Move fast-path color parsing from CSSPropertyParser to CSSParserFastPaths

Source/core/css/parser/CSSParserFastPaths.h

Index: Source/core/css/parser/CSSParserFastPaths.h
diff --git a/Source/core/css/parser/CSSParserFastPaths.h b/Source/core/css/parser/CSSParserFastPaths.h
index 1b3a31b3a721d4436364a00e9f0d10dc83d7cc3c..78acc935be2246bc8762c27f2354bfa1fea1e6ef 100644
--- a/Source/core/css/parser/CSSParserFastPaths.h
+++ b/Source/core/css/parser/CSSParserFastPaths.h
@@ -7,6 +7,7 @@
 
 #include "core/CSSPropertyNames.h"
 #include "core/CSSValueKeywords.h"
+#include "platform/graphics/Color.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
 
@@ -23,6 +24,10 @@ public:
     // Properties handled here shouldn't be explicitly handled in CSSPropertyParser
     static bool isKeywordPropertyID(CSSPropertyID);
     static bool isValidKeywordPropertyAndValue(CSSPropertyID, CSSValueID);
+
+    // Keywords like 'green' will be resolved here, unlike during regular
+    // property parsing where we'd leave it as a keyword.
+    static bool parseColorAsRGBA32(RGBA32&, const String&, bool quirksMode);

[alancutter (OOO until 2018), 2015/06/10 00:31:20]

Comment could be simpler.
// Resolves keywords like "green".

parseRGBA32()?

Out parameter should be last.

 };
 
 } // namespace blink