Make blink classes and structures in core/css fast-allocated

Source/core/css/MediaValuesCached.h

Index: Source/core/css/MediaValuesCached.h
diff --git a/Source/core/css/MediaValuesCached.h b/Source/core/css/MediaValuesCached.h
index fa7676ea268031c2038fe9df16e9d035f6e9ae6c..9fd4338fe55b4c1d1d2537e0495c0d803e008945 100644
--- a/Source/core/css/MediaValuesCached.h
+++ b/Source/core/css/MediaValuesCached.h
@@ -13,6 +13,7 @@ namespace blink {
 class CORE_EXPORT MediaValuesCached final : public MediaValues {
 public:
     struct MediaValuesCachedData {
+        DISALLOW_ALLOCATION();
         // Members variables must be thread safe, since they're copied to the parser thread
         int viewportWidth;
         int viewportHeight;