Revert "Add [WillBeGarbageCollected] to Event.idl"

Source/core/events/EventFactory.h

Index: Source/core/events/EventFactory.h
diff --git a/Source/core/events/EventFactory.h b/Source/core/events/EventFactory.h
index 7ebbb5f741bd0c0b4cc160a3d1b70227e8fc15b3..2436e3f0000f3c2349f422ce5add870c5b0011aa 100644
--- a/Source/core/events/EventFactory.h
+++ b/Source/core/events/EventFactory.h
@@ -26,7 +26,6 @@
 #ifndef EventFactory_h
 #define EventFactory_h
 
-#include "heap/Handle.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/text/AtomicString.h"
 
@@ -36,7 +35,7 @@ class Event;
 
 class EventFactory {
 public:
-    static PassRefPtrWillBeRawPtr<Event> create(const String& eventType);
+    static PassRefPtr<Event> create(const String& eventType);
 };
 
 }