Add [WillBeGarbageCollected] to Event.idl

Source/core/events/ErrorEvent.h

Index: Source/core/events/ErrorEvent.h
diff --git a/Source/core/events/ErrorEvent.h b/Source/core/events/ErrorEvent.h
index cd1be4d864df7952b900225550fe075f60630848..b65988a975f0013bdce07470bc9963d36ccea229 100644
--- a/Source/core/events/ErrorEvent.h
+++ b/Source/core/events/ErrorEvent.h
@@ -49,17 +49,17 @@ struct ErrorEventInit : public EventInit {
 
 class ErrorEvent FINAL : public Event {
 public:
-    static PassRefPtr<ErrorEvent> create()
+    static PassRefPtrWillBeRawPtr<ErrorEvent> create()
     {
-        return adoptRef(new ErrorEvent);
+        return adoptRefCountedWillBeRefCountedGarbageCollected(new ErrorEvent);
     }
-    static PassRefPtr<ErrorEvent> create(const String& message, const String& fileName, unsigned lineNumber, unsigned columnNumber, PassRefPtr<DOMWrapperWorld> world)
+    static PassRefPtrWillBeRawPtr<ErrorEvent> create(const String& message, const String& fileName, unsigned lineNumber, unsigned columnNumber, PassRefPtr<DOMWrapperWorld> world)
     {
-        return adoptRef(new ErrorEvent(message, fileName, lineNumber, columnNumber, world));
+        return adoptRefCountedWillBeRefCountedGarbageCollected(new ErrorEvent(message, fileName, lineNumber, columnNumber, world));
     }
-    static PassRefPtr<ErrorEvent> create(const AtomicString& type, const ErrorEventInit& initializer)
+    static PassRefPtrWillBeRawPtr<ErrorEvent> create(const AtomicString& type, const ErrorEventInit& initializer)
     {
-        return adoptRef(new ErrorEvent(type, initializer));
+        return adoptRefCountedWillBeRefCountedGarbageCollected(new ErrorEvent(type, initializer));
     }
     static PassRefPtr<ErrorEvent> createSanitizedError(PassRefPtr<DOMWrapperWorld> world)
     {