Clean up forward declarations in Source/modules

Source/modules/indexeddb/WebIDBCallbacksImpl.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:
  *
  * 1. Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *
@@ skipping 13 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebIDBCallbacksImpl_h
 #define WebIDBCallbacksImpl_h
 
 #include "public/platform/WebIDBCallbacks.h"
 #include "wtf/PassOwnPtr.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefPtr.h"
 
 namespace blink {
 
 class IDBRequest;
 class WebBlobInfo;
 class WebData;
 class WebIDBCursor;
 class WebIDBDatabase;
 class WebIDBDatabaseError;
-class WebIDBIndex;
 class WebIDBKey;
 class WebIDBKeyPath;
 struct WebIDBMetadata;
 
 class WebIDBCallbacksImpl final : public WebIDBCallbacks {
 public:
     static PassOwnPtr<WebIDBCallbacksImpl> create(IDBRequest*);
 
     virtual ~WebIDBCallbacksImpl();
 
@@ skipping 14 matching lines @@
 private:
     explicit WebIDBCallbacksImpl(IDBRequest*);
 
     Persistent<IDBRequest> m_request;
     int m_asyncOperationId;
 };
 
 } // namespace blink
 
 #endif // WebIDBCallbacksImpl_h