Add [WillBeGarbageCollected] to Event.idl

Source/modules/speech/SpeechRecognitionEvent.h

Index: Source/modules/speech/SpeechRecognitionEvent.h
diff --git a/Source/modules/speech/SpeechRecognitionEvent.h b/Source/modules/speech/SpeechRecognitionEvent.h
index 59d58a6b81cc9ccb120cb640f6250eddada6eebb..77871bfe85c59c779f49a40d483b2cb90ae83a3f 100644
--- a/Source/modules/speech/SpeechRecognitionEvent.h
+++ b/Source/modules/speech/SpeechRecognitionEvent.h
@@ -47,8 +47,8 @@ public:
 
 class SpeechRecognitionEvent FINAL : public Event {
 public:
-    static PassRefPtr<SpeechRecognitionEvent> create();
-    static PassRefPtr<SpeechRecognitionEvent> create(const AtomicString&, const SpeechRecognitionEventInit&);
+    static PassRefPtrWillBeRawPtr<SpeechRecognitionEvent> create();
+    static PassRefPtrWillBeRawPtr<SpeechRecognitionEvent> create(const AtomicString&, const SpeechRecognitionEventInit&);
     virtual ~SpeechRecognitionEvent();
 
     static PassRefPtr<SpeechRecognitionEvent> createResult(unsigned long resultIndex, const WillBeHeapVector<RefPtrWillBeMember<SpeechRecognitionResult> >& results);