Add [WillBeGarbageCollected] to Event.idl

Source/core/events/AutocompleteErrorEvent.h

Index: Source/core/events/AutocompleteErrorEvent.h
diff --git a/Source/core/events/AutocompleteErrorEvent.h b/Source/core/events/AutocompleteErrorEvent.h
index 26e4456638679b3fe0f2e6f345dc80001a905583..261b2c4dc18bf669bcfdcd73e051ddf081f4eb21 100644
--- a/Source/core/events/AutocompleteErrorEvent.h
+++ b/Source/core/events/AutocompleteErrorEvent.h
@@ -35,19 +35,19 @@ struct AutocompleteErrorEventInit : public EventInit {
 
 class AutocompleteErrorEvent FINAL : public Event {
 public:
-    static PassRefPtr<AutocompleteErrorEvent> create()
+    static PassRefPtrWillBeRawPtr<AutocompleteErrorEvent> create()
     {
-        return adoptRef(new AutocompleteErrorEvent);
+        return adoptRefWillBeRefCountedGarbageCollected(new AutocompleteErrorEvent);
     }
 
-    static PassRefPtr<AutocompleteErrorEvent> create(const String& reason)
+    static PassRefPtrWillBeRawPtr<AutocompleteErrorEvent> create(const String& reason)
     {
-        return adoptRef(new AutocompleteErrorEvent(reason));
+        return adoptRefWillBeRefCountedGarbageCollected(new AutocompleteErrorEvent(reason));
     }
 
-    static PassRefPtr<AutocompleteErrorEvent> create(const AtomicString& eventType, const AutocompleteErrorEventInit& initializer)
+    static PassRefPtrWillBeRawPtr<AutocompleteErrorEvent> create(const AtomicString& eventType, const AutocompleteErrorEventInit& initializer)
     {
-        return adoptRef(new AutocompleteErrorEvent(eventType, initializer));
+        return adoptRefWillBeRefCountedGarbageCollected(new AutocompleteErrorEvent(eventType, initializer));
     }
 
     const String& reason() const { return m_reason; }