Enumerate the return value of dispatchEvent so it is clear.

third_party/WebKit/Source/modules/notifications/Notification.cpp

 /*
  * 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 334 matching lines @@
 
 size_t Notification::maxActions()
 {
     // Returns a fixed number for unit tests, which run without the availability of the Platform object.
     if (!notificationManager())
         return 2;
 
     return notificationManager()->maxActions();
 }
 
-bool Notification::dispatchEventInternal(PassRefPtrWillBeRawPtr<Event> event)
+DispatchEventResult Notification::dispatchEventInternal(PassRefPtrWillBeRawPtr<Event> event)
 {
     ASSERT(executionContext()->isContextThread());
     return EventTarget::dispatchEventInternal(event);
 }
 
 const AtomicString& Notification::interfaceName() const
 {
     return EventTargetNames::Notification;
 }
 
@@ skipping 12 matching lines @@
 }
 
 DEFINE_TRACE(Notification)
 {
     visitor->trace(m_asyncRunner);
     RefCountedGarbageCollectedEventTargetWithInlineData<Notification>::trace(visitor);
     ActiveDOMObject::trace(visitor);
 }
 
 } // namespace blink