A thread-safe Media Query Parser

Source/core/css/CSSValueIDHelper.h

Index: Source/core/css/CSSValueIDHelper.h
diff --git a/Source/core/css/Pair.cpp b/Source/core/css/CSSValueIDHelper.h
similarity index 52%
copy from Source/core/css/Pair.cpp
copy to Source/core/css/CSSValueIDHelper.h
index 5362b6b52747f321f8c880c5518db518edd0230f..25e4eb65bddc8ce09a5e2f61007e496106c4727e 100644
--- a/Source/core/css/Pair.cpp
+++ b/Source/core/css/CSSValueIDHelper.h
@@ -2,15 +2,16 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "config.h"
-#include "core/css/Pair.h"
+#ifndef CSSValueIDHelper_h
+#define CSSValueIDHelper_h
+
+#include "CSSValueKeywords.h"
+
+class CSSParserString;
 
 namespace WebCore {
 
-void Pair::trace(Visitor* visitor)
-{
-    visitor->trace(m_first);
-    visitor->trace(m_second);
-}
+CSSValueID cssValueKeywordID(const CSSParserString&);
 
 }
+#endif