Enumerate the return value of dispatchEvent so it is clear.

third_party/WebKit/Source/core/dom/Node.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) 2004-2011, 2014 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * 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
@@ skipping 623 matching lines @@
     // Handlers to do/undo actions on the target node before an event is dispatched to it and after the event
     // has been dispatched.  The data pointer is handed back by the preDispatch and passed to postDispatch.
     virtual void* preDispatchEventHandler(Event*) { return nullptr; }
     virtual void postDispatchEventHandler(Event*, void* /*dataFromPreDispatch*/) { }
 
     void dispatchScopedEvent(PassRefPtrWillBeRawPtr<Event>);
 
     virtual void handleLocalEvents(Event&);
 
     void dispatchSubtreeModifiedEvent();
-    bool dispatchDOMActivateEvent(int detail, PassRefPtrWillBeRawPtr<Event> underlyingEvent);
+    DispatchEventResult dispatchDOMActivateEvent(int detail, PassRefPtrWillBeRawPtr<Event> underlyingEvent);
 
-    bool dispatchMouseEvent(const PlatformMouseEvent&, const AtomicString& eventType, int clickCount = 0, Node* relatedTarget = nullptr);
+    DispatchEventResult dispatchMouseEvent(const PlatformMouseEvent&, const AtomicString& eventType, int clickCount = 0, Node* relatedTarget = nullptr);
 
     void dispatchSimulatedClick(Event* underlyingEvent, SimulatedClickMouseEventOptions = SendNoEvents, SimulatedClickCreationScope = SimulatedClickCreationScope::FromUserAgent);
 
     void dispatchInputEvent();
 
     // Perform the default action for an event.
     virtual void defaultEventHandler(Event*);
     virtual void willCallDefaultEventHandler(const Event&);
 
     EventTargetData* eventTargetData() override;
@@ skipping 97 matching lines @@
         CreateInsertionPoint = CreateHTMLElement | IsInsertionPointFlag,
         CreateEditingText = CreateText | HasNameOrIsEditingTextFlag,
     };
 
     Node(TreeScope*, ConstructionType);
 
     virtual void didMoveToNewDocument(Document& oldDocument);
 
     bool addEventListenerInternal(const AtomicString& eventType, PassRefPtrWillBeRawPtr<EventListener>, const EventListenerOptions&) override;
     bool removeEventListenerInternal(const AtomicString& eventType, PassRefPtrWillBeRawPtr<EventListener>, const EventListenerOptions&) override;
-    bool dispatchEventInternal(PassRefPtrWillBeRawPtr<Event>) override;
+    DispatchEventResult dispatchEventInternal(PassRefPtrWillBeRawPtr<Event>) override;
 
     static void reattachWhitespaceSiblingsIfNeeded(Text* start);
 
 #if !ENABLE(OILPAN)
     void willBeDeletedFromDocument();
 #endif
 
     bool hasRareData() const { return getFlag(HasRareDataFlag); }
 
     NodeRareData* rareData() const;
@@ skipping 153 matching lines @@
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showNode(const blink::Node*);
 void showTree(const blink::Node*);
 void showNodePath(const blink::Node*);
 #endif
 
 #endif // Node_h