+            failed = true;
+            break;
+        }
+
+        String rangeString = m_valueList->current()->string;
+        UChar32 from = 0;
+        UChar32 to = 0;
+        unsigned length = rangeString.length();
+
+        if (length < 3) {
+            failed = true;
+            break;
+        }
+
+        unsigned i = 2;
+        while (i < length) {
+            UChar c = rangeString[i];
+            if (c == '-' || c == '?')
+                break;
+            from *= 16;
+            if (c >= '0' && c <= '9')
+                from += c - '0';
+            else if (c >= 'A' && c <= 'F')
+                from += 10 + c - 'A';
+            else if (c >= 'a' && c <= 'f')
+                from += 10 + c - 'a';
+            else {
+                failed = true;
+                break;
+            }
+            i++;
+        }
+        if (failed)
+            break;
+
+        if (i == length)
+            to = from;
+        else if (rangeString[i] == '?') {
+            unsigned span = 1;
+            while (i < length && rangeString[i] == '?') {
+                span *= 16;
+                from *= 16;
+                i++;
+            }
+            if (i < length)
+                failed = true;
+            to = from + span - 1;
+        } else {
+            if (length < i + 2) {
+                failed = true;
+                break;
+            }
+            i++;
+            while (i < length) {
+                UChar c = rangeString[i];
+                to *= 16;
+                if (c >= '0' && c <= '9')
+                    to += c - '0';
+                else if (c >= 'A' && c <= 'F')
+                    to += 10 + c - 'A';
+                else if (c >= 'a' && c <= 'f')
+                    to += 10 + c - 'a';
+                else {
+                    failed = true;
+                    break;
+                }
+                i++;
+            }
+            if (failed)
+                break;
+        }
+        if (from <= to)
+            values->append(CSSUnicodeRangeValue::create(from, to));
+    }
+    if (failed || !values->length())
+        return false;
+    addProperty(CSSPropertyUnicodeRange, values.release(), m_important);
+    return true;
+}
+
+// Returns the number of characters which form a valid double
+// and are terminated by the given terminator character
+template <typename CharacterType>
+static int checkForValidDouble(const CharacterType* string, const CharacterType* end, const char terminator)
+{
+    int length = end - string;
+    if (length < 1)
+        return 0;
+
+    bool decimalMarkSeen = false;
+    int processedLength = 0;
+
+    for (int i = 0; i < length; ++i) {
+        if (string[i] == terminator) {
+            processedLength = i;
+            break;
+        }
+        if (!isASCIIDigit(string[i])) {
+            if (!decimalMarkSeen && string[i] == '.')
+                decimalMarkSeen = true;
+            else
+                return 0;
+        }
+    }
+
+    if (decimalMarkSeen && processedLength == 1)
+        return 0;
+
+    return processedLength;
+}
+
+// Returns the number of characters consumed for parsing a valid double
+// terminated by the given terminator character
+template <typename CharacterType>
+static int parseDouble(const CharacterType* string, const CharacterType* end, const char terminator, double& value)
+{
+    int length = checkForValidDouble(string, end, terminator);
+    if (!length)
+        return 0;
+
+    int position = 0;
+    double localValue = 0;
+
+    // The consumed characters here are guaranteed to be
+    // ASCII digits with or without a decimal mark
+    for (; position < length; ++position) {
+        if (string[position] == '.')
+            break;
+        localValue = localValue * 10 + string[position] - '0';
+    }
+
+    if (++position == length) {
+        value = localValue;
+        return length;
+    }
+
+    double fraction = 0;
+    double scale = 1;
+
+    while (position < length && scale < MAX_SCALE) {
+        fraction = fraction * 10 + string[position++] - '0';
+        scale *= 10;
+    }
+
+    value = localValue + fraction / scale;
+    return length;
+}
+
+template <typename CharacterType>
+static bool parseColorIntOrPercentage(const CharacterType*& string, const CharacterType* end, const char terminator, CSSPrimitiveValue::UnitTypes& expect, int& value)
+{
+    const CharacterType* current = string;
+    double localValue = 0;
+    bool negative = false;
+    while (current != end && isHTMLSpace<CharacterType>(*current))
+        current++;
+    if (current != end && *current == '-') {
+        negative = true;
+        current++;
+    }
+    if (current == end || !isASCIIDigit(*current))
+        return false;
+    while (current != end && isASCIIDigit(*current)) {
+        double newValue = localValue * 10 + *current++ - '0';
+        if (newValue >= 255) {
+            // Clamp values at 255.
+            localValue = 255;
+            while (current != end && isASCIIDigit(*current))
+                ++current;
+            break;
+        }
+        localValue = newValue;
+    }
+
+    if (current == end)
+        return false;
+
+    if (expect == CSSPrimitiveValue::CSS_NUMBER && (*current == '.' || *current == '%'))
+        return false;
+
+    if (*current == '.') {
+        // We already parsed the integral part, try to parse
+        // the fraction part of the percentage value.
+        double percentage = 0;
+        int numCharactersParsed = parseDouble(current, end, '%', percentage);
+        if (!numCharactersParsed)
+            return false;
+        current += numCharactersParsed;
+        if (*current != '%')
+            return false;
+        localValue += percentage;
+    }
+
+    if (expect == CSSPrimitiveValue::CSS_PERCENTAGE && *current != '%')
+        return false;
+
+    if (*current == '%') {
+        expect = CSSPrimitiveValue::CSS_PERCENTAGE;
+        localValue = localValue / 100.0 * 256.0;
+        // Clamp values at 255 for percentages over 100%
+        if (localValue > 255)
+            localValue = 255;
+        current++;
+    } else
+        expect = CSSPrimitiveValue::CSS_NUMBER;
+
+    while (current != end && isHTMLSpace<CharacterType>(*current))
+        current++;
+    if (current == end || *current++ != terminator)
+        return false;
+    // Clamp negative values at zero.
+    value = negative ? 0 : static_cast<int>(localValue);
+    string = current;
+    return true;
+}
+
+template <typename CharacterType>
+static inline bool isTenthAlpha(const CharacterType* string, const int length)
+{
+    // "0.X"
+    if (length == 3 && string[0] == '0' && string[1] == '.' && isASCIIDigit(string[2]))
+        return true;
+
+    // ".X"
+    if (length == 2 && string[0] == '.' && isASCIIDigit(string[1]))
+        return true;
+
+    return false;
+}
+
+template <typename CharacterType>
+static inline bool parseAlphaValue(const CharacterType*& string, const CharacterType* end, const char terminator, int& value)
+{
+    while (string != end && isHTMLSpace<CharacterType>(*string))
+        string++;
+
+    bool negative = false;
+
+    if (string != end && *string == '-') {
+        negative = true;
+        string++;
+    }
+
+    value = 0;
+
+    int length = end - string;
+    if (length < 2)
+        return false;
+
+    if (string[length - 1] != terminator || !isASCIIDigit(string[length - 2]))
+        return false;
+
+    if (string[0] != '0' && string[0] != '1' && string[0] != '.') {
+        if (checkForValidDouble(string, end, terminator)) {
+            value = negative ? 0 : 255;
+            string = end;
+            return true;
+        }
+        return false;
+    }
+
+    if (length == 2 && string[0] != '.') {
+        value = !negative && string[0] == '1' ? 255 : 0;
+        string = end;
+        return true;
+    }
+
+    if (isTenthAlpha(string, length - 1)) {
+        static const int tenthAlphaValues[] = { 0, 25, 51, 76, 102, 127, 153, 179, 204, 230 };
+        value = negative ? 0 : tenthAlphaValues[string[length - 2] - '0'];
+        string = end;
+        return true;
+    }
+
+    double alpha = 0;
+    if (!parseDouble(string, end, terminator, alpha))
+        return false;
+    value = negative ? 0 : static_cast<int>(alpha * nextafter(256.0, 0.0));
+    string = end;
+    return true;
+}
+
+template <typename CharacterType>
+static inline bool mightBeRGBA(const CharacterType* characters, unsigned length)
+{
+    if (length < 5)
+        return false;
+    return characters[4] == '('
+        && isASCIIAlphaCaselessEqual(characters[0], 'r')
+        && isASCIIAlphaCaselessEqual(characters[1], 'g')
+        && isASCIIAlphaCaselessEqual(characters[2], 'b')
+        && isASCIIAlphaCaselessEqual(characters[3], 'a');
+}
+
+template <typename CharacterType>
+static inline bool mightBeRGB(const CharacterType* characters, unsigned length)
+{
+    if (length < 4)
+        return false;
+    return characters[3] == '('
+        && isASCIIAlphaCaselessEqual(characters[0], 'r')
+        && isASCIIAlphaCaselessEqual(characters[1], 'g')
+        && isASCIIAlphaCaselessEqual(characters[2], 'b');
+}
+
+template <typename CharacterType>
+static inline bool fastParseColorInternal(RGBA32& rgb, const CharacterType* characters, unsigned length , bool strict)
+{
+    CSSPrimitiveValue::UnitTypes expect = CSSPrimitiveValue::CSS_UNKNOWN;
+
+    if (!strict && length >= 3) {
+        if (characters[0] == '#') {
+            if (Color::parseHexColor(characters + 1, length - 1, rgb))
+                return true;
+        } else {
+            if (Color::parseHexColor(characters, length, rgb))
+                return true;
+        }
+    }
+
+    // Try rgba() syntax.
+    if (mightBeRGBA(characters, length)) {
+        const CharacterType* current = characters + 5;
+        const CharacterType* end = characters + length;
+        int red;
+        int green;
+        int blue;
+        int alpha;
+
+        if (!parseColorIntOrPercentage(current, end, ',', expect, red))
+            return false;
+        if (!parseColorIntOrPercentage(current, end, ',', expect, green))
+            return false;
+        if (!parseColorIntOrPercentage(current, end, ',', expect, blue))
+            return false;
+        if (!parseAlphaValue(current, end, ')', alpha))
+            return false;
+        if (current != end)
+            return false;
+        rgb = makeRGBA(red, green, blue, alpha);
+        return true;
+    }
+
+    // Try rgb() syntax.
+    if (mightBeRGB(characters, length)) {
+        const CharacterType* current = characters + 4;
+        const CharacterType* end = characters + length;
+        int red;
+        int green;
+        int blue;
+        if (!parseColorIntOrPercentage(current, end, ',', expect, red))
+            return false;
+        if (!parseColorIntOrPercentage(current, end, ',', expect, green))
+            return false;
+        if (!parseColorIntOrPercentage(current, end, ')', expect, blue))
+            return false;
+        if (current != end)
+            return false;
+        rgb = makeRGB(red, green, blue);
+        return true;
+    }
+
+    return false;
+}
+
+template<typename StringType>
+bool CSSPropertyParser::fastParseColor(RGBA32& rgb, const StringType& name, bool strict)
+{
+    unsigned length = name.length();
+    bool parseResult;
+
+    if (!length)
+        return false;
+
+    if (name.is8Bit())
+        parseResult = fastParseColorInternal(rgb, name.characters8(), length, strict);
+    else
+        parseResult = fastParseColorInternal(rgb, name.characters16(), length, strict);
+
+    if (parseResult)
+        return true;
+
+    // Try named colors.
+    Color tc;
+    if (!tc.setNamedColor(name))
+        return false;
+    rgb = tc.rgb();
+    return true;
+}
+
+template bool CSSPropertyParser::fastParseColor(RGBA32&, const String&, bool strict);
+
+inline double CSSPropertyParser::parsedDouble(CSSParserValue *v, ReleaseParsedCalcValueCondition releaseCalc)
+{
+    const double result = m_parsedCalculation ? m_parsedCalculation->doubleValue() : v->fValue;
+    if (releaseCalc == ReleaseParsedCalcValue)
+        m_parsedCalculation.release();
+    return result;
+}
+
+bool CSSPropertyParser::isCalculation(CSSParserValue* value)
+{
+    return (value->unit == CSSParserValue::Function)
+        && (equalIgnoringCase(value->function->name, "calc(")
+            || equalIgnoringCase(value->function->name, "-webkit-calc(")
+            || equalIgnoringCase(value->function->name, "-webkit-min(")
+            || equalIgnoringCase(value->function->name, "-webkit-max("));
+}
+
+inline int CSSPropertyParser::colorIntFromValue(CSSParserValue* v)
+{
+    bool isPercent;
+
+    if (m_parsedCalculation)
+        isPercent = m_parsedCalculation->category() == CalcPercent;
+    else
+        isPercent = v->unit == CSSPrimitiveValue::CSS_PERCENTAGE;
+
+    const double value = parsedDouble(v, ReleaseParsedCalcValue);
+
+    if (value <= 0.0)
+        return 0;
+
+    if (isPercent) {
+        if (value >= 100.0)
+            return 255;
+        return static_cast<int>(value * 256.0 / 100.0);
+    }
+
+    if (value >= 255.0)
+        return 255;
+
+    return static_cast<int>(value);
+}
+
+bool CSSPropertyParser::parseColorParameters(CSSParserValue* value, int* colorArray, bool parseAlpha)
+{
+    CSSParserValueList* args = value->function->args.get();
+    CSSParserValue* v = args->current();
+    Units unitType = FUnknown;
+    // Get the first value and its type
+    if (validUnit(v, FInteger, HTMLStandardMode))
+        unitType = FInteger;
+    else if (validUnit(v, FPercent, HTMLStandardMode))
+        unitType = FPercent;
+    else
+        return false;
+
+    colorArray[0] = colorIntFromValue(v);
+    for (int i = 1; i < 3; i++) {
+        v = args->next();
+        if (v->unit != CSSParserValue::Operator && v->iValue != ',')
+            return false;
+        v = args->next();
+        if (!validUnit(v, unitType, HTMLStandardMode))
+            return false;
+        colorArray[i] = colorIntFromValue(v);
+    }
+    if (parseAlpha) {
+        v = args->next();
+        if (v->unit != CSSParserValue::Operator && v->iValue != ',')
+            return false;
+        v = args->next();
+        if (!validUnit(v, FNumber, HTMLStandardMode))
+            return false;
+        const double value = parsedDouble(v, ReleaseParsedCalcValue);
+        // Convert the floating pointer number of alpha to an integer in the range [0, 256),
+        // with an equal distribution across all 256 values.
