[WIP]Add WebPrivateHeapPtr and use it for speech platform layer.

Source/core/speech/SpeechInputEvent.h

 /*
  * Copyright (C) 2010 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 copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 12 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef SpeechInputEvent_h
 #define SpeechInputEvent_h
 
 #if ENABLE(INPUT_SPEECH)
 
 #include "core/events/Event.h"
 #include "core/speech/SpeechInputResultList.h"
-
+#include "heap/Handle.h"
 #include "wtf/PassRefPtr.h"
 
 namespace WebCore {
 
 class SpeechInputEvent FINAL : public Event {
 public:
     static PassRefPtr<SpeechInputEvent> create();
     static PassRefPtr<SpeechInputEvent> create(const AtomicString& eventType, const SpeechInputResultArray& results);
     virtual ~SpeechInputEvent();
 
     SpeechInputResultList* results() const { return m_results.get(); }
 
     virtual const AtomicString& interfaceName() const OVERRIDE;
 
 private:
     SpeechInputEvent();
     SpeechInputEvent(const AtomicString& eventType, const SpeechInputResultArray& results);
 
-    RefPtr<SpeechInputResultList> m_results;
+    RefPtrWillBePersistent<SpeechInputResultList> m_results;
 };
 
 } // namespace WebCore
 
 #endif // ENABLE(INPUT_SPEECH)
 
 #endif // SpeechInputEvent_h