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

Source/core/speech/SpeechInputResultList.cpp

Index: Source/core/speech/SpeechInputResultList.cpp
diff --git a/Source/core/speech/SpeechInputResultList.cpp b/Source/core/speech/SpeechInputResultList.cpp
index 86f7fda07648bce06568865776a2856a57d6551c..5c333a5eb18f47dd0cbb3896facc5208458ab5d4 100644
--- a/Source/core/speech/SpeechInputResultList.cpp
+++ b/Source/core/speech/SpeechInputResultList.cpp
@@ -35,9 +35,11 @@
 
 namespace WebCore {
 
-PassRefPtr<SpeechInputResultList> SpeechInputResultList::create(const SpeechInputResultArray& results)
+DEFINE_GC_INFO(SpeechInputResultList);
+
+PassRefPtrWillBeRawPtr<SpeechInputResultList> SpeechInputResultList::create(const SpeechInputResultArray& results)
 {
-    return adoptRef(new SpeechInputResultList(results));
+    return adoptRefWillBeNoop(new SpeechInputResultList(results));
 }
 
 SpeechInputResult* SpeechInputResultList::item(unsigned index)
@@ -46,11 +48,16 @@ SpeechInputResult* SpeechInputResultList::item(unsigned index)
 }
 
 SpeechInputResultList::SpeechInputResultList(const SpeechInputResultArray& results)
-    : m_results(results) // Takes a copy of the array of RefPtrs.
+    : m_results(results) // Copies the incoming result array.
 {
     ScriptWrappable::init(this);
 }
 
+void SpeechInputResultList::trace(Visitor* visitor)
+{
+    visitor->trace(m_results);
+}
+
 } // namespace WebCore
 
 #endif // ENABLE(INPUT_SPEECH)