Add [WillBeGarbageCollected] to Event.idl

Source/modules/serviceworkers/FetchEvent.cpp

Index: Source/modules/serviceworkers/FetchEvent.cpp
diff --git a/Source/modules/serviceworkers/FetchEvent.cpp b/Source/modules/serviceworkers/FetchEvent.cpp
index 3f39213d26b7a6d336c80dcdbaa6d026e90b2db8..036055f8f7f7257b3744dbdecc3d67a8828812b0 100644
--- a/Source/modules/serviceworkers/FetchEvent.cpp
+++ b/Source/modules/serviceworkers/FetchEvent.cpp
@@ -11,14 +11,14 @@
 
 namespace WebCore {
 
-PassRefPtr<FetchEvent> FetchEvent::create()
+PassRefPtrWillBeRawPtr<FetchEvent> FetchEvent::create()
 {
-    return adoptRef(new FetchEvent());
+    return adoptRefWillBeRefCountedGarbageCollected(new FetchEvent());
 }
 
-PassRefPtr<FetchEvent> FetchEvent::create(PassRefPtr<RespondWithObserver> observer)
+PassRefPtrWillBeRawPtr<FetchEvent> FetchEvent::create(PassRefPtr<RespondWithObserver> observer)
 {
-    return adoptRef(new FetchEvent(observer));
+    return adoptRefWillBeRefCountedGarbageCollected(new FetchEvent(observer));
 }
 
 void FetchEvent::respondWith(const ScriptValue& value)
@@ -43,4 +43,9 @@ FetchEvent::FetchEvent(PassRefPtr<RespondWithObserver> observer)
     ScriptWrappable::init(this);
 }
 
+void FetchEvent::trace(Visitor* visitor)
+{
+    Event::trace(visitor);
+}
+
 } // namespace WebCore