+        colorArray[3] = static_cast<int>(max(0.0, min(1.0, value)) * nextafter(256.0, 0.0));
+    }
+    return true;
+}
+
+// The CSS3 specification defines the format of a HSL color as
+// hsl(<number>, <percent>, <percent>)
+// and with alpha, the format is
+// hsla(<number>, <percent>, <percent>, <number>)
+// The first value, HUE, is in an angle with a value between 0 and 360
+bool CSSPropertyParser::parseHSLParameters(CSSParserValue* value, double* colorArray, bool parseAlpha)
+{
+    CSSParserValueList* args = value->function->args.get();
+    CSSParserValue* v = args->current();
+    // Get the first value
+    if (!validUnit(v, FNumber, HTMLStandardMode))
+        return false;
+    // normalize the Hue value and change it to be between 0 and 1.0
+    colorArray[0] = (((static_cast<int>(parsedDouble(v, ReleaseParsedCalcValue)) % 360) + 360) % 360) / 360.0;
+    for (int i = 1; i < 3; i++) {
+        v = args->next();
+        if (v->unit != CSSParserValue::Operator && v->iValue != ',')
+            return false;
+        v = args->next();
+        if (!validUnit(v, FPercent, HTMLStandardMode))
+            return false;
+        colorArray[i] = max(0.0, min(100.0, parsedDouble(v, ReleaseParsedCalcValue))) / 100.0; // needs to be value between 0 and 1.0
+    }
+    if (parseAlpha) {
+        v = args->next();
+        if (v->unit != CSSParserValue::Operator && v->iValue != ',')
+            return false;
+        v = args->next();
+        if (!validUnit(v, FNumber, HTMLStandardMode))
+            return false;
+        colorArray[3] = max(0.0, min(1.0, parsedDouble(v, ReleaseParsedCalcValue)));
+    }
+    return true;
+}
+
+PassRefPtrWillBeRawPtr<CSSPrimitiveValue> CSSPropertyParser::parseColor(CSSParserValue* value)
+{
+    RGBA32 c = Color::transparent;
+    if (!parseColorFromValue(value ? value : m_valueList->current(), c))
+        return nullptr;
+    return cssValuePool().createColorValue(c);
+}
+
+bool CSSPropertyParser::parseColorFromValue(CSSParserValue* value, RGBA32& c)
+{
+    if (inQuirksMode() && value->unit == CSSPrimitiveValue::CSS_NUMBER
+        && value->fValue >= 0. && value->fValue < 1000000.) {
+        String str = String::format("%06d", static_cast<int>((value->fValue+.5)));
+        // FIXME: This should be strict parsing for SVG as well.
+        if (!fastParseColor(c, str, !inQuirksMode()))
+            return false;
+    } else if (value->unit == CSSPrimitiveValue::CSS_PARSER_HEXCOLOR ||
+                value->unit == CSSPrimitiveValue::CSS_IDENT ||
+                (inQuirksMode() && value->unit == CSSPrimitiveValue::CSS_DIMENSION)) {
+        if (!fastParseColor(c, value->string, !inQuirksMode() && value->unit == CSSPrimitiveValue::CSS_IDENT))
+            return false;
+    } else if (value->unit == CSSParserValue::Function &&
+                value->function->args != 0 &&
+                value->function->args->size() == 5 /* rgb + two commas */ &&
+                equalIgnoringCase(value->function->name, "rgb(")) {
+        int colorValues[3];
+        if (!parseColorParameters(value, colorValues, false))
+            return false;
+        c = makeRGB(colorValues[0], colorValues[1], colorValues[2]);
+    } else {
+        if (value->unit == CSSParserValue::Function &&
+                value->function->args != 0 &&
+                value->function->args->size() == 7 /* rgba + three commas */ &&
+                equalIgnoringCase(value->function->name, "rgba(")) {
+            int colorValues[4];
+            if (!parseColorParameters(value, colorValues, true))
+                return false;
+            c = makeRGBA(colorValues[0], colorValues[1], colorValues[2], colorValues[3]);
+        } else if (value->unit == CSSParserValue::Function &&
+                    value->function->args != 0 &&
+                    value->function->args->size() == 5 /* hsl + two commas */ &&
+                    equalIgnoringCase(value->function->name, "hsl(")) {
+            double colorValues[3];
+            if (!parseHSLParameters(value, colorValues, false))
+                return false;
+            c = makeRGBAFromHSLA(colorValues[0], colorValues[1], colorValues[2], 1.0);
+        } else if (value->unit == CSSParserValue::Function &&
+                    value->function->args != 0 &&
+                    value->function->args->size() == 7 /* hsla + three commas */ &&
+                    equalIgnoringCase(value->function->name, "hsla(")) {
+            double colorValues[4];
+            if (!parseHSLParameters(value, colorValues, true))
+                return false;
+            c = makeRGBAFromHSLA(colorValues[0], colorValues[1], colorValues[2], colorValues[3]);
+        } else
+            return false;
+    }
+
+    return true;
+}
+
+// This class tracks parsing state for shadow values.  If it goes out of scope (e.g., due to an early return)
+// without the allowBreak bit being set, then it will clean up all of the objects and destroy them.
+class ShadowParseContext {
+    DISALLOW_ALLOCATION();
+public:
+    ShadowParseContext(CSSPropertyID prop, CSSPropertyParser* parser)
+        : property(prop)
+        , m_parser(parser)
+        , allowX(true)
+        , allowY(false)
+        , allowBlur(false)
+        , allowSpread(false)
+        , allowColor(true)
+        , allowStyle(prop == CSSPropertyWebkitBoxShadow || prop == CSSPropertyBoxShadow)
+        , allowBreak(true)
+    {
+    }
+
+    bool allowLength() { return allowX || allowY || allowBlur || allowSpread; }
+
+    void commitValue()
+    {
+        // Handle the ,, case gracefully by doing nothing.
+        if (x || y || blur || spread || color || style) {
+            if (!values)
+                values = CSSValueList::createCommaSeparated();
+
+            // Construct the current shadow value and add it to the list.
+            values->append(CSSShadowValue::create(x.release(), y.release(), blur.release(), spread.release(), style.release(), color.release()));
+        }
+
+        // Now reset for the next shadow value.
+        x = nullptr;
+        y = nullptr;
+        blur = nullptr;
+        spread = nullptr;
+        style = nullptr;
+        color = nullptr;
+
+        allowX = true;
+        allowColor = true;
+        allowBreak = true;
+        allowY = false;
+        allowBlur = false;
+        allowSpread = false;
+        allowStyle = property == CSSPropertyWebkitBoxShadow || property == CSSPropertyBoxShadow;
+    }
+
+    void commitLength(CSSParserValue* v)
+    {
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> val = m_parser->createPrimitiveNumericValue(v);
+
+        if (allowX) {
+            x = val.release();
+            allowX = false;
+            allowY = true;
+            allowColor = false;
+            allowStyle = false;
+            allowBreak = false;
+        } else if (allowY) {
+            y = val.release();
+            allowY = false;
+            allowBlur = true;
+            allowColor = true;
+            allowStyle = property == CSSPropertyWebkitBoxShadow || property == CSSPropertyBoxShadow;
+            allowBreak = true;
+        } else if (allowBlur) {
+            blur = val.release();
+            allowBlur = false;
+            allowSpread = property == CSSPropertyWebkitBoxShadow || property == CSSPropertyBoxShadow;
+        } else if (allowSpread) {
+            spread = val.release();
+            allowSpread = false;
+        }
+    }
+
+    void commitColor(PassRefPtrWillBeRawPtr<CSSPrimitiveValue> val)
+    {
+        color = val;
+        allowColor = false;
+        if (allowX) {
+            allowStyle = false;
+            allowBreak = false;
+        } else {
+            allowBlur = false;
+            allowSpread = false;
+            allowStyle = property == CSSPropertyWebkitBoxShadow || property == CSSPropertyBoxShadow;
+        }
+    }
+
+    void commitStyle(CSSParserValue* v)
+    {
+        style = cssValuePool().createIdentifierValue(v->id);
+        allowStyle = false;
+        if (allowX)
+            allowBreak = false;
+        else {
+            allowBlur = false;
+            allowSpread = false;
+            allowColor = false;
+        }
+    }
+
+    CSSPropertyID property;
+    CSSPropertyParser* m_parser;
+
+    RefPtrWillBeRawPtr<CSSValueList> values;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> x;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> y;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> blur;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> spread;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> style;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> color;
+
+    bool allowX;
+    bool allowY;
+    bool allowBlur;
+    bool allowSpread;
+    bool allowColor;
+    bool allowStyle; // inset or not.
+    bool allowBreak;
+};
+
+PassRefPtrWillBeRawPtr<CSSValueList> CSSPropertyParser::parseShadow(CSSParserValueList* valueList, CSSPropertyID propId)
+{
+    ShadowParseContext context(propId, this);
+    CSSParserValue* val;
+    while ((val = valueList->current())) {
+        // Check for a comma break first.
+        if (val->unit == CSSParserValue::Operator) {
+            if (val->iValue != ',' || !context.allowBreak) {
+                // Other operators aren't legal or we aren't done with the current shadow
+                // value.  Treat as invalid.
+                return nullptr;
+            }
+            // The value is good.  Commit it.
+            context.commitValue();
+        } else if (validUnit(val, FLength, HTMLStandardMode)) {
+            // We required a length and didn't get one. Invalid.
+            if (!context.allowLength())
+                return nullptr;
+
+            // Blur radius must be non-negative.
+            if (context.allowBlur && !validUnit(val, FLength | FNonNeg, HTMLStandardMode))
+                return nullptr;
+
+            // A length is allowed here.  Construct the value and add it.
+            context.commitLength(val);
+        } else if (val->id == CSSValueInset) {
+            if (!context.allowStyle)
+                return nullptr;
+
+            context.commitStyle(val);
+        } else {
+            // The only other type of value that's ok is a color value.
+            RefPtrWillBeRawPtr<CSSPrimitiveValue> parsedColor;
+            bool isColor = ((val->id >= CSSValueAqua && val->id <= CSSValueWindowtext) || val->id == CSSValueMenu
+                            || (val->id >= CSSValueWebkitFocusRingColor && val->id <= CSSValueWebkitText && inQuirksMode())
+                            || val->id == CSSValueCurrentcolor);
+            if (isColor) {
+                if (!context.allowColor)
+                    return nullptr;
+                parsedColor = cssValuePool().createIdentifierValue(val->id);
+            }
+
+            if (!parsedColor)
+                // It's not built-in. Try to parse it as a color.
+                parsedColor = parseColor(val);
+
+            if (!parsedColor || !context.allowColor)
+                return nullptr; // This value is not a color or length and is invalid or
+                          // it is a color, but a color isn't allowed at this point.
+
+            context.commitColor(parsedColor.release());
+        }
+
+        valueList->next();
+    }
+
+    if (context.allowBreak) {
+        context.commitValue();
+        if (context.values && context.values->length())
+            return context.values.release();
+    }
+
+    return nullptr;
+}
+
+bool CSSPropertyParser::parseReflect(CSSPropertyID propId, bool important)
+{
+    // box-reflect: <direction> <offset> <mask>
+
+    // Direction comes first.
+    CSSParserValue* val = m_valueList->current();
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> direction;
+    switch (val->id) {
+    case CSSValueAbove:
+    case CSSValueBelow:
+    case CSSValueLeft:
+    case CSSValueRight:
+        direction = cssValuePool().createIdentifierValue(val->id);
+        break;
+    default:
+        return false;
+    }
+
+    // The offset comes next.
+    val = m_valueList->next();
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> offset;
+    if (!val)
+        offset = cssValuePool().createValue(0, CSSPrimitiveValue::CSS_PX);
+    else {
+        if (!validUnit(val, FLength | FPercent))
+            return false;
+        offset = createPrimitiveNumericValue(val);
+    }
+
+    // Now for the mask.
+    RefPtrWillBeRawPtr<CSSValue> mask;
+    val = m_valueList->next();
+    if (val) {
+        mask = parseBorderImage(propId);
+        if (!mask)
+            return false;
+    }
+
+    RefPtrWillBeRawPtr<CSSReflectValue> reflectValue = CSSReflectValue::create(direction.release(), offset.release(), mask.release());
+    addProperty(propId, reflectValue.release(), important);
+    m_valueList->next();
+    return true;
+}
+
+bool CSSPropertyParser::parseFlex(CSSParserValueList* args, bool important)
+{
+    if (!args || !args->size() || args->size() > 3)
+        return false;
+    static const double unsetValue = -1;
+    double flexGrow = unsetValue;
+    double flexShrink = unsetValue;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> flexBasis;
+
+    while (CSSParserValue* arg = args->current()) {
+        if (validUnit(arg, FNumber | FNonNeg)) {
+            if (flexGrow == unsetValue)
+                flexGrow = arg->fValue;
+            else if (flexShrink == unsetValue)
+                flexShrink = arg->fValue;
+            else if (!arg->fValue) {
+                // flex only allows a basis of 0 (sans units) if flex-grow and flex-shrink values have already been set.
+                flexBasis = cssValuePool().createValue(0, CSSPrimitiveValue::CSS_PX);
+            } else {
+                // We only allow 3 numbers without units if the last value is 0. E.g., flex:1 1 1 is invalid.
+                return false;
+            }
+        } else if (!flexBasis && (arg->id == CSSValueAuto || validUnit(arg, FLength | FPercent | FNonNeg)))
+            flexBasis = parseValidPrimitive(arg->id, arg);
+        else {
+            // Not a valid arg for flex.
