[oilpan] Move IDBDatabase, IDBDatabaseCallbacks, IDBDatabaseBackendInterface and other related clas…

Source/modules/indexeddb/IDBDatabaseCallbacksImpl.h

 /*
  * Copyright (C) 2011 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 18 matching lines @@
 #include "modules/indexeddb/IDBDatabaseCallbacks.h"
 #include "wtf/RefCounted.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 class IDBDatabase;
 
 class IDBDatabaseCallbacksImpl : public IDBDatabaseCallbacks {
 public:
-    static PassRefPtr<IDBDatabaseCallbacksImpl> create();
+    static IDBDatabaseCallbacksImpl* create();
     virtual ~IDBDatabaseCallbacksImpl();
 
     // IDBDatabaseCallbacks
     virtual void onForcedClose();
     virtual void onVersionChange(int64_t oldVersion, int64_t newVersion);
 
     virtual void onAbort(int64_t transactionId, PassRefPtr<IDBDatabaseError>);
     virtual void onComplete(int64_t transactionId);
 
     void connect(IDBDatabase*);
 
+    virtual void trace(Visitor*);
+
 private:
     IDBDatabaseCallbacksImpl();
 
-    // The initial IDBOpenDBRequest or final IDBDatabase maintains a RefPtr to this
+    // The initial IDBOpenDBRequest or final IDBDatabase maintains a RefPtr to this.
+    // FIXME(oilpan): We should make this a Member once we move the entire IndexedDB hierarchy to the heap.
+    // We cannot make it a Member at this point since changing a raw pointer to a Member can create a cycle.
     IDBDatabase* m_database;
 };
 
 } // namespace WebCore
 
 #endif // IDBDatabaseCallbacksImpl_h