Revert "Add [WillBeGarbageCollected] to Event.idl"

Source/modules/serviceworkers/FetchEvent.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "FetchEvent.h"
 
 #include "core/events/ThreadLocalEventNames.h"
 #include "modules/serviceworkers/ServiceWorkerGlobalScope.h"
 #include "wtf/RefPtr.h"
 
 namespace WebCore {
 
-PassRefPtrWillBeRawPtr<FetchEvent> FetchEvent::create()
+PassRefPtr<FetchEvent> FetchEvent::create()
 {
-    return adoptRefWillBeRefCountedGarbageCollected(new FetchEvent());
+    return adoptRef(new FetchEvent());
 }
 
-PassRefPtrWillBeRawPtr<FetchEvent> FetchEvent::create(PassRefPtr<RespondWithObserver> observer)
+PassRefPtr<FetchEvent> FetchEvent::create(PassRefPtr<RespondWithObserver> observer)
 {
-    return adoptRefWillBeRefCountedGarbageCollected(new FetchEvent(observer));
+    return adoptRef(new FetchEvent(observer));
 }
 
 void FetchEvent::respondWith(const ScriptValue& value)
 {
     m_observer->respondWith(value);
 }
 
 const AtomicString& FetchEvent::interfaceName() const
 {
     return EventNames::FetchEvent;
 }
 
 FetchEvent::FetchEvent()
 {
     ScriptWrappable::init(this);
 }
 
 FetchEvent::FetchEvent(PassRefPtr<RespondWithObserver> observer)
     : Event(EventTypeNames::fetch, /*canBubble=*/false, /*cancelable=*/true)
     , m_observer(observer)
 {
     ScriptWrappable::init(this);
 }
 
-void FetchEvent::trace(Visitor* visitor)
-{
-    Event::trace(visitor);
-}
-
 } // namespace WebCore