+            return false;
+        }
+        args->next();
+    }
+
+    if (flexGrow == unsetValue)
+        flexGrow = 1;
+    if (flexShrink == unsetValue)
+        flexShrink = 1;
+    if (!flexBasis)
+        flexBasis = cssValuePool().createValue(0, CSSPrimitiveValue::CSS_PX);
+
+    addProperty(CSSPropertyFlexGrow, cssValuePool().createValue(clampToFloat(flexGrow), CSSPrimitiveValue::CSS_NUMBER), important);
+    addProperty(CSSPropertyFlexShrink, cssValuePool().createValue(clampToFloat(flexShrink), CSSPrimitiveValue::CSS_NUMBER), important);
+    addProperty(CSSPropertyFlexBasis, flexBasis, important);
+    return true;
+}
+
+bool CSSPropertyParser::parseObjectPosition(bool important)
+{
+    RefPtrWillBeRawPtr<CSSValue> xValue;
+    RefPtrWillBeRawPtr<CSSValue> yValue;
+    parseFillPosition(m_valueList.get(), xValue, yValue);
+    if (!xValue || !yValue)
+        return false;
+    addProperty(
+        CSSPropertyObjectPosition,
+        createPrimitiveValuePair(toCSSPrimitiveValue(xValue.get()), toCSSPrimitiveValue(yValue.get()), Pair::KeepIdenticalValues),
+        important);
+    return true;
+}
+
+class BorderImageParseContext {
+    DISALLOW_ALLOCATION();
+public:
+    BorderImageParseContext()
+    : m_canAdvance(false)
+    , m_allowCommit(true)
+    , m_allowImage(true)
+    , m_allowImageSlice(true)
+    , m_allowRepeat(true)
+    , m_allowForwardSlashOperator(false)
+    , m_requireWidth(false)
+    , m_requireOutset(false)
+    {}
+
+    bool canAdvance() const { return m_canAdvance; }
+    void setCanAdvance(bool canAdvance) { m_canAdvance = canAdvance; }
+
+    bool allowCommit() const { return m_allowCommit; }
+    bool allowImage() const { return m_allowImage; }
+    bool allowImageSlice() const { return m_allowImageSlice; }
+    bool allowRepeat() const { return m_allowRepeat; }
+    bool allowForwardSlashOperator() const { return m_allowForwardSlashOperator; }
+
+    bool requireWidth() const { return m_requireWidth; }
+    bool requireOutset() const { return m_requireOutset; }
+
+    void commitImage(PassRefPtrWillBeRawPtr<CSSValue> image)
+    {
+        m_image = image;
+        m_canAdvance = true;
+        m_allowCommit = true;
+        m_allowImage = m_allowForwardSlashOperator = m_requireWidth = m_requireOutset = false;
+        m_allowImageSlice = !m_imageSlice;
+        m_allowRepeat = !m_repeat;
+    }
+    void commitImageSlice(PassRefPtrWillBeRawPtr<CSSBorderImageSliceValue> slice)
+    {
+        m_imageSlice = slice;
+        m_canAdvance = true;
+        m_allowCommit = m_allowForwardSlashOperator = true;
+        m_allowImageSlice = m_requireWidth = m_requireOutset = false;
+        m_allowImage = !m_image;
+        m_allowRepeat = !m_repeat;
+    }
+    void commitForwardSlashOperator()
+    {
+        m_canAdvance = true;
+        m_allowCommit = m_allowImage = m_allowImageSlice = m_allowRepeat = m_allowForwardSlashOperator = false;
+        if (!m_borderSlice) {
+            m_requireWidth = true;
+            m_requireOutset = false;
+        } else {
+            m_requireOutset = true;
+            m_requireWidth = false;
+        }
+    }
+    void commitBorderWidth(PassRefPtrWillBeRawPtr<CSSPrimitiveValue> slice)
+    {
+        m_borderSlice = slice;
+        m_canAdvance = true;
+        m_allowCommit = m_allowForwardSlashOperator = true;
+        m_allowImageSlice = m_requireWidth = m_requireOutset = false;
+        m_allowImage = !m_image;
+        m_allowRepeat = !m_repeat;
+    }
+    void commitBorderOutset(PassRefPtrWillBeRawPtr<CSSPrimitiveValue> outset)
+    {
+        m_outset = outset;
+        m_canAdvance = true;
+        m_allowCommit = true;
+        m_allowImageSlice = m_allowForwardSlashOperator = m_requireWidth = m_requireOutset = false;
+        m_allowImage = !m_image;
+        m_allowRepeat = !m_repeat;
+    }
+    void commitRepeat(PassRefPtrWillBeRawPtr<CSSValue> repeat)
+    {
+        m_repeat = repeat;
+        m_canAdvance = true;
+        m_allowCommit = true;
+        m_allowRepeat = m_allowForwardSlashOperator = m_requireWidth = m_requireOutset = false;
+        m_allowImageSlice = !m_imageSlice;
+        m_allowImage = !m_image;
+    }
+
+    PassRefPtrWillBeRawPtr<CSSValue> commitCSSValue()
+    {
+        return createBorderImageValue(m_image, m_imageSlice, m_borderSlice, m_outset, m_repeat);
+    }
+
+    void commitMaskBoxImage(CSSPropertyParser* parser, bool important)
+    {
+        commitBorderImageProperty(CSSPropertyWebkitMaskBoxImageSource, parser, m_image, important);
+        commitBorderImageProperty(CSSPropertyWebkitMaskBoxImageSlice, parser, m_imageSlice, important);
+        commitBorderImageProperty(CSSPropertyWebkitMaskBoxImageWidth, parser, m_borderSlice, important);
+        commitBorderImageProperty(CSSPropertyWebkitMaskBoxImageOutset, parser, m_outset, important);
+        commitBorderImageProperty(CSSPropertyWebkitMaskBoxImageRepeat, parser, m_repeat, important);
+    }
+
+    void commitBorderImage(CSSPropertyParser* parser, bool important)
+    {
+        commitBorderImageProperty(CSSPropertyBorderImageSource, parser, m_image, important);
+        commitBorderImageProperty(CSSPropertyBorderImageSlice, parser, m_imageSlice, important);
+        commitBorderImageProperty(CSSPropertyBorderImageWidth, parser, m_borderSlice, important);
+        commitBorderImageProperty(CSSPropertyBorderImageOutset, parser, m_outset, important);
+        commitBorderImageProperty(CSSPropertyBorderImageRepeat, parser, m_repeat, important);
+    }
+
+    void commitBorderImageProperty(CSSPropertyID propId, CSSPropertyParser* parser, PassRefPtrWillBeRawPtr<CSSValue> value, bool important)
+    {
+        if (value)
+            parser->addProperty(propId, value, important);
+        else
+            parser->addProperty(propId, cssValuePool().createImplicitInitialValue(), important, true);
+    }
+
+    static bool buildFromParser(CSSPropertyParser&, CSSPropertyID, BorderImageParseContext&);
+
+    bool m_canAdvance;
+
+    bool m_allowCommit;
+    bool m_allowImage;
+    bool m_allowImageSlice;
+    bool m_allowRepeat;
+    bool m_allowForwardSlashOperator;
+
+    bool m_requireWidth;
+    bool m_requireOutset;
+
+    RefPtrWillBeRawPtr<CSSValue> m_image;
+    RefPtrWillBeRawPtr<CSSBorderImageSliceValue> m_imageSlice;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> m_borderSlice;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> m_outset;
+
+    RefPtrWillBeRawPtr<CSSValue> m_repeat;
+};
+
+bool BorderImageParseContext::buildFromParser(CSSPropertyParser& parser, CSSPropertyID propId, BorderImageParseContext& context)
+{
+    CSSPropertyParser::ShorthandScope scope(&parser, propId);
+    while (CSSParserValue* val = parser.m_valueList->current()) {
+        context.setCanAdvance(false);
+
+        if (!context.canAdvance() && context.allowForwardSlashOperator() && isForwardSlashOperator(val))
+            context.commitForwardSlashOperator();
+
+        if (!context.canAdvance() && context.allowImage()) {
+            if (val->unit == CSSPrimitiveValue::CSS_URI) {
+                context.commitImage(CSSImageValue::create(val->string, parser.m_context.completeURL(val->string)));
+            } else if (isGeneratedImageValue(val)) {
+                RefPtrWillBeRawPtr<CSSValue> value;
+                if (parser.parseGeneratedImage(parser.m_valueList.get(), value))
+                    context.commitImage(value.release());
+                else
+                    return false;
+            } else if (val->unit == CSSParserValue::Function && equalIgnoringCase(val->function->name, "-webkit-image-set(")) {
+                RefPtrWillBeRawPtr<CSSValue> value = parser.parseImageSet(parser.m_valueList.get());
+                if (value)
+                    context.commitImage(value.release());
+                else
+                    return false;
+            } else if (val->id == CSSValueNone)
+                context.commitImage(cssValuePool().createIdentifierValue(CSSValueNone));
+        }
+
+        if (!context.canAdvance() && context.allowImageSlice()) {
+            RefPtrWillBeRawPtr<CSSBorderImageSliceValue> imageSlice;
+            if (parser.parseBorderImageSlice(propId, imageSlice))
+                context.commitImageSlice(imageSlice.release());
+        }
+
+        if (!context.canAdvance() && context.allowRepeat()) {
+            RefPtrWillBeRawPtr<CSSValue> repeat;
+            if (parser.parseBorderImageRepeat(repeat))
+                context.commitRepeat(repeat.release());
+        }
+
+        if (!context.canAdvance() && context.requireWidth()) {
+            RefPtrWillBeRawPtr<CSSPrimitiveValue> borderSlice;
+            if (parser.parseBorderImageWidth(borderSlice))
+                context.commitBorderWidth(borderSlice.release());
+        }
+
+        if (!context.canAdvance() && context.requireOutset()) {
+            RefPtrWillBeRawPtr<CSSPrimitiveValue> borderOutset;
+            if (parser.parseBorderImageOutset(borderOutset))
+                context.commitBorderOutset(borderOutset.release());
+        }
+
+        if (!context.canAdvance())
+            return false;
+
+        parser.m_valueList->next();
+    }
+
+    return context.allowCommit();
+}
+
+bool CSSPropertyParser::parseBorderImageShorthand(CSSPropertyID propId, bool important)
+{
+    BorderImageParseContext context;
+    if (BorderImageParseContext::buildFromParser(*this, propId, context)) {
+        switch (propId) {
+        case CSSPropertyWebkitMaskBoxImage:
+            context.commitMaskBoxImage(this, important);
+            return true;
+        case CSSPropertyBorderImage:
+            context.commitBorderImage(this, important);
+            return true;
+        default:
+            ASSERT_NOT_REACHED();
+            return false;
+        }
+    }
+    return false;
+}
+
+PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseBorderImage(CSSPropertyID propId)
+{
+    BorderImageParseContext context;
+    if (BorderImageParseContext::buildFromParser(*this, propId, context)) {
+        return context.commitCSSValue();
+    }
+    return nullptr;
+}
+
+static bool isBorderImageRepeatKeyword(int id)
+{
+    return id == CSSValueStretch || id == CSSValueRepeat || id == CSSValueSpace || id == CSSValueRound;
+}
+
+bool CSSPropertyParser::parseBorderImageRepeat(RefPtrWillBeRawPtr<CSSValue>& result)
+{
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> firstValue;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> secondValue;
+    CSSParserValue* val = m_valueList->current();
+    if (!val)
+        return false;
+    if (isBorderImageRepeatKeyword(val->id))
+        firstValue = cssValuePool().createIdentifierValue(val->id);
+    else
+        return false;
+
+    val = m_valueList->next();
+    if (val) {
+        if (isBorderImageRepeatKeyword(val->id))
+            secondValue = cssValuePool().createIdentifierValue(val->id);
+        else if (!inShorthand()) {
+            // If we're not parsing a shorthand then we are invalid.
+            return false;
+        } else {
+            // We need to rewind the value list, so that when its advanced we'll
+            // end up back at this value.
+            m_valueList->previous();
+            secondValue = firstValue;
+        }
+    } else
+        secondValue = firstValue;
+
+    result = createPrimitiveValuePair(firstValue, secondValue);
+    return true;
+}
+
+class BorderImageSliceParseContext {
+    DISALLOW_ALLOCATION();
+public:
+    BorderImageSliceParseContext(CSSPropertyParser* parser)
+    : m_parser(parser)
+    , m_allowNumber(true)
+    , m_allowFill(true)
+    , m_allowFinalCommit(false)
+    , m_fill(false)
+    { }
+
+    bool allowNumber() const { return m_allowNumber; }
+    bool allowFill() const { return m_allowFill; }
+    bool allowFinalCommit() const { return m_allowFinalCommit; }
+    CSSPrimitiveValue* top() const { return m_top.get(); }
+
+    void commitNumber(CSSParserValue* v)
+    {
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> val = m_parser->createPrimitiveNumericValue(v);
+        if (!m_top)
+            m_top = val;
+        else if (!m_right)
+            m_right = val;
+        else if (!m_bottom)
+            m_bottom = val;
+        else {
+            ASSERT(!m_left);
+            m_left = val;
+        }
+
+        m_allowNumber = !m_left;
+        m_allowFinalCommit = true;
+    }
+
+    void commitFill() { m_fill = true; m_allowFill = false; m_allowNumber = !m_top; }
+
+    PassRefPtrWillBeRawPtr<CSSBorderImageSliceValue> commitBorderImageSlice()
+    {
+        // We need to clone and repeat values for any omissions.
+        ASSERT(m_top);
+        if (!m_right) {
+            m_right = m_top;
+            m_bottom = m_top;
+            m_left = m_top;
+        }
+        if (!m_bottom) {
+            m_bottom = m_top;
+            m_left = m_right;
+        }
+        if (!m_left)
+            m_left = m_right;
+
+        // Now build a rect value to hold all four of our primitive values.
+        RefPtrWillBeRawPtr<Quad> quad = Quad::create();
+        quad->setTop(m_top);
+        quad->setRight(m_right);
+        quad->setBottom(m_bottom);
+        quad->setLeft(m_left);
+
+        // Make our new border image value now.
+        return CSSBorderImageSliceValue::create(cssValuePool().createValue(quad.release()), m_fill);
+    }
+
+private:
+    CSSPropertyParser* m_parser;
+
+    bool m_allowNumber;
+    bool m_allowFill;
+    bool m_allowFinalCommit;
+
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> m_top;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> m_right;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> m_bottom;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> m_left;
+
+    bool m_fill;
+};
+
+bool CSSPropertyParser::parseBorderImageSlice(CSSPropertyID propId, RefPtrWillBeRawPtr<CSSBorderImageSliceValue>& result)
+{
+    BorderImageSliceParseContext context(this);
+    CSSParserValue* val;
+    while ((val = m_valueList->current())) {
+        // FIXME calc() http://webkit.org/b/16662 : calc is parsed but values are not created yet.
