Oilpan: IDBCursor should be detached from IDBRequest when the IDBRequest stops

Source/bindings/v8/WorkerScriptController.h

 /*
  * Copyright (C) 2009, 2012 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 48 matching lines @@
         int columnNumber;
         String sourceURL;
         ScriptValue exception;
     };
 
     class WorkerScriptController {
     public:
         explicit WorkerScriptController(WorkerGlobalScope&);
         ~WorkerScriptController();
 
+        void dispose();
+
         WorkerGlobalScope& workerGlobalScope() { return m_workerGlobalScope; }
 
         void evaluate(const ScriptSourceCode&, RefPtr<ErrorEvent>* = 0);
 
         void rethrowExceptionFromImportedScript(PassRefPtr<ErrorEvent>);
 
         // Async request to terminate a future JS execution. Eventually causes termination
         // exception raised during JS execution, if the worker thread happens to run JS.
         // After JS execution was terminated in this way, the Worker thread has to use
         // forbidExecution()/isExecutionForbidden() to guard against reentry into JS.
@@ skipping 32 matching lines @@
         bool m_executionForbidden;
         bool m_executionScheduledToTerminate;
         mutable Mutex m_scheduledTerminationMutex;
         RefPtr<ErrorEvent> m_errorEventFromImportedScript;
         OwnPtr<V8IsolateInterruptor> m_interruptor;
     };
 
 } // namespace WebCore
 
 #endif // WorkerScriptController_h