Fix serialization of content property to always quote

Source/core/css/CSSPrimitiveValue.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 71 matching lines @@
         CSS_IN = 8,
         CSS_PT = 9,
         CSS_PC = 10,
         CSS_DEG = 11,
         CSS_RAD = 12,
         CSS_GRAD = 13,
         CSS_MS = 14,
         CSS_S = 15,
         CSS_HZ = 16,
         CSS_KHZ = 17,
-        CSS_STRING = 19,
+        CSS_CUSTOM_IDENT = 19,
         CSS_URI = 20,
         CSS_IDENT = 21,
         CSS_ATTR = 22,
         CSS_COUNTER = 23,
         CSS_RECT = 24,
         CSS_RGBCOLOR = 25,
         // From CSS Values and Units. Viewport-percentage Lengths (vw/vh/vmin/vmax).
         CSS_VW = 26,
         CSS_VH = 27,
         CSS_VMIN = 28,
@@ skipping 16 matching lines @@
         // This is used by the CSS Shapes draft
         CSS_SHAPE = 111,
 
         // Used by border images.
         CSS_QUAD = 112,
 
         CSS_CALC = 113,
         CSS_CALC_PERCENTAGE_WITH_NUMBER = 114,
         CSS_CALC_PERCENTAGE_WITH_LENGTH = 115,
 
+        CSS_STRING = 116,
+
         CSS_PROPERTY_ID = 117,
         CSS_VALUE_ID = 118
     };
 
     enum LengthUnitType {
         UnitTypePixels = 0,
         UnitTypePercentage,
         UnitTypeFontSize,
         UnitTypeFontXSize,
         UnitTypeRootFontSize,
@@ skipping 53 matching lines @@
     {
         return (type >= CSS_EMS && type <= CSS_PC) || type == CSS_REMS || type == CSS_CHS || isViewportPercentageLength(type);
     }
     bool isLength() const { return isLength(primitiveType()); }
     bool isNumber() const { return primitiveType() == CSS_NUMBER; }
     bool isPercentage() const { return primitiveType() == CSS_PERCENTAGE; }
     bool isPx() const { return primitiveType() == CSS_PX; }
     bool isRect() const { return m_primitiveUnitType == CSS_RECT; }
     bool isRGBColor() const { return m_primitiveUnitType == CSS_RGBCOLOR; }
     bool isShape() const { return m_primitiveUnitType == CSS_SHAPE; }
-    bool isString() const { return m_primitiveUnitType == CSS_STRING; }
+    bool isString() const { return m_primitiveUnitType == CSS_CUSTOM_IDENT || m_primitiveUnitType == CSS_STRING; }
     bool isTime() const { return m_primitiveUnitType == CSS_S || m_primitiveUnitType == CSS_MS; }
     bool isURI() const { return m_primitiveUnitType == CSS_URI; }
     bool isCalculated() const { return m_primitiveUnitType == CSS_CALC; }
     bool isCalculatedPercentageWithNumber() const { return primitiveType() == CSS_CALC_PERCENTAGE_WITH_NUMBER; }
     bool isCalculatedPercentageWithLength() const { return primitiveType() == CSS_CALC_PERCENTAGE_WITH_LENGTH; }
     static bool isDotsPerInch(UnitType type) { return type == CSS_DPI; }
     static bool isDotsPerPixel(UnitType type) { return type == CSS_DPPX; }
     static bool isDotsPerCentimeter(UnitType type) { return type == CSS_DPCM; }
     static bool isResolution(UnitType type) { return type >= CSS_DPPX && type <= CSS_DPCM; }
     bool isFlex() const { return primitiveType() == CSS_FR; }
@@ skipping 94 matching lines @@
     CSSBasicShape* getShapeValue() const { return m_primitiveUnitType != CSS_SHAPE ? 0 : m_value.shape; }
 
     CSSCalcValue* cssCalcValue() const { return m_primitiveUnitType != CSS_CALC ? 0 : m_value.calc; }
 
     CSSPropertyID getPropertyID() const { return m_primitiveUnitType == CSS_PROPERTY_ID ? m_value.propertyID : CSSPropertyInvalid; }
     CSSValueID getValueID() const { return m_primitiveUnitType == CSS_VALUE_ID ? m_value.valueID : CSSValueInvalid; }
 
     template<typename T> inline operator T() const; // Defined in CSSPrimitiveValueMappings.h
 
     static const char* unitTypeToString(UnitType);
-    String customCSSText(CSSTextFormattingFlags = QuoteCSSStringIfNeeded) const;
+    String customCSSText() const;
 
     bool isQuirkValue() { return m_isQuirkValue; }
 
     bool equals(const CSSPrimitiveValue&) const;
 
     DECLARE_TRACE_AFTER_DISPATCH();
 
     static UnitType canonicalUnitTypeForCategory(UnitCategory);
     static double conversionToCanonicalUnitsScaleFactor(UnitType);
 
@@ skipping 59 matching lines @@
 };
 
 typedef CSSPrimitiveValue::CSSLengthArray CSSLengthArray;
 typedef CSSPrimitiveValue::CSSLengthTypeArray CSSLengthTypeArray;
 
 DEFINE_CSS_VALUE_TYPE_CASTS(CSSPrimitiveValue, isPrimitiveValue());
 
 } // namespace blink
 
 #endif // CSSPrimitiveValue_h