Enumerate the return value of dispatchEvent so it is clear.

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

Index: third_party/WebKit/Source/core/events/GestureEvent.h
diff --git a/third_party/WebKit/Source/core/events/GestureEvent.h b/third_party/WebKit/Source/core/events/GestureEvent.h
index 0581cb37d43101c5511141bd39964db15c3f98a0..0f8c06c458f8629668e27e61854557219a39b546 100644
--- a/third_party/WebKit/Source/core/events/GestureEvent.h
+++ b/third_party/WebKit/Source/core/events/GestureEvent.h
@@ -58,8 +58,6 @@ public:
     GestureSource source() const { return m_source; }
     int resendingPluginId() const { return m_resendingPluginId; }
 
-    PassRefPtrWillBeRawPtr<EventDispatchMediator> createMediator() override;
-
     DECLARE_VIRTUAL_TRACE();
 
 private:
@@ -76,21 +74,6 @@ private:
     int m_resendingPluginId;
 };
 
-class GestureEventDispatchMediator final : public EventDispatchMediator {
-public:
-    static PassRefPtrWillBeRawPtr<GestureEventDispatchMediator> create(PassRefPtrWillBeRawPtr<GestureEvent> gestureEvent)
-    {
-        return adoptRefWillBeNoop(new GestureEventDispatchMediator(gestureEvent));
-    }
-
-private:
-    explicit GestureEventDispatchMediator(PassRefPtrWillBeRawPtr<GestureEvent>);
-
-    GestureEvent& event() const;
-
-    bool dispatchEvent(EventDispatcher&) const override;
-};
-
 DEFINE_EVENT_TYPE_CASTS(GestureEvent);
 
 } // namespace blink