Split the CSSParserContext class out of CSSParserMode into its own file.

third_party/WebKit/Source/core/css/MediaValuesCached.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MediaValuesCached_h
 #define MediaValuesCached_h
 
 #include "core/CoreExport.h"
 #include "core/css/MediaValues.h"
+#include "platform/CrossThreadCopier.h"
 
 namespace blink {
 
 class CORE_EXPORT MediaValuesCached final : public MediaValues {
  public:
   struct MediaValuesCachedData final {
     DISALLOW_NEW();
     // Members variables must be thread safe, since they're copied to the parser
     // thread
     double viewportWidth;
@@ skipping 100 matching lines @@
 struct CrossThreadCopier<MediaValuesCached::MediaValuesCachedData> {
   typedef MediaValuesCached::MediaValuesCachedData Type;
   static Type copy(const MediaValuesCached::MediaValuesCachedData& data) {
     return data.deepCopy();
   }
 };
 
 }  // namespace blink
 
 #endif  // MediaValuesCached_h