Move PlatformSpeechSynthesisVoice off the heap.

third_party/WebKit/Source/platform/speech/PlatformSpeechSynthesisUtterance.h

 /*
  * Copyright (C) 2013 Apple Computer, 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 33 matching lines @@
 class PLATFORM_EXPORT PlatformSpeechSynthesisUtterance final : public GarbageCollectedFinalized<PlatformSpeechSynthesisUtterance> {
 public:
     static PlatformSpeechSynthesisUtterance* create(PlatformSpeechSynthesisUtteranceClient*);
 
     const String& text() const { return m_text; }
     void setText(const String& text) { m_text = text; }
 
     const String& lang() const { return m_lang; }
     void setLang(const String& lang) { m_lang = lang; }
 
-    PlatformSpeechSynthesisVoice* voice() const { return m_voice; }
+    PlatformSpeechSynthesisVoice* voice() const { return m_voice.get(); }
     void setVoice(PlatformSpeechSynthesisVoice* voice) { m_voice = voice; }
 
     // Range = [0, 1] where 1 is the default.
     float volume() const { return m_volume; }
     void setVolume(float volume) { m_volume = clampTo(volume, 0.0f, 1.0f); }
 
     // Range = [0.1, 10] where 1 is the default.
     float rate() const { return m_rate; }
     void setRate(float rate) { m_rate = clampTo(rate, 0.1f, 10.0f); }
 
     // Range = [0, 2] where 1 is the default.
     float pitch() const { return m_pitch; }
     void setPitch(float pitch) { m_pitch = clampTo(pitch, 0.0f, 2.0f); }
 
     double startTime() const { return m_startTime; }
     void setStartTime(double startTime) { m_startTime = startTime; }
 
     PlatformSpeechSynthesisUtteranceClient* client() const { return m_client; }
 
     DECLARE_TRACE();
 
 private:
     explicit PlatformSpeechSynthesisUtterance(PlatformSpeechSynthesisUtteranceClient*);
 
     Member<PlatformSpeechSynthesisUtteranceClient> m_client;
     String m_text;
     String m_lang;
-    Member<PlatformSpeechSynthesisVoice> m_voice;
+    RefPtr<PlatformSpeechSynthesisVoice> m_voice;
     float m_volume;
     float m_rate;
     float m_pitch;
     double m_startTime;
 };
 
 } // namespace blink
 
 #endif // PlatformSpeechSynthesisUtterance_h