Enumerate the return value of dispatchEvent so it is clear.

third_party/WebKit/Source/core/events/EventDispatcher.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #ifndef EventDispatcher_h
 #define EventDispatcher_h
 
 #include "core/dom/SimulatedClickOptions.h"
+#include "core/events/EventDispatchResult.h"
 #include "platform/heap/Handle.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
 class Event;
 class EventDispatchMediator;
 class FrameView;
 class Node;
 class NodeEventContext;
 class WindowEventContext;
 
 enum EventDispatchContinuation {
     ContinueDispatching,
     DoneDispatching
 };
 
 class EventDispatcher {
     STACK_ALLOCATED();
 public:
-    static bool dispatchEvent(Node&, PassRefPtrWillBeRawPtr<EventDispatchMediator>);
+    static DispatchEventResult dispatchEvent(Node&, PassRefPtrWillBeRawPtr<EventDispatchMediator>);
     static void dispatchScopedEvent(Node&, PassRefPtrWillBeRawPtr<EventDispatchMediator>);
 
     static void dispatchSimulatedClick(Node&, Event* underlyingEvent, SimulatedClickMouseEventOptions, SimulatedClickCreationScope);
 
-    bool dispatch();
+    DispatchEventResult dispatch();
     Node& node() const { return *m_node; }
     Event& event() const { return *m_event; }
 
 private:
     EventDispatcher(Node&, PassRefPtrWillBeRawPtr<Event>);
 
     EventDispatchContinuation dispatchEventPreProcess(void*& preDispatchEventHandlerResult);
     EventDispatchContinuation dispatchEventAtCapturing();
     EventDispatchContinuation dispatchEventAtTarget();
     void dispatchEventAtBubbling();
     void dispatchEventPostProcess(void* preDispatchEventHandlerResult);
 
     RefPtrWillBeMember<Node> m_node;
     RefPtrWillBeMember<Event> m_event;
     RefPtrWillBeMember<FrameView> m_view;
 #if ENABLE(ASSERT)
     bool m_eventDispatched;
 #endif
 };
 
 } // namespace blink
 
 #endif