Oilpan: simplify quota storage callbacks objects.

Source/web/StorageQuotaClientImpl.h

 /*
  * Copyright (C) 2014 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 21 matching lines @@
 #define StorageQuotaClientImpl_h
 
 #include "modules/quota/StorageQuotaClient.h"
 #include "wtf/Forward.h"
 
 namespace blink {
 
 class StorageQuotaClientImpl : public NoBaseWillBeGarbageCollectedFinalized<StorageQuotaClientImpl>, public StorageQuotaClient {
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(StorageQuotaClientImpl);
 public:
-    static PassOwnPtrWillBeRawPtr<StorageQuotaClientImpl> create();
+    static PassOwnPtrWillBeRawPtr<StorageQuotaClientImpl> create()
+    {
+        return adoptPtrWillBeNoop(new StorageQuotaClientImpl());
+    }
 
     virtual ~StorageQuotaClientImpl();
 
     virtual void requestQuota(ExecutionContext*, WebStorageQuotaType, unsigned long long newQuotaInBytes, StorageQuotaCallback*, StorageErrorCallback*) override;
     virtual ScriptPromise requestPersistentQuota(ScriptState*, unsigned long long newQuotaInBytes) override;
 
     virtual void trace(Visitor* visitor) override { StorageQuotaClient::trace(visitor); }
 
 private:
     StorageQuotaClientImpl();
 };
 
 } // namespace blink
 
 #endif // StorageQuotaClientImpl_h