Enumerate the return value of dispatchEvent so it is clear.

third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 1366 matching lines @@
     // This is a DOM extension and is independent of bubbling/capturing rules of
     // the DOM.
     FrameOwner* owner = frame() ? frame()->owner() : nullptr;
     if (owner)
         owner->dispatchLoad();
 
     TRACE_EVENT_INSTANT1("devtools.timeline", "MarkLoad", TRACE_EVENT_SCOPE_THREAD, "data", InspectorMarkLoadEvent::data(frame()));
     InspectorInstrumentation::loadEventFired(frame());
 }
 
-bool LocalDOMWindow::dispatchEvent(PassRefPtrWillBeRawPtr<Event> prpEvent, PassRefPtrWillBeRawPtr<EventTarget> prpTarget)
+DispatchEventResult LocalDOMWindow::dispatchEvent(PassRefPtrWillBeRawPtr<Event> prpEvent, PassRefPtrWillBeRawPtr<EventTarget> prpTarget)
 {
     ASSERT(!EventDispatchForbiddenScope::isEventDispatchForbidden());
 
     RefPtrWillBeRawPtr<EventTarget> protect(this);
     RefPtrWillBeRawPtr<Event> event = prpEvent;
 
     event->setTrusted(true);
     event->setTarget(prpTarget ? prpTarget : this);
     event->setCurrentTarget(this);
     event->setEventPhase(Event::AT_TARGET);
@@ skipping 121 matching lines @@
 {
     // If the LocalDOMWindow still has a frame reference, that frame must point
     // back to this LocalDOMWindow: otherwise, it's easy to get into a situation
     // where script execution leaks between different LocalDOMWindows.
     if (m_frameObserver->frame())
         ASSERT_WITH_SECURITY_IMPLICATION(m_frameObserver->frame()->domWindow() == this);
     return m_frameObserver->frame();
 }
 
 } // namespace blink