Enumerate the return value of dispatchEvent so it is clear.

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

Index: third_party/WebKit/Source/core/events/TouchEvent.h
diff --git a/third_party/WebKit/Source/core/events/TouchEvent.h b/third_party/WebKit/Source/core/events/TouchEvent.h
index 578d15de1f8a285ed5c32245ebb928abc5fd6bec..942aac0c151f11f8172b9b82c252823eb32c3da4 100644
--- a/third_party/WebKit/Source/core/events/TouchEvent.h
+++ b/third_party/WebKit/Source/core/events/TouchEvent.h
@@ -108,7 +108,7 @@ public:
 private:
     explicit TouchEventDispatchMediator(PassRefPtrWillBeRawPtr<TouchEvent>);
     TouchEvent& event() const;
-    bool dispatchEvent(EventDispatcher&) const override;
+    DispatchEventResult dispatchEvent(EventDispatcher&) const override;
 };
 
 DEFINE_EVENT_TYPE_CASTS(TouchEvent);