Make CSSValuePool thread local to ensure correct parsing in colors on workers

third_party/WebKit/Source/core/css/parser/CSSParser.h

Index: third_party/WebKit/Source/core/css/parser/CSSParser.h
diff --git a/third_party/WebKit/Source/core/css/parser/CSSParser.h b/third_party/WebKit/Source/core/css/parser/CSSParser.h
index af98f80b422d4531f2cf9a1b82015c76933c8b86..106b1fb21f2caec0004bd2d2e1d5b5e35f543847 100644
--- a/third_party/WebKit/Source/core/css/parser/CSSParser.h
+++ b/third_party/WebKit/Source/core/css/parser/CSSParser.h
@@ -8,6 +8,7 @@
 #include "core/CSSPropertyNames.h"
 #include "core/CoreExport.h"
 #include "core/css/CSSValue.h"
+#include "core/css/CSSValuePool.h"
 #include "core/css/parser/CSSParserMode.h"
 #include "platform/graphics/Color.h"
 
@@ -54,7 +55,7 @@ public:
 
     // The color will only be changed when string contains a valid CSS color, so callers
     // can set it to a default color and ignore the boolean result.
-    static bool parseColor(Color&, const String&, bool strict = false);
+    static bool parseColor(Color&, const String&, CSSValuePool*, bool strict = false);
     static bool parseSystemColor(Color&, const String&);
 
     static void parseSheetForInspector(const CSSParserContext&, StyleSheetContents*, const String&, CSSParserObserver&);