Enumerate the return value of dispatchEvent so it is clear.

third_party/WebKit/Source/core/events/WheelEvent.cpp

Index: third_party/WebKit/Source/core/events/WheelEvent.cpp
diff --git a/third_party/WebKit/Source/core/events/WheelEvent.cpp b/third_party/WebKit/Source/core/events/WheelEvent.cpp
index 3300b8d31911f27a1290ee7b0cf771db40a6e497..f7051f1d99bee945a7742f59785e42b36c8cb39d 100644
--- a/third_party/WebKit/Source/core/events/WheelEvent.cpp
+++ b/third_party/WebKit/Source/core/events/WheelEvent.cpp
@@ -106,7 +106,7 @@ bool WheelEvent::isWheelEvent() const
 
 PassRefPtrWillBeRawPtr<EventDispatchMediator> WheelEvent::createMediator()
 {
-    return WheelEventDispatchMediator::create(this);
+    return EventDispatchMediator::create(this);
 }
 
 DEFINE_TRACE(WheelEvent)
@@ -114,24 +114,4 @@ DEFINE_TRACE(WheelEvent)
     MouseEvent::trace(visitor);
 }
 
-PassRefPtrWillBeRawPtr<WheelEventDispatchMediator> WheelEventDispatchMediator::create(PassRefPtrWillBeRawPtr<WheelEvent> event)
-{
-    return adoptRefWillBeNoop(new WheelEventDispatchMediator(event));
-}
-
-WheelEventDispatchMediator::WheelEventDispatchMediator(PassRefPtrWillBeRawPtr<WheelEvent> event)
-    : EventDispatchMediator(event)
-{
-}
-
-WheelEvent& WheelEventDispatchMediator::event() const
-{
-    return toWheelEvent(EventDispatchMediator::event());
-}
-
-bool WheelEventDispatchMediator::dispatchEvent(EventDispatcher& dispatcher) const
-{
-    return EventDispatchMediator::dispatchEvent(dispatcher) && !event().defaultHandled();
-}
-
 } // namespace blink