Enumerate the return value of dispatchEvent so it is clear.

third_party/WebKit/Source/core/events/DragEvent.cpp

 // Copyright 2015 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 "core/events/DragEvent.h"
 
 #include "core/clipboard/DataTransfer.h"
 #include "core/dom/Element.h"
 #include "core/events/EventDispatcher.h"
 
@@ skipping 76 matching lines @@
 DragEventDispatchMediator::DragEventDispatchMediator(PassRefPtrWillBeRawPtr<DragEvent> dragEvent)
     : EventDispatchMediator(dragEvent)
 {
 }
 
 DragEvent& DragEventDispatchMediator::event() const
 {
     return toDragEvent(EventDispatchMediator::event());
 }
 
-bool DragEventDispatchMediator::dispatchEvent(EventDispatcher& dispatcher) const
+DispatchEventResult DragEventDispatchMediator::dispatchEvent(EventDispatcher& dispatcher) const
 {
     event().eventPath().adjustForRelatedTarget(dispatcher.node(), event().relatedTarget());
     return EventDispatchMediator::dispatchEvent(dispatcher);
 }
 
 } // namespace blink