Oilpan: Prepare to move SQLError to oilpan heap.

Source/modules/webdatabase/SQLTransaction.h

 /*
  * Copyright (C) 2007, 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 25 matching lines @@
 #include "modules/webdatabase/SQLStatement.h"
 #include "modules/webdatabase/SQLTransactionStateMachine.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
 
 namespace WebCore {
 
 class AbstractSQLTransactionBackend;
 class Database;
 class ExceptionState;
-class SQLError;
+class SQLErrorData;
 class SQLStatementCallback;
 class SQLStatementErrorCallback;
 class SQLTransactionCallback;
 class SQLTransactionErrorCallback;
 class SQLValue;
 class VoidCallback;
 
 class SQLTransaction FINAL : public AbstractSQLTransaction, public SQLTransactionStateMachine<SQLTransaction>, public ScriptWrappable {
 public:
     static PassRefPtrWillBeRawPtr<SQLTransaction> create(Database*, PassOwnPtr<SQLTransactionCallback>,
@@ skipping 40 matching lines @@
 
     SQLTransactionState nextStateForTransactionError();
 
     RefPtrWillBeMember<Database> m_database;
     RefPtrWillBeMember<AbstractSQLTransactionBackend> m_backend;
     SQLCallbackWrapper<SQLTransactionCallback> m_callbackWrapper;
     SQLCallbackWrapper<VoidCallback> m_successCallbackWrapper;
     SQLCallbackWrapper<SQLTransactionErrorCallback> m_errorCallbackWrapper;
 
     bool m_executeSqlAllowed;
-    RefPtr<SQLError> m_transactionError;
+    OwnPtr<SQLErrorData> m_transactionError;
 
     bool m_readOnly;
 };
 
 } // namespace WebCore
 
 #endif // SQLTransaction_h