Make classes and structures in web fast-allocated.

Source/web/DatabaseClientImpl.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 20 matching lines @@
 #ifndef DatabaseClientImpl_h
 #define DatabaseClientImpl_h
 
 #include "modules/webdatabase/DatabaseClient.h"
 #include "wtf/Forward.h"
 
 namespace blink {
 
 class DatabaseClientImpl final : public NoBaseWillBeGarbageCollectedFinalized<DatabaseClientImpl>, public DatabaseClient {
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(DatabaseClientImpl);
+    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(DatabaseClientImpl);
 public:
     static PassOwnPtrWillBeRawPtr<DatabaseClientImpl> create();
 
     ~DatabaseClientImpl() override;
     DECLARE_VIRTUAL_TRACE();
 
     bool allowDatabase(ExecutionContext*, const String& name, const String& displayName, unsigned long estimatedSize) override;
 
 private:
     DatabaseClientImpl();
 };
 
 } // namespace blink
 
 #endif // DatabaseClientImpl_h