Implement CSS3TextDecorations runtime flag in favor of CSS3_TEXT

Source/core/css/CSSParser.cpp

Index: Source/core/css/CSSParser.cpp
diff --git a/Source/core/css/CSSParser.cpp b/Source/core/css/CSSParser.cpp
index 83af384ce1002c1f1ba2298668e516ae420ccffd..9daa85c53524d8f04909dc2a7fd5e52a8e8cb435 100644
--- a/Source/core/css/CSSParser.cpp
+++ b/Source/core/css/CSSParser.cpp
@@ -485,9 +485,7 @@ static inline bool isColorPropertyID(CSSPropertyID propertyId)
     case CSSPropertyWebkitBorderEndColor:
     case CSSPropertyWebkitBorderStartColor:
     case CSSPropertyWebkitColumnRuleColor:
-#if ENABLE(CSS3_TEXT)
     case CSSPropertyWebkitTextDecorationColor:
-#endif // CSS3_TEXT
     case CSSPropertyWebkitTextEmphasisColor:
     case CSSPropertyWebkitTextFillColor:
     case CSSPropertyWebkitTextStrokeColor:
@@ -1884,12 +1882,14 @@ bool CSSParser::parseValue(CSSPropertyID propId, bool important)
     case CSSPropertyTextUnderlineColor:
     case CSSPropertyTextOverlineColor:
     case CSSPropertyWebkitColumnRuleColor:
-#if ENABLE(CSS3_TEXT)
     case CSSPropertyWebkitTextDecorationColor:
-#endif // CSS3_TEXT
     case CSSPropertyWebkitTextEmphasisColor:
     case CSSPropertyWebkitTextFillColor:
     case CSSPropertyWebkitTextStrokeColor:
+        if (propId == CSSPropertyWebkitTextDecorationColor
+            && !RuntimeEnabledFeatures::css3TextDecorationsEnabled())
+            return false;
+
         if (id == CSSValueWebkitText)
             validPrimitive = true; // Always allow this, even when strict parsing is on,
                                     // since we use this in our UA sheets.
@@ -2182,21 +2182,25 @@ bool CSSParser::parseValue(CSSPropertyID propId, bool important)
         // none | [ underline || overline || line-through || blink ] | inherit
         return parseTextDecoration(propId, important);
 
-#if ENABLE(CSS3_TEXT)
     case CSSPropertyWebkitTextDecorationLine:
+        if (!RuntimeEnabledFeatures::css3TextDecorationsEnabled())
+            return false;
         // none | [ underline || overline || line-through ] | inherit
         return parseTextDecoration(propId, important);
 
     case CSSPropertyWebkitTextDecorationStyle:
+        if (!RuntimeEnabledFeatures::css3TextDecorationsEnabled())
+            return false;
         // solid | double | dotted | dashed | wavy
         if (id == CSSValueSolid || id == CSSValueDouble || id == CSSValueDotted || id == CSSValueDashed || id == CSSValueWavy)
             validPrimitive = true;
         break;
 
     case CSSPropertyWebkitTextUnderlinePosition:
+        if (!RuntimeEnabledFeatures::css3TextDecorationsEnabled())
+            return false;
         // auto | alphabetic | under
         return parseTextUnderlinePosition(important);
-#endif // CSS3_TEXT
 
     case CSSPropertyZoom:          // normal | reset | document | <number> | <percentage> | inherit
         if (id == CSSValueNormal || id == CSSValueReset || id == CSSValueDocument)
@@ -8815,7 +8819,6 @@ bool CSSParser::parsePerspectiveOrigin(CSSPropertyID propId, CSSPropertyID& prop
 
 void CSSParser::addTextDecorationProperty(CSSPropertyID propId, PassRefPtr<CSSValue> value, bool important)
 {
-#if ENABLE(CSS3_TEXT)
     // The text-decoration-line property takes priority over text-decoration, unless the latter has important priority set.
     if (propId == CSSPropertyTextDecoration && !important && m_currentShorthand == CSSPropertyInvalid) {
         for (unsigned i = 0; i < m_parsedProperties.size(); ++i) {
@@ -8823,7 +8826,6 @@ void CSSParser::addTextDecorationProperty(CSSPropertyID propId, PassRefPtr<CSSVa
                 return;
         }
     }
-#endif // CSS3_TEXT
     addProperty(propId, value, important);
 }
 
@@ -8841,13 +8843,11 @@ bool CSSParser::parseTextDecoration(CSSPropertyID propId, bool important)
     while (isValid && value) {
         switch (value->id) {
         case CSSValueBlink:
-#if ENABLE(CSS3_TEXT)
             // Blink value is not accepted by -webkit-text-decoration-line.
             isValid = propId != CSSPropertyWebkitTextDecorationLine;
             if (isValid)
                 list->append(cssValuePool().createIdentifierValue(value->id));
             break;
-#endif // CSS3_TEXT
         case CSSValueUnderline:
         case CSSValueOverline:
         case CSSValueLineThrough:
@@ -8869,7 +8869,6 @@ bool CSSParser::parseTextDecoration(CSSPropertyID propId, bool important)
     return false;
 }
 
-#if ENABLE(CSS3_TEXT)
 bool CSSParser::parseTextUnderlinePosition(bool important)
 {
     // The text-underline-position property has sintax "auto | alphabetic | [ under || [ left | right ] ]".
@@ -8888,7 +8887,6 @@ bool CSSParser::parseTextUnderlinePosition(bool important)
     }
     return false;
 }
-#endif // CSS3_TEXT
 
 bool CSSParser::parseTextEmphasisStyle(bool important)
 {