Add [WillBeGarbageCollected] to Event.idl

Source/core/events/ResourceProgressEvent.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 26 matching lines @@
 
 // ResourceProgressEvent is a non-standard class that is simply a ProgressEvent
 // with an additional read-only "url" property containing a string URL. This is
 // used by the Chromium NaCl integration to indicate to which resource the
 // event applies. This is useful because the NaCl integration will download
 // (and translate in the case of PNaCl) multiple binary files. It is not
 // constructable by web content at all, and so does not provide the usual
 // EventInit pattern for Event construction.
 class ResourceProgressEvent FINAL : public ProgressEvent {
 public:
-    static PassRefPtr<ResourceProgressEvent> create()
+    static PassRefPtrWillBeRawPtr<ResourceProgressEvent> create()
     {
-        return adoptRef(new ResourceProgressEvent);
+        return adoptRefWillBeRefCountedGarbageCollected(new ResourceProgressEvent);
     }
-    static PassRefPtr<ResourceProgressEvent> create(const AtomicString& type, bool lengthComputable, unsigned long long loaded, unsigned long long total, const String& url)
+    static PassRefPtrWillBeRawPtr<ResourceProgressEvent> create(const AtomicString& type, bool lengthComputable, unsigned long long loaded, unsigned long long total, const String& url)
     {
-        return adoptRef(new ResourceProgressEvent(type, lengthComputable, loaded, total, url));
+        return adoptRefWillBeRefCountedGarbageCollected(new ResourceProgressEvent(type, lengthComputable, loaded, total, url));
     }
 
     const String& url() const;
 
     virtual const AtomicString& interfaceName() const OVERRIDE;
 
     virtual void trace(Visitor*) OVERRIDE;
 
 protected:
     ResourceProgressEvent();
     ResourceProgressEvent(const AtomicString& type, bool lengthComputable, unsigned long long loaded, unsigned long long total, const String& url);
 
 private:
     String m_url;
 };
 
 } // namespace WebCore
 
 #endif // ResourceProgressEvent_h