Add support for case-insensitive attribute value selectors

Source/core/css/CSSParserValues.h

Index: Source/core/css/CSSParserValues.h
diff --git a/Source/core/css/CSSParserValues.h b/Source/core/css/CSSParserValues.h
index 321c0b113e7f5485ebdb01a3070f39ce72f9d9ca..350ac66d471746f75e64d441c5542f66c7af69f2 100644
--- a/Source/core/css/CSSParserValues.h
+++ b/Source/core/css/CSSParserValues.h
@@ -221,7 +221,7 @@ public:
 
     CSSSelector::Relation relation() const { return m_selector->relation(); }
     void setValue(const AtomicString& value) { m_selector->setValue(value); }
-    void setAttribute(const QualifiedName& value) { m_selector->setAttribute(value); }
+    void setAttribute(const QualifiedName& value, unsigned flags) { m_selector->setAttribute(value, flags); }

[eseidel, 2014/07/29 15:43:22]

How many flags are there?  Should we just list out the enums instead?

setAttribute(value, CaseSensitive, OtherFlag, FinalFlag)

Or should the flags be wrapped in a named type even if they're stored as an
unsigned in the end?
AttributeFlags flags(CaseSensitive, OtherFlag, FinalFlag);
setAttribute(value, flags);

[eseidel, 2014/07/29 15:46:01]

If there aren't any other flags, feels like we coudl just stick with the one
enum for now:

setAttribute(value, CaseSensitive)

[fs, 2014/07/29 17:14:32]

Dropped the notion of 'flags' and made it a plain enum. (Maybe the rename was a
bit unnecessary...)

     void setArgument(const AtomicString& value) { m_selector->setArgument(value); }
     void setMatch(CSSSelector::Match value) { m_selector->setMatch(value); }
     void setRelation(CSSSelector::Relation value) { m_selector->setRelation(value); }