Oilpan: move platform speech objects to the heap.

Source/platform/exported/WebSpeechSynthesizerClientImpl.cpp

Index: Source/platform/exported/WebSpeechSynthesizerClientImpl.cpp
diff --git a/Source/platform/exported/WebSpeechSynthesizerClientImpl.cpp b/Source/platform/exported/WebSpeechSynthesizerClientImpl.cpp
index da6fc390deca868cd10ae34211af62e10a2e8466..0102a3e755a11aa36fa439b14650d8ae780d48a2 100644
--- a/Source/platform/exported/WebSpeechSynthesizerClientImpl.cpp
+++ b/Source/platform/exported/WebSpeechSynthesizerClientImpl.cpp
@@ -42,9 +42,9 @@ WebSpeechSynthesizerClientImpl::~WebSpeechSynthesizerClientImpl()
 
 void WebSpeechSynthesizerClientImpl::setVoiceList(const blink::WebVector<blink::WebSpeechSynthesisVoice>& voices)
 {
-    Vector<RefPtr<PlatformSpeechSynthesisVoice> > outVoices;
+    HeapVector<Member<PlatformSpeechSynthesisVoice> > outVoices;
     for (size_t i = 0; i < voices.size(); i++)
-        outVoices.append(PassRefPtr<PlatformSpeechSynthesisVoice>(voices[i]));
+        outVoices.append(voices[i]);
     m_synthesizer->setVoiceList(outVoices);
     m_client->voicesDidChange();
 }
@@ -84,4 +84,10 @@ void WebSpeechSynthesizerClientImpl::sentenceBoundaryEventOccurred(const blink::
     m_client->boundaryEventOccurred(utterance, SpeechSentenceBoundary, charIndex);
 }
 
+void WebSpeechSynthesizerClientImpl::trace(Visitor* visitor)
+{
+    visitor->trace(m_synthesizer);
+    visitor->trace(m_client);
+}
+
 } // namespace WebCore