Enumerate the return value of dispatchEvent so it is clear.

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

Index: third_party/WebKit/Source/core/events/EventTarget.h
diff --git a/third_party/WebKit/Source/core/events/EventTarget.h b/third_party/WebKit/Source/core/events/EventTarget.h
index 5f56ecb04adcf376f578f59ca61a2f76aede39e3..8c9e9e96b36acea69964697b9a0828717f4905f8 100644
--- a/third_party/WebKit/Source/core/events/EventTarget.h
+++ b/third_party/WebKit/Source/core/events/EventTarget.h
@@ -38,6 +38,7 @@
 #include "core/EventNames.h"
 #include "core/EventTargetNames.h"
 #include "core/EventTypeNames.h"
+#include "core/events/EventDispatchResult.h"
 #include "core/events/EventListenerMap.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Allocator.h"
@@ -45,8 +46,8 @@
 
 namespace blink {
 
-class LocalDOMWindow;
 class Event;
+class LocalDOMWindow;
 class ExceptionState;
 class MessagePort;
 class Node;
@@ -138,7 +139,7 @@ public:
     bool removeEventListener(const AtomicString& eventType, PassRefPtrWillBeRawPtr<EventListener>, EventListenerOptions&);
     virtual void removeAllEventListeners();
 
-    bool dispatchEvent(PassRefPtrWillBeRawPtr<Event>);
+    DispatchEventResult dispatchEvent(PassRefPtrWillBeRawPtr<Event>);
 
     // dispatchEventForBindings is intended to only be called from
     // javascript originated calls. This method will validate and may adjust
@@ -156,7 +157,9 @@ public:
     EventListenerVector* getEventListeners(const AtomicString& eventType);
     Vector<AtomicString> eventTypes();
 
-    bool fireEventListeners(Event*);
+    DispatchEventResult fireEventListeners(Event*);
+
+    static DispatchEventResult dispatchEventResult(const Event&);
 
     DEFINE_INLINE_VIRTUAL_TRACE() { }
 
@@ -167,7 +170,7 @@ protected:
 
     virtual bool addEventListenerInternal(const AtomicString& eventType, PassRefPtrWillBeRawPtr<EventListener>, const EventListenerOptions&);
     virtual bool removeEventListenerInternal(const AtomicString& eventType, PassRefPtrWillBeRawPtr<EventListener>, const EventListenerOptions&);
-    virtual bool dispatchEventInternal(PassRefPtrWillBeRawPtr<Event>);
+    virtual DispatchEventResult dispatchEventInternal(PassRefPtrWillBeRawPtr<Event>);
 
     // Subclasses should likely not override these themselves; instead, they should subclass EventTargetWithInlineData.
     virtual EventTargetData* eventTargetData() = 0;