Revert of Enable Oilpan by default in modules/speech/

Source/modules/speech/SpeechSynthesisVoice.h

Index: Source/modules/speech/SpeechSynthesisVoice.h
diff --git a/Source/modules/speech/SpeechSynthesisVoice.h b/Source/modules/speech/SpeechSynthesisVoice.h
index 81c82324dc90e7dde3baab0103b0a6a9b4e6747f..ebdfdb2bcf6f05d6f719b273e878b1d68acfb4a0 100644
--- a/Source/modules/speech/SpeechSynthesisVoice.h
+++ b/Source/modules/speech/SpeechSynthesisVoice.h
@@ -35,9 +35,9 @@
 
 namespace WebCore {
 
-class SpeechSynthesisVoice FINAL : public GarbageCollectedFinalized<SpeechSynthesisVoice>, public ScriptWrappable {
+class SpeechSynthesisVoice FINAL : public RefCountedWillBeGarbageCollectedFinalized<SpeechSynthesisVoice>, public ScriptWrappable {
 public:
-    static SpeechSynthesisVoice* create(PassRefPtr<PlatformSpeechSynthesisVoice>);
+    static PassRefPtrWillBeRawPtr<SpeechSynthesisVoice> create(PassRefPtr<PlatformSpeechSynthesisVoice>);
 
     const String& voiceURI() const { return m_platformVoice->voiceURI(); }
     const String& name() const { return m_platformVoice->name(); }