Add [WillBeGarbageCollected] to Event.idl

Source/modules/speech/SpeechRecognitionError.h

Index: Source/modules/speech/SpeechRecognitionError.h
diff --git a/Source/modules/speech/SpeechRecognitionError.h b/Source/modules/speech/SpeechRecognitionError.h
index 64c6c217d63bce07d2e3447a5344c6688f95ba4a..677b75c53757c229c6533c37ae5eabbb3055bc4e 100644
--- a/Source/modules/speech/SpeechRecognitionError.h
+++ b/Source/modules/speech/SpeechRecognitionError.h
@@ -55,9 +55,9 @@ public:
         ErrorCodeLanguageNotSupported = 8
     };
 
-    static PassRefPtr<SpeechRecognitionError> create(ErrorCode, const String&);
-    static PassRefPtr<SpeechRecognitionError> create();
-    static PassRefPtr<SpeechRecognitionError> create(const AtomicString&, const SpeechRecognitionErrorInit&);
+    static PassRefPtrWillBeRawPtr<SpeechRecognitionError> create(ErrorCode, const String&);
+    static PassRefPtrWillBeRawPtr<SpeechRecognitionError> create();
+    static PassRefPtrWillBeRawPtr<SpeechRecognitionError> create(const AtomicString&, const SpeechRecognitionErrorInit&);
 
     const String& error() { return m_error; }
     const String& message() { return m_message; }