Implement CSS3TextDecorations runtime flag in favor of CSS3_TEXT

Source/core/css/CSSPrimitiveValueMappings.h

 /*
  * Copyright (C) 2007 Alexey Proskuryakov <ap@nypop.com>.
  * Copyright (C) 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2009 Jeff Schiller <codedread@gmail.com>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
@@ skipping 2286 matching lines @@
     case CSSValueLineThrough:
         return LINE_THROUGH;
     case CSSValueBlink:
         return BLINK;
     }
 
     ASSERT_NOT_REACHED();
     return TDNONE;
 }
 
-#if ENABLE(CSS3_TEXT)
 template<> inline CSSPrimitiveValue::operator TextDecorationStyle() const
 {
     switch (m_value.ident) {
     case CSSValueSolid:
         return TextDecorationStyleSolid;
     case CSSValueDouble:
         return TextDecorationStyleDouble;
     case CSSValueDotted:
         return TextDecorationStyleDotted;
     case CSSValueDashed:
         return TextDecorationStyleDashed;
     case CSSValueWavy:
         return TextDecorationStyleWavy;
     }
 
     ASSERT_NOT_REACHED();
     return TextDecorationStyleSolid;
 }
 
+#if ENABLE(CSS3_TEXT)
 template<> inline CSSPrimitiveValue::CSSPrimitiveValue(TextUnderlinePosition e)
     : CSSValue(PrimitiveClass)
 {
     m_primitiveUnitType = CSS_IDENT;
     switch (e) {
     case TextUnderlinePositionAuto:
         m_value.ident = CSSValueAuto;
         break;
     case TextUnderlinePositionAlphabetic:
         m_value.ident = CSSValueAlphabetic;
@@ skipping 2166 matching lines @@
 
     ASSERT_NOT_REACHED();
     return MT_LUMINANCE;
 }
 
 #endif // ENABLE(SVG)
 
 }
 
 #endif