Revert of [Oilpan] Prepare full definition of classes before using Member

third_party/WebKit/Source/modules/webdatabase/SQLTransaction.cpp

 /*
  * Copyright (C) 2007, 2008, 2013 Apple 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 316 matching lines @@
     return true;
 }
 
 void SQLTransaction::clearCallbacks()
 {
     m_callback.clear();
     m_successCallback.clear();
     m_errorCallback.clear();
 }
 
-Database* SQLTransaction::database() const
-{
-    return m_database;
-}
-
 SQLTransactionErrorCallback* SQLTransaction::releaseErrorCallback()
 {
     return m_errorCallback.release();
 }
 
 } // namespace blink