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 3e81924eff185ff6dd8f27b1be41f7cffa4a4a5f..dd65519e4b3a1ebbd6fe9a50b4c73a3adb0d0a7e 100644
--- a/Source/modules/speech/SpeechRecognitionError.h
+++ b/Source/modules/speech/SpeechRecognitionError.h
@@ -55,15 +55,17 @@ 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; }
 
     virtual const AtomicString& interfaceName() const OVERRIDE;
 
+    virtual void trace(Visitor*) OVERRIDE { }
+
 private:
     SpeechRecognitionError(const String&, const String&);
     SpeechRecognitionError(const AtomicString&, const SpeechRecognitionErrorInit&);