+        if (context.allowNumber() && !isCalculation(val) && validUnit(val, FInteger | FNonNeg | FPercent, HTMLStandardMode)) {
+            context.commitNumber(val);
+        } else if (context.allowFill() && val->id == CSSValueFill)
+            context.commitFill();
+        else if (!inShorthand()) {
+            // If we're not parsing a shorthand then we are invalid.
+            return false;
+        } else {
+            if (context.allowFinalCommit()) {
+                // We're going to successfully parse, but we don't want to consume this token.
+                m_valueList->previous();
+            }
+            break;
+        }
+        m_valueList->next();
+    }
+
+    if (context.allowFinalCommit()) {
+        // FIXME: For backwards compatibility, -webkit-border-image, -webkit-mask-box-image and -webkit-box-reflect have to do a fill by default.
+        // FIXME: What do we do with -webkit-box-reflect and -webkit-mask-box-image? Probably just have to leave them filling...
+        if (propId == CSSPropertyWebkitBorderImage || propId == CSSPropertyWebkitMaskBoxImage || propId == CSSPropertyWebkitBoxReflect)
+            context.commitFill();
+
+        // Need to fully commit as a single value.
+        result = context.commitBorderImageSlice();
+        return true;
+    }
+
+    return false;
+}
+
+class BorderImageQuadParseContext {
+public:
+    BorderImageQuadParseContext(CSSPropertyParser* parser)
+    : m_parser(parser)
+    , m_allowNumber(true)
+    , m_allowFinalCommit(false)
+    { }
+
+    bool allowNumber() const { return m_allowNumber; }
+    bool allowFinalCommit() const { return m_allowFinalCommit; }
+    CSSPrimitiveValue* top() const { return m_top.get(); }
+
+    void commitNumber(CSSParserValue* v)
+    {
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> val;
+        if (v->id == CSSValueAuto)
+            val = cssValuePool().createIdentifierValue(v->id);
+        else
+            val = m_parser->createPrimitiveNumericValue(v);
+
+        if (!m_top)
+            m_top = val;
+        else if (!m_right)
+            m_right = val;
+        else if (!m_bottom)
+            m_bottom = val;
+        else {
+            ASSERT(!m_left);
+            m_left = val;
+        }
+
+        m_allowNumber = !m_left;
+        m_allowFinalCommit = true;
+    }
+
+    void setAllowFinalCommit() { m_allowFinalCommit = true; }
+    void setTop(PassRefPtrWillBeRawPtr<CSSPrimitiveValue> val) { m_top = val; }
+
+    PassRefPtrWillBeRawPtr<CSSPrimitiveValue> commitBorderImageQuad()
+    {
+        // We need to clone and repeat values for any omissions.
+        ASSERT(m_top);
+        if (!m_right) {
+            m_right = m_top;
+            m_bottom = m_top;
+            m_left = m_top;
+        }
+        if (!m_bottom) {
+            m_bottom = m_top;
+            m_left = m_right;
+        }
+        if (!m_left)
+            m_left = m_right;
+
+        // Now build a quad value to hold all four of our primitive values.
+        RefPtrWillBeRawPtr<Quad> quad = Quad::create();
+        quad->setTop(m_top);
+        quad->setRight(m_right);
+        quad->setBottom(m_bottom);
+        quad->setLeft(m_left);
+
+        // Make our new value now.
+        return cssValuePool().createValue(quad.release());
+    }
+
+private:
+    CSSPropertyParser* m_parser;
+
+    bool m_allowNumber;
+    bool m_allowFinalCommit;
+
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> m_top;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> m_right;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> m_bottom;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> m_left;
+};
+
+bool CSSPropertyParser::parseBorderImageQuad(Units validUnits, RefPtrWillBeRawPtr<CSSPrimitiveValue>& result)
+{
+    BorderImageQuadParseContext context(this);
+    CSSParserValue* val;
+    while ((val = m_valueList->current())) {
+        if (context.allowNumber() && (validUnit(val, validUnits, HTMLStandardMode) || val->id == CSSValueAuto)) {
+            context.commitNumber(val);
+        } else if (!inShorthand()) {
+            // If we're not parsing a shorthand then we are invalid.
+            return false;
+        } else {
+            if (context.allowFinalCommit())
+                m_valueList->previous(); // The shorthand loop will advance back to this point.
+            break;
+        }
+        m_valueList->next();
+    }
+
+    if (context.allowFinalCommit()) {
+        // Need to fully commit as a single value.
+        result = context.commitBorderImageQuad();
+        return true;
+    }
+    return false;
+}
+
+bool CSSPropertyParser::parseBorderImageWidth(RefPtrWillBeRawPtr<CSSPrimitiveValue>& result)
+{
+    return parseBorderImageQuad(FLength | FNumber | FNonNeg | FPercent, result);
+}
+
+bool CSSPropertyParser::parseBorderImageOutset(RefPtrWillBeRawPtr<CSSPrimitiveValue>& result)
+{
+    return parseBorderImageQuad(FLength | FNumber | FNonNeg, result);
+}
+
+bool CSSPropertyParser::parseBorderRadius(CSSPropertyID propId, bool important)
+{
+    unsigned num = m_valueList->size();
+    if (num > 9)
+        return false;
+
+    ShorthandScope scope(this, propId);
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> radii[2][4];
+
+    unsigned indexAfterSlash = 0;
+    for (unsigned i = 0; i < num; ++i) {
+        CSSParserValue* value = m_valueList->valueAt(i);
+        if (value->unit == CSSParserValue::Operator) {
+            if (value->iValue != '/')
+                return false;
+
+            if (!i || indexAfterSlash || i + 1 == num || num > i + 5)
+                return false;
+
+            indexAfterSlash = i + 1;
+            completeBorderRadii(radii[0]);
+            continue;
+        }
+
+        if (i - indexAfterSlash >= 4)
+            return false;
+
+        if (!validUnit(value, FLength | FPercent | FNonNeg))
+            return false;
+
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> radius = createPrimitiveNumericValue(value);
+
+        if (!indexAfterSlash) {
+            radii[0][i] = radius;
+
+            // Legacy syntax: -webkit-border-radius: l1 l2; is equivalent to border-radius: l1 / l2;
+            if (num == 2 && propId == CSSPropertyWebkitBorderRadius) {
+                indexAfterSlash = 1;
+                completeBorderRadii(radii[0]);
+            }
+        } else
+            radii[1][i - indexAfterSlash] = radius.release();
+    }
+
+    if (!indexAfterSlash) {
+        completeBorderRadii(radii[0]);
+        for (unsigned i = 0; i < 4; ++i)
+            radii[1][i] = radii[0][i];
+    } else
+        completeBorderRadii(radii[1]);
+
+    ImplicitScope implicitScope(this, PropertyImplicit);
+    addProperty(CSSPropertyBorderTopLeftRadius, createPrimitiveValuePair(radii[0][0].release(), radii[1][0].release()), important);
+    addProperty(CSSPropertyBorderTopRightRadius, createPrimitiveValuePair(radii[0][1].release(), radii[1][1].release()), important);
+    addProperty(CSSPropertyBorderBottomRightRadius, createPrimitiveValuePair(radii[0][2].release(), radii[1][2].release()), important);
+    addProperty(CSSPropertyBorderBottomLeftRadius, createPrimitiveValuePair(radii[0][3].release(), radii[1][3].release()), important);
+    return true;
+}
+
+bool CSSPropertyParser::parseAspectRatio(bool important)
+{
+    unsigned num = m_valueList->size();
+    if (num == 1 && m_valueList->valueAt(0)->id == CSSValueNone) {
+        addProperty(CSSPropertyWebkitAspectRatio, cssValuePool().createIdentifierValue(CSSValueNone), important);
+        return true;
+    }
+
+    if (num != 3)
+        return false;
+
+    CSSParserValue* lvalue = m_valueList->valueAt(0);
+    CSSParserValue* op = m_valueList->valueAt(1);
+    CSSParserValue* rvalue = m_valueList->valueAt(2);
+
+    if (!isForwardSlashOperator(op))
+        return false;
+
+    if (!validUnit(lvalue, FNumber | FNonNeg) || !validUnit(rvalue, FNumber | FNonNeg))
+        return false;
+
+    if (!lvalue->fValue || !rvalue->fValue)
+        return false;
+
+    addProperty(CSSPropertyWebkitAspectRatio, CSSAspectRatioValue::create(narrowPrecisionToFloat(lvalue->fValue), narrowPrecisionToFloat(rvalue->fValue)), important);
+
+    return true;
+}
+
+bool CSSPropertyParser::parseCounter(CSSPropertyID propId, int defaultValue, bool important)
+{
+    enum { ID, VAL } state = ID;
+
+    RefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createCommaSeparated();
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> counterName;
+
+    while (true) {
+        CSSParserValue* val = m_valueList->current();
+        switch (state) {
+            case ID:
+                if (val && val->unit == CSSPrimitiveValue::CSS_IDENT) {
+                    counterName = createPrimitiveStringValue(val);
+                    state = VAL;
+                    m_valueList->next();
+                    continue;
+                }
+                break;
+            case VAL: {
+                int i = defaultValue;
+                if (val && val->unit == CSSPrimitiveValue::CSS_NUMBER) {
+                    i = clampToInteger(val->fValue);
+                    m_valueList->next();
+                }
+
+                list->append(createPrimitiveValuePair(counterName.release(),
+                    cssValuePool().createValue(i, CSSPrimitiveValue::CSS_NUMBER)));
+                state = ID;
+                continue;
+            }
+        }
+        break;
+    }
+
+    if (list->length() > 0) {
+        addProperty(propId, list.release(), important);
+        return true;
+    }
+
+    return false;
+}
+
+// This should go away once we drop support for -webkit-gradient
+static PassRefPtrWillBeRawPtr<CSSPrimitiveValue> parseDeprecatedGradientPoint(CSSParserValue* a, bool horizontal)
+{
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> result;
+    if (a->unit == CSSPrimitiveValue::CSS_IDENT) {
+        if ((equalIgnoringCase(a, "left") && horizontal)
+            || (equalIgnoringCase(a, "top") && !horizontal))
+            result = cssValuePool().createValue(0., CSSPrimitiveValue::CSS_PERCENTAGE);
+        else if ((equalIgnoringCase(a, "right") && horizontal)
+                 || (equalIgnoringCase(a, "bottom") && !horizontal))
+            result = cssValuePool().createValue(100., CSSPrimitiveValue::CSS_PERCENTAGE);
+        else if (equalIgnoringCase(a, "center"))
+            result = cssValuePool().createValue(50., CSSPrimitiveValue::CSS_PERCENTAGE);
+    } else if (a->unit == CSSPrimitiveValue::CSS_NUMBER || a->unit == CSSPrimitiveValue::CSS_PERCENTAGE)
+        result = cssValuePool().createValue(a->fValue, static_cast<CSSPrimitiveValue::UnitTypes>(a->unit));
+    return result;
+}
+
+bool parseDeprecatedGradientColorStop(CSSPropertyParser* p, CSSParserValue* a, CSSGradientColorStop& stop)
+{
+    if (a->unit != CSSParserValue::Function)
+        return false;
+
+    if (!equalIgnoringCase(a->function->name, "from(") &&
+        !equalIgnoringCase(a->function->name, "to(") &&
+        !equalIgnoringCase(a->function->name, "color-stop("))
+        return false;
+
+    CSSParserValueList* args = a->function->args.get();
+    if (!args)
+        return false;
+
+    if (equalIgnoringCase(a->function->name, "from(")
+        || equalIgnoringCase(a->function->name, "to(")) {
+        // The "from" and "to" stops expect 1 argument.
+        if (args->size() != 1)
+            return false;
+
+        if (equalIgnoringCase(a->function->name, "from("))
+            stop.m_position = cssValuePool().createValue(0, CSSPrimitiveValue::CSS_NUMBER);
+        else
+            stop.m_position = cssValuePool().createValue(1, CSSPrimitiveValue::CSS_NUMBER);
+
+        CSSValueID id = args->current()->id;
+        if (id == CSSValueWebkitText || (id >= CSSValueAqua && id <= CSSValueWindowtext) || id == CSSValueMenu)
+            stop.m_color = cssValuePool().createIdentifierValue(id);
+        else
+            stop.m_color = p->parseColor(args->current());
+        if (!stop.m_color)
+            return false;
+    }
+
+    // The "color-stop" function expects 3 arguments.
+    if (equalIgnoringCase(a->function->name, "color-stop(")) {
+        if (args->size() != 3)
+            return false;
+
+        CSSParserValue* stopArg = args->current();
+        if (stopArg->unit == CSSPrimitiveValue::CSS_PERCENTAGE)
+            stop.m_position = cssValuePool().createValue(stopArg->fValue / 100, CSSPrimitiveValue::CSS_NUMBER);
+        else if (stopArg->unit == CSSPrimitiveValue::CSS_NUMBER)
+            stop.m_position = cssValuePool().createValue(stopArg->fValue, CSSPrimitiveValue::CSS_NUMBER);
+        else
+            return false;
+
+        stopArg = args->next();
+        if (stopArg->unit != CSSParserValue::Operator || stopArg->iValue != ',')
+            return false;
+
+        stopArg = args->next();
+        CSSValueID id = stopArg->id;
+        if (id == CSSValueWebkitText || (id >= CSSValueAqua && id <= CSSValueWindowtext) || id == CSSValueMenu)
+            stop.m_color = cssValuePool().createIdentifierValue(id);
+        else
+            stop.m_color = p->parseColor(stopArg);
+        if (!stop.m_color)
+            return false;
+    }
+
+    return true;
+}
+
+bool CSSPropertyParser::parseDeprecatedGradient(CSSParserValueList* valueList, RefPtrWillBeRawPtr<CSSValue>& gradient)
+{
+    // Walk the arguments.
+    CSSParserValueList* args = valueList->current()->function->args.get();
+    if (!args || args->size() == 0)
+        return false;
+
+    // The first argument is the gradient type.  It is an identifier.
+    CSSGradientType gradientType;
+    CSSParserValue* a = args->current();
+    if (!a || a->unit != CSSPrimitiveValue::CSS_IDENT)
+        return false;
+    if (equalIgnoringCase(a, "linear"))
+        gradientType = CSSDeprecatedLinearGradient;
+    else if (equalIgnoringCase(a, "radial"))
+        gradientType = CSSDeprecatedRadialGradient;
+    else
+        return false;
+
+    RefPtrWillBeRawPtr<CSSGradientValue> result;
+    switch (gradientType) {
+    case CSSDeprecatedLinearGradient:
+        result = CSSLinearGradientValue::create(NonRepeating, gradientType);
+        break;
+    case CSSDeprecatedRadialGradient:
+        result = CSSRadialGradientValue::create(NonRepeating, gradientType);
+        break;
+    default:
+        // The rest of the gradient types shouldn't appear here.
