Oilpan: Remove GC_INFO_{DEFINE,DECLARE} macros

Source/modules/speech/SpeechSynthesis.h

Index: Source/modules/speech/SpeechSynthesis.h
diff --git a/Source/modules/speech/SpeechSynthesis.h b/Source/modules/speech/SpeechSynthesis.h
index 804c60a2cd2e5d450d5d33751a4d1881e2a493d1..eaa546f8aed2e61ebd98cbdd65c4b3ec5beeac81 100644
--- a/Source/modules/speech/SpeechSynthesis.h
+++ b/Source/modules/speech/SpeechSynthesis.h
@@ -45,7 +45,6 @@ class ExceptionState;
 class PlatformSpeechSynthesizerClient;
 
 class SpeechSynthesis FINAL : public RefCountedWillBeRefCountedGarbageCollected<SpeechSynthesis>, public PlatformSpeechSynthesizerClient, public ScriptWrappable, public ContextLifecycleObserver, public EventTargetWithInlineData {
-    DECLARE_GC_INFO;
     DEFINE_EVENT_TARGET_REFCOUNTING(RefCountedWillBeRefCountedGarbageCollected<SpeechSynthesis>);
 public:
     static PassRefPtrWillBeRawPtr<SpeechSynthesis> create(ExecutionContext*);