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

Source/core/css/resolver/MatchedPropertiesCache.h

Index: Source/core/css/resolver/MatchedPropertiesCache.h
diff --git a/Source/core/css/resolver/MatchedPropertiesCache.h b/Source/core/css/resolver/MatchedPropertiesCache.h
index 6c1a7fb7c55430f96660382436872ce79417dd3c..770ab844f3adcab8d054d130c2cbd6d119cb47c3 100644
--- a/Source/core/css/resolver/MatchedPropertiesCache.h
+++ b/Source/core/css/resolver/MatchedPropertiesCache.h
@@ -37,7 +37,7 @@ class ComputedStyle;
 class StyleResolverState;
 
 class CachedMatchedProperties final : public NoBaseWillBeGarbageCollectedFinalized<CachedMatchedProperties> {
-
+    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(CachedMatchedProperties);
 public:
     WillBeHeapVector<MatchedProperties> matchedProperties;
     RefPtr<ComputedStyle> computedStyle;