+        ASSERT_NOT_REACHED();
+    }
+
+    // Comma.
+    a = args->next();
+    if (!isComma(a))
+        return false;
+
+    // Next comes the starting point for the gradient as an x y pair.  There is no
+    // comma between the x and the y values.
+    // First X.  It can be left, right, number or percent.
+    a = args->next();
+    if (!a)
+        return false;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> point = parseDeprecatedGradientPoint(a, true);
+    if (!point)
+        return false;
+    result->setFirstX(point.release());
+
+    // First Y.  It can be top, bottom, number or percent.
+    a = args->next();
+    if (!a)
+        return false;
+    point = parseDeprecatedGradientPoint(a, false);
+    if (!point)
+        return false;
+    result->setFirstY(point.release());
+
+    // Comma after the first point.
+    a = args->next();
+    if (!isComma(a))
+        return false;
+
+    // For radial gradients only, we now expect a numeric radius.
+    if (gradientType == CSSDeprecatedRadialGradient) {
+        a = args->next();
+        if (!a || a->unit != CSSPrimitiveValue::CSS_NUMBER)
+            return false;
+        toCSSRadialGradientValue(result.get())->setFirstRadius(createPrimitiveNumericValue(a));
+
+        // Comma after the first radius.
+        a = args->next();
+        if (!isComma(a))
+            return false;
+    }
+
+    // Next is the ending point for the gradient as an x, y pair.
+    // Second X.  It can be left, right, number or percent.
+    a = args->next();
+    if (!a)
+        return false;
+    point = parseDeprecatedGradientPoint(a, true);
+    if (!point)
+        return false;
+    result->setSecondX(point.release());
+
+    // Second Y.  It can be top, bottom, number or percent.
+    a = args->next();
+    if (!a)
+        return false;
+    point = parseDeprecatedGradientPoint(a, false);
+    if (!point)
+        return false;
+    result->setSecondY(point.release());
+
+    // For radial gradients only, we now expect the second radius.
+    if (gradientType == CSSDeprecatedRadialGradient) {
+        // Comma after the second point.
+        a = args->next();
+        if (!isComma(a))
+            return false;
+
+        a = args->next();
+        if (!a || a->unit != CSSPrimitiveValue::CSS_NUMBER)
+            return false;
+        toCSSRadialGradientValue(result.get())->setSecondRadius(createPrimitiveNumericValue(a));
+    }
+
+    // We now will accept any number of stops (0 or more).
+    a = args->next();
+    while (a) {
+        // Look for the comma before the next stop.
+        if (!isComma(a))
+            return false;
+
+        // Now examine the stop itself.
+        a = args->next();
+        if (!a)
+            return false;
+
+        // The function name needs to be one of "from", "to", or "color-stop."
+        CSSGradientColorStop stop;
+        if (!parseDeprecatedGradientColorStop(this, a, stop))
+            return false;
+        result->addStop(stop);
+
+        // Advance
+        a = args->next();
+    }
+
+    gradient = result.release();
+    return true;
+}
+
+static PassRefPtrWillBeRawPtr<CSSPrimitiveValue> valueFromSideKeyword(CSSParserValue* a, bool& isHorizontal)
+{
+    if (a->unit != CSSPrimitiveValue::CSS_IDENT)
+        return nullptr;
+
+    switch (a->id) {
+        case CSSValueLeft:
+        case CSSValueRight:
+            isHorizontal = true;
+            break;
+        case CSSValueTop:
+        case CSSValueBottom:
+            isHorizontal = false;
+            break;
+        default:
+            return nullptr;
+    }
+    return cssValuePool().createIdentifierValue(a->id);
+}
+
+PassRefPtrWillBeRawPtr<CSSPrimitiveValue> parseGradientColorOrKeyword(CSSPropertyParser* p, CSSParserValue* value)
+{
+    CSSValueID id = value->id;
+    if (id == CSSValueWebkitText || (id >= CSSValueAqua && id <= CSSValueWindowtext) || id == CSSValueMenu || id == CSSValueCurrentcolor)
+        return cssValuePool().createIdentifierValue(id);
+
+    return p->parseColor(value);
+}
+
+bool CSSPropertyParser::parseDeprecatedLinearGradient(CSSParserValueList* valueList, RefPtrWillBeRawPtr<CSSValue>& gradient, CSSGradientRepeat repeating)
+{
+    RefPtrWillBeRawPtr<CSSLinearGradientValue> result = CSSLinearGradientValue::create(repeating, CSSPrefixedLinearGradient);
+
+    // Walk the arguments.
+    CSSParserValueList* args = valueList->current()->function->args.get();
+    if (!args || !args->size())
+        return false;
+
+    CSSParserValue* a = args->current();
+    if (!a)
+        return false;
+
+    bool expectComma = false;
+    // Look for angle.
+    if (validUnit(a, FAngle, HTMLStandardMode)) {
+        result->setAngle(createPrimitiveNumericValue(a));
+
+        args->next();
+        expectComma = true;
+    } else {
+        // Look one or two optional keywords that indicate a side or corner.
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> startX, startY;
+
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> location;
+        bool isHorizontal = false;
+        if ((location = valueFromSideKeyword(a, isHorizontal))) {
+            if (isHorizontal)
+                startX = location;
+            else
+                startY = location;
+
+            if ((a = args->next())) {
+                if ((location = valueFromSideKeyword(a, isHorizontal))) {
+                    if (isHorizontal) {
+                        if (startX)
+                            return false;
+                        startX = location;
+                    } else {
+                        if (startY)
+                            return false;
+                        startY = location;
+                    }
+
+                    args->next();
+                }
+            }
+
+            expectComma = true;
+        }
+
+        if (!startX && !startY)
+            startY = cssValuePool().createIdentifierValue(CSSValueTop);
+
+        result->setFirstX(startX.release());
+        result->setFirstY(startY.release());
+    }
+
+    if (!parseGradientColorStops(args, result.get(), expectComma))
+        return false;
+
+    if (!result->stopCount())
+        return false;
+
+    gradient = result.release();
+    return true;
+}
+
+bool CSSPropertyParser::parseDeprecatedRadialGradient(CSSParserValueList* valueList, RefPtrWillBeRawPtr<CSSValue>& gradient, CSSGradientRepeat repeating)
+{
+    RefPtrWillBeRawPtr<CSSRadialGradientValue> result = CSSRadialGradientValue::create(repeating, CSSPrefixedRadialGradient);
+
+    // Walk the arguments.
+    CSSParserValueList* args = valueList->current()->function->args.get();
+    if (!args || !args->size())
+        return false;
+
+    CSSParserValue* a = args->current();
+    if (!a)
+        return false;
+
+    bool expectComma = false;
+
+    // Optional background-position
+    RefPtrWillBeRawPtr<CSSValue> centerX;
+    RefPtrWillBeRawPtr<CSSValue> centerY;
+    // parse2ValuesFillPosition advances the args next pointer.
+    parse2ValuesFillPosition(args, centerX, centerY);
+    a = args->current();
+    if (!a)
+        return false;
+
+    if (centerX || centerY) {
+        // Comma
+        if (!isComma(a))
+            return false;
+
+        a = args->next();
+        if (!a)
+            return false;
+    }
+
+    result->setFirstX(toCSSPrimitiveValue(centerX.get()));
+    result->setSecondX(toCSSPrimitiveValue(centerX.get()));
+    // CSS3 radial gradients always share the same start and end point.
+    result->setFirstY(toCSSPrimitiveValue(centerY.get()));
+    result->setSecondY(toCSSPrimitiveValue(centerY.get()));
+
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> shapeValue;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> sizeValue;
+
+    // Optional shape and/or size in any order.
+    for (int i = 0; i < 2; ++i) {
+        if (a->unit != CSSPrimitiveValue::CSS_IDENT)
+            break;
+
+        bool foundValue = false;
+        switch (a->id) {
+        case CSSValueCircle:
+        case CSSValueEllipse:
+            shapeValue = cssValuePool().createIdentifierValue(a->id);
+            foundValue = true;
+            break;
+        case CSSValueClosestSide:
+        case CSSValueClosestCorner:
+        case CSSValueFarthestSide:
+        case CSSValueFarthestCorner:
+        case CSSValueContain:
+        case CSSValueCover:
+            sizeValue = cssValuePool().createIdentifierValue(a->id);
+            foundValue = true;
+            break;
+        default:
+            break;
+        }
+
+        if (foundValue) {
+            a = args->next();
+            if (!a)
+                return false;
+
+            expectComma = true;
+        }
+    }
+
+    result->setShape(shapeValue);
+    result->setSizingBehavior(sizeValue);
+
+    // Or, two lengths or percentages
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> horizontalSize;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> verticalSize;
+
+    if (!shapeValue && !sizeValue) {
+        if (validUnit(a, FLength | FPercent)) {
+            horizontalSize = createPrimitiveNumericValue(a);
+            a = args->next();
+            if (!a)
+                return false;
+
+            expectComma = true;
+        }
+
+        if (validUnit(a, FLength | FPercent)) {
+            verticalSize = createPrimitiveNumericValue(a);
+
+            a = args->next();
+            if (!a)
+                return false;
+            expectComma = true;
+        }
+    }
+
+    // Must have neither or both.
+    if (!horizontalSize != !verticalSize)
+        return false;
+
+    result->setEndHorizontalSize(horizontalSize);
+    result->setEndVerticalSize(verticalSize);
+
+    if (!parseGradientColorStops(args, result.get(), expectComma))
+        return false;
+
+    gradient = result.release();
+    return true;
+}
+
+bool CSSPropertyParser::parseLinearGradient(CSSParserValueList* valueList, RefPtrWillBeRawPtr<CSSValue>& gradient, CSSGradientRepeat repeating)
+{
+    RefPtrWillBeRawPtr<CSSLinearGradientValue> result = CSSLinearGradientValue::create(repeating, CSSLinearGradient);
+
+    CSSParserValueList* args = valueList->current()->function->args.get();
+    if (!args || !args->size())
+        return false;
+
+    CSSParserValue* a = args->current();
+    if (!a)
+        return false;
+
+    bool expectComma = false;
+    // Look for angle.
+    if (validUnit(a, FAngle, HTMLStandardMode)) {
+        result->setAngle(createPrimitiveNumericValue(a));
+
+        args->next();
+        expectComma = true;
+    } else if (a->unit == CSSPrimitiveValue::CSS_IDENT && equalIgnoringCase(a, "to")) {
+        // to [ [left | right] || [top | bottom] ]
+        a = args->next();
+        if (!a)
+            return false;
+
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> endX, endY;
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> location;
+        bool isHorizontal = false;
+
+        location = valueFromSideKeyword(a, isHorizontal);
+        if (!location)
+            return false;
+
+        if (isHorizontal)
+            endX = location;
+        else
+            endY = location;
+
+        a = args->next();
+        if (!a)
+            return false;
+
+        location = valueFromSideKeyword(a, isHorizontal);
+        if (location) {
+            if (isHorizontal) {
+                if (endX)
+                    return false;
+                endX = location;
+            } else {
+                if (endY)
+                    return false;
+                endY = location;
+            }
+
+            args->next();
+        }
+
+        expectComma = true;
+        result->setFirstX(endX.release());
+        result->setFirstY(endY.release());
+    }
+
+    if (!parseGradientColorStops(args, result.get(), expectComma))
+        return false;
+
+    if (!result->stopCount())
+        return false;
+
+    gradient = result.release();
+    return true;
+}
+
+bool CSSPropertyParser::parseRadialGradient(CSSParserValueList* valueList, RefPtrWillBeRawPtr<CSSValue>& gradient, CSSGradientRepeat repeating)
+{
+    RefPtrWillBeRawPtr<CSSRadialGradientValue> result = CSSRadialGradientValue::create(repeating, CSSRadialGradient);
+
+    CSSParserValueList* args = valueList->current()->function->args.get();
+    if (!args || !args->size())
+        return false;
+
+    CSSParserValue* a = args->current();
+    if (!a)
+        return false;
+
+    bool expectComma = false;
+
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> shapeValue;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> sizeValue;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> horizontalSize;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> verticalSize;
+
+    // First part of grammar, the size/shape clause:
+    // [ circle || <length> ] |
+    // [ ellipse || [ <length> | <percentage> ]{2} ] |
+    // [ [ circle | ellipse] || <size-keyword> ]
+    for (int i = 0; i < 3; ++i) {
+        if (a->unit == CSSPrimitiveValue::CSS_IDENT) {
+            bool badIdent = false;
+            switch (a->id) {
+            case CSSValueCircle:
+            case CSSValueEllipse:
+                if (shapeValue)
+                    return false;
+                shapeValue = cssValuePool().createIdentifierValue(a->id);
+                break;
+            case CSSValueClosestSide:
+            case CSSValueClosestCorner:
+            case CSSValueFarthestSide:
+            case CSSValueFarthestCorner:
+                if (sizeValue || horizontalSize)
+                    return false;
+                sizeValue = cssValuePool().createIdentifierValue(a->id);
+                break;
+            default:
+                badIdent = true;
+            }
+
+            if (badIdent)
+                break;
+
+            a = args->next();
+            if (!a)
+                return false;
+        } else if (validUnit(a, FLength | FPercent)) {
+
+            if (sizeValue || horizontalSize)
+                return false;
+            horizontalSize = createPrimitiveNumericValue(a);
+
+            a = args->next();
+            if (!a)
+                return false;
+
+            if (validUnit(a, FLength | FPercent)) {
+                verticalSize = createPrimitiveNumericValue(a);
+                ++i;
+                a = args->next();
+                if (!a)
+                    return false;
+            }
+        } else
+            break;
+    }
+
+    // You can specify size as a keyword or a length/percentage, not both.
+    if (sizeValue && horizontalSize)
+        return false;
+    // Circles must have 0 or 1 lengths.
+    if (shapeValue && shapeValue->getValueID() == CSSValueCircle && verticalSize)
+        return false;
+    // Ellipses must have 0 or 2 length/percentages.
