Oilpan: move platform speech objects to the heap.

Source/platform/speech/PlatformSpeechSynthesisVoice.h

Index: Source/platform/speech/PlatformSpeechSynthesisVoice.h
diff --git a/Source/platform/speech/PlatformSpeechSynthesisVoice.h b/Source/platform/speech/PlatformSpeechSynthesisVoice.h
index 75b3043470a10a5964c973c168fb466890027a74..0a03543f35e414b5708e7c2504b6bbcf710be23c 100644
--- a/Source/platform/speech/PlatformSpeechSynthesisVoice.h
+++ b/Source/platform/speech/PlatformSpeechSynthesisVoice.h
@@ -27,16 +27,15 @@
 #define PlatformSpeechSynthesisVoice_h
 
 #include "platform/PlatformExport.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefCounted.h"
+#include "platform/heap/Handle.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
-class PLATFORM_EXPORT PlatformSpeechSynthesisVoice : public RefCounted<PlatformSpeechSynthesisVoice> {
+class PLATFORM_EXPORT PlatformSpeechSynthesisVoice FINAL : public GarbageCollectedFinalized<PlatformSpeechSynthesisVoice> {
 public:
-    static PassRefPtr<PlatformSpeechSynthesisVoice> create(const String& voiceURI, const String& name, const String& lang, bool localService, bool isDefault);
-    static PassRefPtr<PlatformSpeechSynthesisVoice> create();
+    static PlatformSpeechSynthesisVoice* create(const String& voiceURI, const String& name, const String& lang, bool localService, bool isDefault);
+    static PlatformSpeechSynthesisVoice* create();
 
     const String& voiceURI() const { return m_voiceURI; }
     void setVoiceURI(const String& voiceURI) { m_voiceURI = voiceURI; }
@@ -53,6 +52,8 @@ public:
     bool isDefault() const { return m_default; }
     void setIsDefault(bool isDefault) { m_default = isDefault; }
 
+    void trace(Visitor*) { }
+
 private:
     PlatformSpeechSynthesisVoice(const String& voiceURI, const String& name, const String& lang, bool localService, bool isDefault);
     PlatformSpeechSynthesisVoice();