Merge CSSMarkup and CSSOMUtils

Source/core/css/CSSMarkup.h

Index: Source/core/css/CSSMarkup.h
diff --git a/Source/core/css/CSSMarkup.h b/Source/core/css/CSSMarkup.h
index adb554c072fc4237329295c699166df46a5f5ece..8eeab90f4882e018ed22bcac1ece42189dc377a3 100644
--- a/Source/core/css/CSSMarkup.h
+++ b/Source/core/css/CSSMarkup.h
@@ -26,8 +26,6 @@
 #include "wtf/text/WTFString.h"
 
 // Helper functions for converting from CSSValues to text.
-// FIXME: This file has a similar purpose to
-// CSSOMUtils.h. Perhaps the two should be combined?
 
 namespace blink {
 
@@ -35,6 +33,11 @@ String quoteCSSString(const String&);
 String quoteCSSStringIfNeeded(const String&);
 String quoteCSSURLIfNeeded(const String&);
 
+// Common serializing methods. See: http://dev.w3.org/csswg/cssom/#common-serializing-idioms
+void serializeIdentifier(const String& identifier, StringBuilder& appendTo);
+void serializeString(const String&, StringBuilder& appendTo);
+
+
 } // namespace blink
 
 #endif // CSSMarkup_h