+    if (shapeValue && shapeValue->getValueID() == CSSValueEllipse && horizontalSize && !verticalSize)
+        return false;
+    // If there's only one size, it must be a length.
+    if (!verticalSize && horizontalSize && horizontalSize->isPercentage())
+        return false;
+
+    result->setShape(shapeValue);
+    result->setSizingBehavior(sizeValue);
+    result->setEndHorizontalSize(horizontalSize);
+    result->setEndVerticalSize(verticalSize);
+
+    // Second part of grammar, the center-position clause:
+    // at <position>
+    RefPtrWillBeRawPtr<CSSValue> centerX;
+    RefPtrWillBeRawPtr<CSSValue> centerY;
+    if (a->unit == CSSPrimitiveValue::CSS_IDENT && equalIgnoringCase(a, "at")) {
+        a = args->next();
+        if (!a)
+            return false;
+
+        parseFillPosition(args, centerX, centerY);
+        if (!(centerX && centerY))
+            return false;
+
+        a = args->current();
+        if (!a)
+            return false;
+        result->setFirstX(toCSSPrimitiveValue(centerX.get()));
+        result->setFirstY(toCSSPrimitiveValue(centerY.get()));
+        // Right now, CSS radial gradients have the same start and end centers.
+        result->setSecondX(toCSSPrimitiveValue(centerX.get()));
+        result->setSecondY(toCSSPrimitiveValue(centerY.get()));
+    }
+
+    if (shapeValue || sizeValue || horizontalSize || centerX || centerY)
+        expectComma = true;
+
+    if (!parseGradientColorStops(args, result.get(), expectComma))
+        return false;
+
+    gradient = result.release();
+    return true;
+}
+
+bool CSSPropertyParser::parseGradientColorStops(CSSParserValueList* valueList, CSSGradientValue* gradient, bool expectComma)
+{
+    CSSParserValue* a = valueList->current();
+
+    // Now look for color stops.
+    while (a) {
+        // Look for the comma before the next stop.
+        if (expectComma) {
+            if (!isComma(a))
+                return false;
+
+            a = valueList->next();
+            if (!a)
+                return false;
+        }
+
+        // <color-stop> = <color> [ <percentage> | <length> ]?
+        CSSGradientColorStop stop;
+        stop.m_color = parseGradientColorOrKeyword(this, a);
+        if (!stop.m_color)
+            return false;
+
+        a = valueList->next();
+        if (a) {
+            if (validUnit(a, FLength | FPercent)) {
+                stop.m_position = createPrimitiveNumericValue(a);
+                a = valueList->next();
+            }
+        }
+
+        gradient->addStop(stop);
+        expectComma = true;
+    }
+
+    // Must have 2 or more stops to be valid.
+    return gradient->stopCount() >= 2;
+}
+
+bool CSSPropertyParser::parseGeneratedImage(CSSParserValueList* valueList, RefPtrWillBeRawPtr<CSSValue>& value)
+{
+    CSSParserValue* val = valueList->current();
+
+    if (val->unit != CSSParserValue::Function)
+        return false;
+
+    if (equalIgnoringCase(val->function->name, "-webkit-gradient(")) {
+        // FIXME: This should send a deprecation message.
+        if (m_context.useCounter())
+            m_context.useCounter()->count(UseCounter::DeprecatedWebKitGradient);
+        return parseDeprecatedGradient(valueList, value);
+    }
+
+    if (equalIgnoringCase(val->function->name, "-webkit-linear-gradient(")) {
+        // FIXME: This should send a deprecation message.
+        if (m_context.useCounter())
+            m_context.useCounter()->count(UseCounter::DeprecatedWebKitLinearGradient);
+        return parseDeprecatedLinearGradient(valueList, value, NonRepeating);
+    }
+
+    if (equalIgnoringCase(val->function->name, "linear-gradient("))
+        return parseLinearGradient(valueList, value, NonRepeating);
+
+    if (equalIgnoringCase(val->function->name, "-webkit-repeating-linear-gradient(")) {
+        // FIXME: This should send a deprecation message.
+        if (m_context.useCounter())
+            m_context.useCounter()->count(UseCounter::DeprecatedWebKitRepeatingLinearGradient);
+        return parseDeprecatedLinearGradient(valueList, value, Repeating);
+    }
+
+    if (equalIgnoringCase(val->function->name, "repeating-linear-gradient("))
+        return parseLinearGradient(valueList, value, Repeating);
+
+    if (equalIgnoringCase(val->function->name, "-webkit-radial-gradient(")) {
+        // FIXME: This should send a deprecation message.
+        if (m_context.useCounter())
+            m_context.useCounter()->count(UseCounter::DeprecatedWebKitRadialGradient);
+        return parseDeprecatedRadialGradient(valueList, value, NonRepeating);
+    }
+
+    if (equalIgnoringCase(val->function->name, "radial-gradient("))
+        return parseRadialGradient(valueList, value, NonRepeating);
+
+    if (equalIgnoringCase(val->function->name, "-webkit-repeating-radial-gradient(")) {
+        if (m_context.useCounter())
+            m_context.useCounter()->count(UseCounter::DeprecatedWebKitRepeatingRadialGradient);
+        return parseDeprecatedRadialGradient(valueList, value, Repeating);
+    }
+
+    if (equalIgnoringCase(val->function->name, "repeating-radial-gradient("))
+        return parseRadialGradient(valueList, value, Repeating);
+
+    if (equalIgnoringCase(val->function->name, "-webkit-canvas("))
+        return parseCanvas(valueList, value);
+
+    if (equalIgnoringCase(val->function->name, "-webkit-cross-fade("))
+        return parseCrossfade(valueList, value);
+
+    return false;
+}
+
+bool CSSPropertyParser::parseCrossfade(CSSParserValueList* valueList, RefPtrWillBeRawPtr<CSSValue>& crossfade)
+{
+    // Walk the arguments.
+    CSSParserValueList* args = valueList->current()->function->args.get();
+    if (!args || args->size() != 5)
+        return false;
+    CSSParserValue* a = args->current();
+    RefPtrWillBeRawPtr<CSSValue> fromImageValue;
+    RefPtrWillBeRawPtr<CSSValue> toImageValue;
+
+    // The first argument is the "from" image. It is a fill image.
+    if (!a || !parseFillImage(args, fromImageValue))
+        return false;
+    a = args->next();
+
+    // Skip a comma
+    if (!isComma(a))
+        return false;
+    a = args->next();
+
+    // The second argument is the "to" image. It is a fill image.
+    if (!a || !parseFillImage(args, toImageValue))
+        return false;
+    a = args->next();
+
+    // Skip a comma
+    if (!isComma(a))
+        return false;
+    a = args->next();
+
+    // The third argument is the crossfade value. It is a percentage or a fractional number.
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> percentage;
+    if (!a)
+        return false;
+
+    if (a->unit == CSSPrimitiveValue::CSS_PERCENTAGE)
+        percentage = cssValuePool().createValue(clampTo<double>(a->fValue / 100, 0, 1), CSSPrimitiveValue::CSS_NUMBER);
+    else if (a->unit == CSSPrimitiveValue::CSS_NUMBER)
+        percentage = cssValuePool().createValue(clampTo<double>(a->fValue, 0, 1), CSSPrimitiveValue::CSS_NUMBER);
+    else
+        return false;
+
+    RefPtrWillBeRawPtr<CSSCrossfadeValue> result = CSSCrossfadeValue::create(fromImageValue, toImageValue);
+    result->setPercentage(percentage);
+
+    crossfade = result;
+
+    return true;
+}
+
+bool CSSPropertyParser::parseCanvas(CSSParserValueList* valueList, RefPtrWillBeRawPtr<CSSValue>& canvas)
+{
+    // Walk the arguments.
+    CSSParserValueList* args = valueList->current()->function->args.get();
+    if (!args || args->size() != 1)
+        return false;
+
+    // The first argument is the canvas name.  It is an identifier.
+    CSSParserValue* value = args->current();
+    if (!value || value->unit != CSSPrimitiveValue::CSS_IDENT)
+        return false;
+
+    canvas = CSSCanvasValue::create(value->string);
+    return true;
+}
+
+PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseImageSet(CSSParserValueList* valueList)
+{
+    CSSParserValue* function = valueList->current();
+
+    if (function->unit != CSSParserValue::Function)
+        return nullptr;
+
+    CSSParserValueList* functionArgs = valueList->current()->function->args.get();
+    if (!functionArgs || !functionArgs->size() || !functionArgs->current())
+        return nullptr;
+
+    RefPtrWillBeRawPtr<CSSImageSetValue> imageSet = CSSImageSetValue::create();
+
+    CSSParserValue* arg = functionArgs->current();
+    while (arg) {
+        if (arg->unit != CSSPrimitiveValue::CSS_URI)
+            return nullptr;
+
+        RefPtrWillBeRawPtr<CSSImageValue> image = CSSImageValue::create(arg->string, completeURL(arg->string));
+        imageSet->append(image);
+
+        arg = functionArgs->next();
+        if (!arg || arg->unit != CSSPrimitiveValue::CSS_DIMENSION)
+            return nullptr;
+
+        double imageScaleFactor = 0;
+        const String& string = arg->string;
+        unsigned length = string.length();
+        if (!length)
+            return nullptr;
+        if (string.is8Bit()) {
+            const LChar* start = string.characters8();
+            parseDouble(start, start + length, 'x', imageScaleFactor);
+        } else {
+            const UChar* start = string.characters16();
+            parseDouble(start, start + length, 'x', imageScaleFactor);
+        }
+        if (imageScaleFactor <= 0)
+            return nullptr;
+        imageSet->append(cssValuePool().createValue(imageScaleFactor, CSSPrimitiveValue::CSS_NUMBER));
+
+        // If there are no more arguments, we're done.
+        arg = functionArgs->next();
+        if (!arg)
+            break;
+
+        // If there are more arguments, they should be after a comma.
+        if (!isComma(arg))
+            return nullptr;
+
+        // Skip the comma and move on to the next argument.
+        arg = functionArgs->next();
+    }
+
+    return imageSet.release();
+}
+
+bool CSSPropertyParser::parseWillChange(bool important)
+{
+    ASSERT(RuntimeEnabledFeatures::cssWillChangeEnabled());
+
+    RefPtrWillBeRawPtr<CSSValueList> values = CSSValueList::createCommaSeparated();
+    if (m_valueList->current()->id == CSSValueAuto) {
+        if (m_valueList->next())
+            return false;
+    }
+
+    CSSParserValue* currentValue;
+    bool expectComma = false;
+
+    // Every comma-separated list of CSS_IDENTs is a valid will-change value,
+    // unless the list includes an explicitly disallowed CSS_IDENT.
+    while ((currentValue = m_valueList->current())) {
+        if (expectComma) {
+            if (!isComma(currentValue))
+                return false;
+            expectComma = false;
+            m_valueList->next();
+            continue;
+        }
+
+        if (currentValue->unit != CSSPrimitiveValue::CSS_IDENT)
+            return false;
+
+        if (CSSPropertyID property = cssPropertyID(currentValue->string)) {
+            if (property == CSSPropertyWillChange)
+                return false;
+            values->append(cssValuePool().createIdentifierValue(property));
+        } else {
+            switch (currentValue->id) {
+            case CSSValueNone:
+            case CSSValueAll:
+            case CSSValueAuto:
+            case CSSValueDefault:
+            case CSSValueInitial:
+            case CSSValueInherit:
+                return false;
+            case CSSValueContents:
+            case CSSValueScrollPosition:
+                values->append(cssValuePool().createIdentifierValue(currentValue->id));
+                break;
+            default:
+                break;
+            }
+        }
+        expectComma = true;
+        m_valueList->next();
+    }
+
+    addProperty(CSSPropertyWillChange, values.release(), important);
+    return true;
+}
+
+bool CSSPropertyParser::isBlendMode(CSSValueID valueID)
+{
+    return (valueID >= CSSValueMultiply && valueID <= CSSValueLuminosity)
+        || valueID == CSSValueNormal
+        || valueID == CSSValueOverlay;
+}
+
+bool CSSPropertyParser::isCompositeOperator(CSSValueID valueID)
+{
+    // FIXME: Add CSSValueDestination and CSSValueLighter when the Compositing spec updates.
+    return valueID >= CSSValueClear && valueID <= CSSValueXor;
+}
+
+static void filterInfoForName(const CSSParserString& name, CSSFilterValue::FilterOperationType& filterType, unsigned& maximumArgumentCount)
+{
+    if (equalIgnoringCase(name, "grayscale("))
+        filterType = CSSFilterValue::GrayscaleFilterOperation;
+    else if (equalIgnoringCase(name, "sepia("))
+        filterType = CSSFilterValue::SepiaFilterOperation;
+    else if (equalIgnoringCase(name, "saturate("))
+        filterType = CSSFilterValue::SaturateFilterOperation;
+    else if (equalIgnoringCase(name, "hue-rotate("))
+        filterType = CSSFilterValue::HueRotateFilterOperation;
+    else if (equalIgnoringCase(name, "invert("))
+        filterType = CSSFilterValue::InvertFilterOperation;
+    else if (equalIgnoringCase(name, "opacity("))
+        filterType = CSSFilterValue::OpacityFilterOperation;
+    else if (equalIgnoringCase(name, "brightness("))
+        filterType = CSSFilterValue::BrightnessFilterOperation;
+    else if (equalIgnoringCase(name, "contrast("))
+        filterType = CSSFilterValue::ContrastFilterOperation;
+    else if (equalIgnoringCase(name, "blur("))
+        filterType = CSSFilterValue::BlurFilterOperation;
+    else if (equalIgnoringCase(name, "drop-shadow(")) {
+        filterType = CSSFilterValue::DropShadowFilterOperation;
+        maximumArgumentCount = 4;  // x-offset, y-offset, blur-radius, color -- spread and inset style not allowed.
