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

Source/core/speech/SpeechInputResult.h

Index: Source/core/speech/SpeechInputResult.h
diff --git a/Source/core/speech/SpeechInputResult.h b/Source/core/speech/SpeechInputResult.h
index 5a5d44da7bdf6c3f42337ce6a7cc352fe1e6f107..dd05524db66f2c0fc9eeae280816667a906703a2 100644
--- a/Source/core/speech/SpeechInputResult.h
+++ b/Source/core/speech/SpeechInputResult.h
@@ -29,6 +29,7 @@
 #if ENABLE(INPUT_SPEECH)
 
 #include "bindings/v8/ScriptWrappable.h"
+#include "heap/Handle.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/text/WTFString.h"
@@ -37,14 +38,17 @@ namespace WebCore {
 
 // This class holds one speech recognition result including the text and other related
 // fields, as received from the embedder.
-class SpeechInputResult : public RefCounted<SpeechInputResult>, public ScriptWrappable {
+class SpeechInputResult : public RefCountedWillBeGarbageCollectedFinalized<SpeechInputResult>, public ScriptWrappable {
+    DECLARE_GC_INFO;
 public:
-    static PassRefPtr<SpeechInputResult> create(const SpeechInputResult& source);
-    static PassRefPtr<SpeechInputResult> create(const String& utterance, double confidence);
+    static PassRefPtrWillBeRawPtr<SpeechInputResult> create(const SpeechInputResult& source);
+    static PassRefPtrWillBeRawPtr<SpeechInputResult> create(const String& utterance, double confidence);
 
     double confidence() const;
     const String& utterance() const;
 
+    void trace(Visitor *) { }
+
 private:
     SpeechInputResult(const String& utterance, double confidence);
 
@@ -52,7 +56,7 @@ private:
     double m_confidence;
 };
 
-typedef Vector<RefPtr<SpeechInputResult> > SpeechInputResultArray;
+typedef WillBeHeapVector<RefPtrWillBeMember<SpeechInputResult> > SpeechInputResultArray;
 
 } // namespace WebCore