Revert of Move speech module over to Oilpan.

Source/modules/speech/SpeechSynthesisUtterance.cpp

Index: Source/modules/speech/SpeechSynthesisUtterance.cpp
diff --git a/Source/modules/speech/SpeechSynthesisUtterance.cpp b/Source/modules/speech/SpeechSynthesisUtterance.cpp
index c6b79df2a47409ff600ebd5a1b59ee9122607a27..7031c0d90ce68e3ec1220111ff060a0fa6ae8ff8 100644
--- a/Source/modules/speech/SpeechSynthesisUtterance.cpp
+++ b/Source/modules/speech/SpeechSynthesisUtterance.cpp
@@ -28,11 +28,9 @@
 
 namespace WebCore {
 
-DEFINE_GC_INFO(SpeechSynthesisUtterance);
-
-PassRefPtrWillBeRawPtr<SpeechSynthesisUtterance> SpeechSynthesisUtterance::create(ExecutionContext* context, const String& text)
+PassRefPtr<SpeechSynthesisUtterance> SpeechSynthesisUtterance::create(ExecutionContext* context, const String& text)
 {
-    return adoptRefCountedWillBeRefCountedGarbageCollected(new SpeechSynthesisUtterance(context, text));
+    return adoptRef(new SpeechSynthesisUtterance(context, text));
 }
 
 SpeechSynthesisUtterance::SpeechSynthesisUtterance(ExecutionContext* context, const String& text)
@@ -73,9 +71,4 @@
         m_platformUtterance->setVoice(voice->platformVoice());
 }
 
-void SpeechSynthesisUtterance::trace(Visitor* visitor)
-{
-    visitor->trace(m_voice);
-}
-
 } // namespace WebCore