+    }
+}
+
+PassRefPtrWillBeRawPtr<CSSFilterValue> CSSPropertyParser::parseBuiltinFilterArguments(CSSParserValueList* args, CSSFilterValue::FilterOperationType filterType)
+{
+    RefPtrWillBeRawPtr<CSSFilterValue> filterValue = CSSFilterValue::create(filterType);
+    ASSERT(args);
+
+    switch (filterType) {
+    case CSSFilterValue::GrayscaleFilterOperation:
+    case CSSFilterValue::SepiaFilterOperation:
+    case CSSFilterValue::SaturateFilterOperation:
+    case CSSFilterValue::InvertFilterOperation:
+    case CSSFilterValue::OpacityFilterOperation:
+    case CSSFilterValue::ContrastFilterOperation: {
+        // One optional argument, 0-1 or 0%-100%, if missing use 100%.
+        if (args->size() > 1)
+            return nullptr;
+
+        if (args->size()) {
+            CSSParserValue* value = args->current();
+            if (!validUnit(value, FNumber | FPercent | FNonNeg, HTMLStandardMode))
+                return nullptr;
+
+            double amount = value->fValue;
+
+            // Saturate and Contrast allow values over 100%.
+            if (filterType != CSSFilterValue::SaturateFilterOperation
+                && filterType != CSSFilterValue::ContrastFilterOperation) {
+                double maxAllowed = value->unit == CSSPrimitiveValue::CSS_PERCENTAGE ? 100.0 : 1.0;
+                if (amount > maxAllowed)
+                    return nullptr;
+            }
+
+            filterValue->append(cssValuePool().createValue(amount, static_cast<CSSPrimitiveValue::UnitTypes>(value->unit)));
+        }
+        break;
+    }
+    case CSSFilterValue::BrightnessFilterOperation: {
+        // One optional argument, if missing use 100%.
+        if (args->size() > 1)
+            return nullptr;
+
+        if (args->size()) {
+            CSSParserValue* value = args->current();
+            if (!validUnit(value, FNumber | FPercent, HTMLStandardMode))
+                return nullptr;
+
+            filterValue->append(cssValuePool().createValue(value->fValue, static_cast<CSSPrimitiveValue::UnitTypes>(value->unit)));
+        }
+        break;
+    }
+    case CSSFilterValue::HueRotateFilterOperation: {
+        // hue-rotate() takes one optional angle.
+        if (args->size() > 1)
+            return nullptr;
+
+        if (args->size()) {
+            CSSParserValue* argument = args->current();
+            if (!validUnit(argument, FAngle, HTMLStandardMode))
+                return nullptr;
+
+            filterValue->append(createPrimitiveNumericValue(argument));
+        }
+        break;
+    }
+    case CSSFilterValue::BlurFilterOperation: {
+        // Blur takes a single length. Zero parameters are allowed.
+        if (args->size() > 1)
+            return nullptr;
+
+        if (args->size()) {
+            CSSParserValue* argument = args->current();
+            if (!validUnit(argument, FLength | FNonNeg, HTMLStandardMode))
+                return nullptr;
+
+            filterValue->append(createPrimitiveNumericValue(argument));
+        }
+        break;
+    }
+    case CSSFilterValue::DropShadowFilterOperation: {
+        // drop-shadow() takes a single shadow.
+        RefPtrWillBeRawPtr<CSSValueList> shadowValueList = parseShadow(args, CSSPropertyWebkitFilter);
+        if (!shadowValueList || shadowValueList->length() != 1)
+            return nullptr;
+
+        filterValue->append((shadowValueList.release())->itemWithoutBoundsCheck(0));
+        break;
+    }
+    default:
+        ASSERT_NOT_REACHED();
+    }
+    return filterValue.release();
+}
+
+PassRefPtrWillBeRawPtr<CSSValueList> CSSPropertyParser::parseFilter()
+{
+    if (!m_valueList)
+        return nullptr;
+
+    // The filter is a list of functional primitives that specify individual operations.
+    RefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
+    for (CSSParserValue* value = m_valueList->current(); value; value = m_valueList->next()) {
+        if (value->unit != CSSPrimitiveValue::CSS_URI && (value->unit != CSSParserValue::Function || !value->function))
+            return nullptr;
+
+        CSSFilterValue::FilterOperationType filterType = CSSFilterValue::UnknownFilterOperation;
+
+        // See if the specified primitive is one we understand.
+        if (value->unit == CSSPrimitiveValue::CSS_URI) {
+            RefPtrWillBeRawPtr<CSSFilterValue> referenceFilterValue = CSSFilterValue::create(CSSFilterValue::ReferenceFilterOperation);
+            list->append(referenceFilterValue);
+            referenceFilterValue->append(CSSSVGDocumentValue::create(value->string));
+        } else {
+            const CSSParserString name = value->function->name;
+            unsigned maximumArgumentCount = 1;
+
+            filterInfoForName(name, filterType, maximumArgumentCount);
+
+            if (filterType == CSSFilterValue::UnknownFilterOperation)
+                return nullptr;
+
+            CSSParserValueList* args = value->function->args.get();
+            if (!args)
+                return nullptr;
+
+            RefPtrWillBeRawPtr<CSSFilterValue> filterValue = parseBuiltinFilterArguments(args, filterType);
+            if (!filterValue)
+                return nullptr;
+
+            list->append(filterValue);
+        }
+    }
+
+    return list.release();
+}
+
+bool CSSPropertyParser::parseTransformOrigin(CSSPropertyID propId, CSSPropertyID& propId1, CSSPropertyID& propId2, CSSPropertyID& propId3, RefPtrWillBeRawPtr<CSSValue>& value, RefPtrWillBeRawPtr<CSSValue>& value2, RefPtrWillBeRawPtr<CSSValue>& value3)
+{
+    propId1 = propId;
+    propId2 = propId;
+    propId3 = propId;
+    if (propId == CSSPropertyWebkitTransformOrigin) {
+        propId1 = CSSPropertyWebkitTransformOriginX;
+        propId2 = CSSPropertyWebkitTransformOriginY;
+        propId3 = CSSPropertyWebkitTransformOriginZ;
+    }
+
+    switch (propId) {
+        case CSSPropertyWebkitTransformOrigin:
+            if (!parseTransformOriginShorthand(value, value2, value3))
+                return false;
+            // parseTransformOriginShorthand advances the m_valueList pointer
+            break;
+        case CSSPropertyWebkitTransformOriginX: {
+            value = parseFillPositionX(m_valueList.get());
+            if (value)
+                m_valueList->next();
+            break;
+        }
+        case CSSPropertyWebkitTransformOriginY: {
+            value = parseFillPositionY(m_valueList.get());
+            if (value)
+                m_valueList->next();
+            break;
+        }
+        case CSSPropertyWebkitTransformOriginZ: {
+            if (validUnit(m_valueList->current(), FLength))
+                value = createPrimitiveNumericValue(m_valueList->current());
+            if (value)
+                m_valueList->next();
+            break;
+        }
+        default:
+            ASSERT_NOT_REACHED();
+            return false;
+    }
+
+    return value;
+}
+
+bool CSSPropertyParser::parsePerspectiveOrigin(CSSPropertyID propId, CSSPropertyID& propId1, CSSPropertyID& propId2, RefPtrWillBeRawPtr<CSSValue>& value, RefPtrWillBeRawPtr<CSSValue>& value2)
+{
+    propId1 = propId;
+    propId2 = propId;
+    if (propId == CSSPropertyWebkitPerspectiveOrigin) {
+        propId1 = CSSPropertyWebkitPerspectiveOriginX;
+        propId2 = CSSPropertyWebkitPerspectiveOriginY;
+    }
+
+    switch (propId) {
+        case CSSPropertyWebkitPerspectiveOrigin:
+            if (m_valueList->size() > 2)
+                return false;
+            parse2ValuesFillPosition(m_valueList.get(), value, value2);
+            break;
+        case CSSPropertyWebkitPerspectiveOriginX: {
+            value = parseFillPositionX(m_valueList.get());
+            if (value)
+                m_valueList->next();
+            break;
+        }
+        case CSSPropertyWebkitPerspectiveOriginY: {
+            value = parseFillPositionY(m_valueList.get());
+            if (value)
+                m_valueList->next();
+            break;
+        }
+        default:
+            ASSERT_NOT_REACHED();
+            return false;
+    }
+
+    return value;
+}
+
+bool CSSPropertyParser::parseTouchAction(bool important)
+{
+    if (!RuntimeEnabledFeatures::cssTouchActionEnabled())
+        return false;
+
+    CSSParserValue* value = m_valueList->current();
+    RefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
+    if (m_valueList->size() == 1 && value && (value->id == CSSValueAuto || value->id == CSSValueNone)) {
+        list->append(cssValuePool().createIdentifierValue(value->id));
+        addProperty(CSSPropertyTouchAction, list.release(), important);
+        m_valueList->next();
+        return true;
+    }
+
+    bool isValid = true;
+    while (isValid && value) {
+        switch (value->id) {
+        case CSSValuePanX:
+        case CSSValuePanY: {
+            RefPtrWillBeRawPtr<CSSValue> panValue = cssValuePool().createIdentifierValue(value->id);
+            if (list->hasValue(panValue.get())) {
+                isValid = false;
+                break;
+            }
+            list->append(panValue.release());
+            break;
+        }
+        default:
+            isValid = false;
+            break;
+        }
+        if (isValid)
+            value = m_valueList->next();
+    }
+
+    if (list->length() && isValid) {
+        addProperty(CSSPropertyTouchAction, list.release(), important);
+        return true;
+    }
+
+    return false;
+}
+
+void CSSPropertyParser::addTextDecorationProperty(CSSPropertyID propId, PassRefPtrWillBeRawPtr<CSSValue> value, bool important)
+{
+    // The text-decoration-line property takes priority over text-decoration, unless the latter has important priority set.
+    if (propId == CSSPropertyTextDecoration && !important && !inShorthand()) {
+        for (unsigned i = 0; i < m_parsedProperties.size(); ++i) {
+            if (m_parsedProperties[i].id() == CSSPropertyTextDecorationLine)
+                return;
+        }
+    }
+    addProperty(propId, value, important);
+}
+
+bool CSSPropertyParser::parseTextDecoration(CSSPropertyID propId, bool important)
+{
+    if (propId == CSSPropertyTextDecorationLine
+        && !RuntimeEnabledFeatures::css3TextDecorationsEnabled())
+        return false;
+
+    CSSParserValue* value = m_valueList->current();
+    if (value && value->id == CSSValueNone) {
+        addTextDecorationProperty(propId, cssValuePool().createIdentifierValue(CSSValueNone), important);
+        m_valueList->next();
+        return true;
+    }
+
+    RefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
+    bool isValid = true;
+    while (isValid && value) {
+        switch (value->id) {
+        case CSSValueUnderline:
+        case CSSValueOverline:
+        case CSSValueLineThrough:
+        case CSSValueBlink:
+            list->append(cssValuePool().createIdentifierValue(value->id));
+            break;
+        default:
+            isValid = false;
+            break;
+        }
+        if (isValid)
+            value = m_valueList->next();
+    }
+
+    // Values are either valid or in shorthand scope.
+    if (list->length() && (isValid || inShorthand())) {
+        addTextDecorationProperty(propId, list.release(), important);
+        return true;
+    }
+
+    return false;
+}
+
+bool CSSPropertyParser::parseTextUnderlinePosition(bool important)
+{
+    // The text-underline-position property has syntax "auto | [ under || [ left | right ] ]".
+    // However, values 'left' and 'right' are not implemented yet, so we will parse syntax
+    // "auto | under" for now.
+    CSSParserValue* value = m_valueList->current();
+    switch (value->id) {
+    case CSSValueAuto:
+    case CSSValueUnder:
+        if (m_valueList->next())
+            return false;
+        addProperty(CSSPropertyTextUnderlinePosition, cssValuePool().createIdentifierValue(value->id), important);
+        return true;
+    default:
+        return false;
+    }
+}
+
+bool CSSPropertyParser::parseTextEmphasisStyle(bool important)
+{
+    unsigned valueListSize = m_valueList->size();
+
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> fill;
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> shape;
+
+    for (CSSParserValue* value = m_valueList->current(); value; value = m_valueList->next()) {
+        if (value->unit == CSSPrimitiveValue::CSS_STRING) {
+            if (fill || shape || (valueListSize != 1 && !inShorthand()))
+                return false;
+            addProperty(CSSPropertyWebkitTextEmphasisStyle, createPrimitiveStringValue(value), important);
+            m_valueList->next();
+            return true;
+        }
+
+        if (value->id == CSSValueNone) {
+            if (fill || shape || (valueListSize != 1 && !inShorthand()))
+                return false;
+            addProperty(CSSPropertyWebkitTextEmphasisStyle, cssValuePool().createIdentifierValue(CSSValueNone), important);
+            m_valueList->next();
+            return true;
+        }
+
+        if (value->id == CSSValueOpen || value->id == CSSValueFilled) {
+            if (fill)
+                return false;
+            fill = cssValuePool().createIdentifierValue(value->id);
+        } else if (value->id == CSSValueDot || value->id == CSSValueCircle || value->id == CSSValueDoubleCircle || value->id == CSSValueTriangle || value->id == CSSValueSesame) {
+            if (shape)
+                return false;
+            shape = cssValuePool().createIdentifierValue(value->id);
+        } else if (!inShorthand())
+            return false;
+        else
+            break;
+    }
+
+    if (fill && shape) {
+        RefPtrWillBeRawPtr<CSSValueList> parsedValues = CSSValueList::createSpaceSeparated();
+        parsedValues->append(fill.release());
+        parsedValues->append(shape.release());
+        addProperty(CSSPropertyWebkitTextEmphasisStyle, parsedValues.release(), important);
+        return true;
+    }
+    if (fill) {
+        addProperty(CSSPropertyWebkitTextEmphasisStyle, fill.release(), important);
+        return true;
+    }
+    if (shape) {
+        addProperty(CSSPropertyWebkitTextEmphasisStyle, shape.release(), important);
+        return true;
+    }
+
+    return false;
+}
+
+PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseTextIndent()
+{
+    RefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
+
+    // <length> | <percentage> | inherit
+    if (m_valueList->size() == 1) {
+        CSSParserValue* value = m_valueList->current();
+        if (!value->id && validUnit(value, FLength | FPercent)) {
+            list->append(createPrimitiveNumericValue(value));
+            m_valueList->next();
+            return list.release();
+        }
+    }
+
+    if (!RuntimeEnabledFeatures::css3TextEnabled())
+        return nullptr;
+
+    // The case where text-indent has only <length>(or <percentage>) value
+    // is handled above if statement even though css3TextEnabled() returns true.
