Enumerate the return value of dispatchEvent so it is clear.

third_party/WebKit/Source/core/page/ContextMenuController.cpp

 /*
  * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Igalia S.L
  *
  * 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 80 matching lines @@
 
     Node* node = event.target()->toNode();
     if (!node || !node->isHTMLElement())
         return;
 
     HTMLElement& element = toHTMLElement(*node);
     RefPtrWillBeRawPtr<HTMLMenuElement> menuElement = element.assignedContextMenu();
     if (!menuElement || !equalIgnoringCase(menuElement->fastGetAttribute(typeAttr), "context"))
         return;
     RefPtrWillBeRawPtr<RelatedEvent> relatedEvent = RelatedEvent::create(EventTypeNames::show, true, true, node);
-    if (!menuElement->dispatchEvent(relatedEvent.release()))
+    if (menuElement->dispatchEvent(relatedEvent.release()) != DispatchEventResult::NotCanceled)
         return;
     if (menuElement != element.assignedContextMenu())
         return;
     m_menuProvider = CustomContextMenuProvider::create(*menuElement, element);
     m_menuProvider->populateContextMenu(m_contextMenu.get());
 }
 
 void ContextMenuController::handleContextMenuEvent(Event* event)
 {
     m_contextMenu = createContextMenu(event);
@@ skipping 71 matching lines @@
     ASSERT(item->type() == ActionType || item->type() == CheckableActionType);
 
     if (item->action() < ContextMenuItemBaseCustomTag || item->action() > ContextMenuItemLastCustomTag)
         return;
 
     ASSERT(m_menuProvider);
     m_menuProvider->contextMenuItemSelected(item);
 }
 
 } // namespace blink