Add support for case-insensitive attribute value selectors

Source/core/css/parser/BisonCSSParser.h

Index: Source/core/css/parser/BisonCSSParser.h
diff --git a/Source/core/css/parser/BisonCSSParser.h b/Source/core/css/parser/BisonCSSParser.h
index 3c457b003d343dae59e44d5e34b0b9b5baeb73f9..4457fab88e8000ab9f082b3f4cc12b96c07f5c30 100644
--- a/Source/core/css/parser/BisonCSSParser.h
+++ b/Source/core/css/parser/BisonCSSParser.h
@@ -100,6 +100,7 @@ public:
     static PassRefPtr<ImmutableStylePropertySet> parseInlineStyleDeclaration(const String&, Element*);
     PassRefPtrWillBeRawPtr<MediaQuerySet> parseMediaQueryList(const String&);
     PassOwnPtr<Vector<double> > parseKeyframeKeyList(const String&);
+    bool parseAttributeFlags(unsigned& flags, const String&);
 
     static bool parseValue(MutableStylePropertySet*, CSSPropertyID, const String&, bool important, const Document&);