+
+    // [ [ <length> | <percentage> ] && each-line ] | inherit
+    if (m_valueList->size() != 2)
+        return nullptr;
+
+    CSSParserValue* firstValue = m_valueList->current();
+    CSSParserValue* secondValue = m_valueList->next();
+    CSSParserValue* lengthOrPercentageValue = 0;
+
+    // [ <length> | <percentage> ] each-line
+    if (validUnit(firstValue, FLength | FPercent) && secondValue->id == CSSValueEachLine)
+        lengthOrPercentageValue = firstValue;
+    // each-line [ <length> | <percentage> ]
+    else if (firstValue->id == CSSValueEachLine && validUnit(secondValue, FLength | FPercent))
+        lengthOrPercentageValue = secondValue;
+
+    if (lengthOrPercentageValue) {
+        list->append(createPrimitiveNumericValue(lengthOrPercentageValue));
+        list->append(cssValuePool().createIdentifierValue(CSSValueEachLine));
+        m_valueList->next();
+        return list.release();
+    }
+
+    return nullptr;
+}
+
+bool CSSPropertyParser::parseLineBoxContain(bool important)
+{
+    LineBoxContain lineBoxContain = LineBoxContainNone;
+
+    for (CSSParserValue* value = m_valueList->current(); value; value = m_valueList->next()) {
+        if (value->id == CSSValueBlock) {
+            if (lineBoxContain & LineBoxContainBlock)
+                return false;
+            lineBoxContain |= LineBoxContainBlock;
+        } else if (value->id == CSSValueInline) {
+            if (lineBoxContain & LineBoxContainInline)
+                return false;
+            lineBoxContain |= LineBoxContainInline;
+        } else if (value->id == CSSValueFont) {
+            if (lineBoxContain & LineBoxContainFont)
+                return false;
+            lineBoxContain |= LineBoxContainFont;
+        } else if (value->id == CSSValueGlyphs) {
+            if (lineBoxContain & LineBoxContainGlyphs)
+                return false;
+            lineBoxContain |= LineBoxContainGlyphs;
+        } else if (value->id == CSSValueReplaced) {
+            if (lineBoxContain & LineBoxContainReplaced)
+                return false;
+            lineBoxContain |= LineBoxContainReplaced;
+        } else if (value->id == CSSValueInlineBox) {
+            if (lineBoxContain & LineBoxContainInlineBox)
+                return false;
+            lineBoxContain |= LineBoxContainInlineBox;
+        } else
+            return false;
+    }
+
+    if (!lineBoxContain)
+        return false;
+
+    addProperty(CSSPropertyWebkitLineBoxContain, CSSLineBoxContainValue::create(lineBoxContain), important);
+    return true;
+}
+
+bool CSSPropertyParser::parseFontFeatureTag(CSSValueList* settings)
+{
+    // Feature tag name consists of 4-letter characters.
+    static const unsigned tagNameLength = 4;
+
+    CSSParserValue* value = m_valueList->current();
+    // Feature tag name comes first
+    if (value->unit != CSSPrimitiveValue::CSS_STRING)
+        return false;
+    if (value->string.length() != tagNameLength)
+        return false;
+    for (unsigned i = 0; i < tagNameLength; ++i) {
+        // Limits the range of characters to 0x20-0x7E, following the tag name rules defiend in the OpenType specification.
+        UChar character = value->string[i];
+        if (character < 0x20 || character > 0x7E)
+            return false;
+    }
+
+    AtomicString tag = value->string;
+    int tagValue = 1;
+    // Feature tag values could follow: <integer> | on | off
+    value = m_valueList->next();
+    if (value) {
+        if (value->unit == CSSPrimitiveValue::CSS_NUMBER && value->isInt && value->fValue >= 0) {
+            tagValue = clampToInteger(value->fValue);
+            if (tagValue < 0)
+                return false;
+            m_valueList->next();
+        } else if (value->id == CSSValueOn || value->id == CSSValueOff) {
+            tagValue = value->id == CSSValueOn;
+            m_valueList->next();
+        }
+    }
+    settings->append(CSSFontFeatureValue::create(tag, tagValue));
+    return true;
+}
+
+bool CSSPropertyParser::parseFontFeatureSettings(bool important)
+{
+    if (m_valueList->size() == 1 && m_valueList->current()->id == CSSValueNormal) {
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> normalValue = cssValuePool().createIdentifierValue(CSSValueNormal);
+        m_valueList->next();
+        addProperty(CSSPropertyWebkitFontFeatureSettings, normalValue.release(), important);
+        return true;
+    }
+
+    RefPtrWillBeRawPtr<CSSValueList> settings = CSSValueList::createCommaSeparated();
+    for (CSSParserValue* value = m_valueList->current(); value; value = m_valueList->next()) {
+        if (!parseFontFeatureTag(settings.get()))
+            return false;
+
+        // If the list isn't parsed fully, the current value should be comma.
+        value = m_valueList->current();
+        if (value && !isComma(value))
+            return false;
+    }
+    if (settings->length()) {
+        addProperty(CSSPropertyWebkitFontFeatureSettings, settings.release(), important);
+        return true;
+    }
+    return false;
+}
+
+bool CSSPropertyParser::parseFontVariantLigatures(bool important)
+{
+    RefPtrWillBeRawPtr<CSSValueList> ligatureValues = CSSValueList::createSpaceSeparated();
+    bool sawCommonLigaturesValue = false;
+    bool sawDiscretionaryLigaturesValue = false;
+    bool sawHistoricalLigaturesValue = false;
+
+    for (CSSParserValue* value = m_valueList->current(); value; value = m_valueList->next()) {
+        if (value->unit != CSSPrimitiveValue::CSS_IDENT)
+            return false;
+
+        switch (value->id) {
+        case CSSValueNoCommonLigatures:
+        case CSSValueCommonLigatures:
+            if (sawCommonLigaturesValue)
+                return false;
+            sawCommonLigaturesValue = true;
+            ligatureValues->append(cssValuePool().createIdentifierValue(value->id));
+            break;
+        case CSSValueNoDiscretionaryLigatures:
+        case CSSValueDiscretionaryLigatures:
+            if (sawDiscretionaryLigaturesValue)
+                return false;
+            sawDiscretionaryLigaturesValue = true;
+            ligatureValues->append(cssValuePool().createIdentifierValue(value->id));
+            break;
+        case CSSValueNoHistoricalLigatures:
+        case CSSValueHistoricalLigatures:
+            if (sawHistoricalLigaturesValue)
+                return false;
+            sawHistoricalLigaturesValue = true;
+            ligatureValues->append(cssValuePool().createIdentifierValue(value->id));
+            break;
+        default:
+            return false;
+        }
+    }
+
+    if (!ligatureValues->length())
+        return false;
+
+    addProperty(CSSPropertyFontVariantLigatures, ligatureValues.release(), important);
+    return true;
+}
+
+bool CSSPropertyParser::parseCalculation(CSSParserValue* value, ValueRange range)
+{
+    ASSERT(isCalculation(value));
+
+    CSSParserValueList* args = value->function->args.get();
+    if (!args || !args->size())
+        return false;
+
+    ASSERT(!m_parsedCalculation);
+    m_parsedCalculation = CSSCalcValue::create(value->function->name, args, range);
+
+    if (!m_parsedCalculation)
+        return false;
+
+    return true;
+}
+
+bool CSSPropertyParser::parseViewportProperty(CSSPropertyID propId, bool important)
+{
+    ASSERT(RuntimeEnabledFeatures::cssViewportEnabled() || isUASheetBehavior(m_context.mode()));
+
+    CSSParserValue* value = m_valueList->current();
+    if (!value)
+        return false;
+
+    CSSValueID id = value->id;
+    bool validPrimitive = false;
+
+    switch (propId) {
+    case CSSPropertyMinWidth: // auto | extend-to-zoom | <length> | <percentage>
+    case CSSPropertyMaxWidth:
+    case CSSPropertyMinHeight:
+    case CSSPropertyMaxHeight:
+        if (id == CSSValueAuto || id == CSSValueInternalExtendToZoom)
+            validPrimitive = true;
+        else
+            validPrimitive = (!id && validUnit(value, FLength | FPercent | FNonNeg));
+        break;
+    case CSSPropertyWidth: // shorthand
+        return parseViewportShorthand(propId, CSSPropertyMinWidth, CSSPropertyMaxWidth, important);
+    case CSSPropertyHeight:
+        return parseViewportShorthand(propId, CSSPropertyMinHeight, CSSPropertyMaxHeight, important);
+    case CSSPropertyMinZoom: // auto | <number> | <percentage>
+    case CSSPropertyMaxZoom:
+    case CSSPropertyZoom:
+        if (id == CSSValueAuto)
+            validPrimitive = true;
+        else
+            validPrimitive = (!id && validUnit(value, FNumber | FPercent | FNonNeg));
+        break;
+    case CSSPropertyUserZoom: // zoom | fixed
+        if (id == CSSValueZoom || id == CSSValueFixed)
+            validPrimitive = true;
+        break;
+    case CSSPropertyOrientation: // auto | portrait | landscape
+        if (id == CSSValueAuto || id == CSSValuePortrait || id == CSSValueLandscape)
+            validPrimitive = true;
+    default:
+        break;
+    }
+
+    RefPtrWillBeRawPtr<CSSValue> parsedValue;
+    if (validPrimitive) {
+        parsedValue = parseValidPrimitive(id, value);
+        m_valueList->next();
+    }
+
+    if (parsedValue) {
+        if (!m_valueList->current() || inShorthand()) {
+            addProperty(propId, parsedValue.release(), important);
+            return true;
+        }
+    }
+
+    return false;
+}
+
+bool CSSPropertyParser::parseViewportShorthand(CSSPropertyID propId, CSSPropertyID first, CSSPropertyID second, bool important)
+{
+    ASSERT(RuntimeEnabledFeatures::cssViewportEnabled() || isUASheetBehavior(m_context.mode()));
+    unsigned numValues = m_valueList->size();
+
+    if (numValues > 2)
+        return false;
+
+    ShorthandScope scope(this, propId);
+
+    if (!parseViewportProperty(first, important))
+        return false;
+
+    // If just one value is supplied, the second value
+    // is implicitly initialized with the first value.
+    if (numValues == 1)
+        m_valueList->previous();
+
+    return parseViewportProperty(second, important);
+}
+
+template <typename CharacterType>
+static CSSPropertyID cssPropertyID(const CharacterType* propertyName, unsigned length)
+{
+    char buffer[maxCSSPropertyNameLength + 1]; // 1 for null character
+
+    for (unsigned i = 0; i != length; ++i) {
+        CharacterType c = propertyName[i];
+        if (c == 0 || c >= 0x7F)
+            return CSSPropertyInvalid; // illegal character
+        buffer[i] = toASCIILower(c);
+    }
+    buffer[length] = '\0';
+
+    const char* name = buffer;
+    const Property* hashTableEntry = findProperty(name, length);
+    return hashTableEntry ? static_cast<CSSPropertyID>(hashTableEntry->id) : CSSPropertyInvalid;
+}
+
+CSSPropertyID cssPropertyID(const String& string)
+{
+    unsigned length = string.length();
+
+    if (!length)
+        return CSSPropertyInvalid;
+    if (length > maxCSSPropertyNameLength)
+        return CSSPropertyInvalid;
+
+    return string.is8Bit() ? cssPropertyID(string.characters8(), length) : cssPropertyID(string.characters16(), length);
+}
+
+CSSPropertyID cssPropertyID(const CSSParserString& string)
+{
+    unsigned length = string.length();
+
+    if (!length)
+        return CSSPropertyInvalid;
+    if (length > maxCSSPropertyNameLength)
+        return CSSPropertyInvalid;
+
+    return string.is8Bit() ? cssPropertyID(string.characters8(), length) : cssPropertyID(string.characters16(), length);
+}
+
+template <typename CharacterType>
+static CSSValueID cssValueKeywordID(const CharacterType* valueKeyword, unsigned length)
+{
+    char buffer[maxCSSValueKeywordLength + 1]; // 1 for null character
+
+    for (unsigned i = 0; i != length; ++i) {
+        CharacterType c = valueKeyword[i];
+        if (c == 0 || c >= 0x7F)
+            return CSSValueInvalid; // illegal character
+        buffer[i] = WTF::toASCIILower(c);
+    }
+    buffer[length] = '\0';
+
+    const Value* hashTableEntry = findValue(buffer, length);
+    return hashTableEntry ? static_cast<CSSValueID>(hashTableEntry->id) : CSSValueInvalid;
+}
+
+CSSValueID cssValueKeywordID(const CSSParserString& string)
+{
+    unsigned length = string.length();
+    if (!length)
+        return CSSValueInvalid;
+    if (length > maxCSSValueKeywordLength)
+        return CSSValueInvalid;
+
+    return string.is8Bit() ? cssValueKeywordID(string.characters8(), length) : cssValueKeywordID(string.characters16(), length);
+}
+
+bool isValidNthToken(const CSSParserString& token)
+{
+    // The tokenizer checks for the construct of an+b.
+    // However, since the {ident} rule precedes the {nth} rule, some of those
+    // tokens are identified as string literal. Furthermore we need to accept
+    // "odd" and "even" which does not match to an+b.
+    return equalIgnoringCase(token, "odd") || equalIgnoringCase(token, "even")
+        || equalIgnoringCase(token, "n") || equalIgnoringCase(token, "-n");
+}
+
 bool CSSPropertyParser::isSystemColor(int id)
 {
     return (id >= CSSValueActiveborder && id <= CSSValueWindowtext) || id == CSSValueMenu;
 }
 
 bool CSSPropertyParser::parseSVGValue(CSSPropertyID propId, bool important)
 {
     CSSParserValue* value = m_valueList->current();
     if (!value)
         return false;
@@ skipping 371 matching lines @@
         parsedValues->append(CSSPrimitiveValue::createIdentifier(CSSValueFill));
     if (!seenStroke)
         parsedValues->append(CSSPrimitiveValue::createIdentifier(CSSValueStroke));
     if (!seenMarkers)
         parsedValues->append(CSSPrimitiveValue::createIdentifier(CSSValueMarkers));
 
     return parsedValues.release();
 }
 
 } // namespace WebCore