Enumerate the return value of dispatchEvent so it is clear.

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

Index: third_party/WebKit/Source/core/events/EventDispatcher.cpp
diff --git a/third_party/WebKit/Source/core/events/EventDispatcher.cpp b/third_party/WebKit/Source/core/events/EventDispatcher.cpp
index d069a1c9915fdbd64d5f4580fc562e9c1d86c480..09670070961b70af82fd9ab1f1511a864c1660fa 100644
--- a/third_party/WebKit/Source/core/events/EventDispatcher.cpp
+++ b/third_party/WebKit/Source/core/events/EventDispatcher.cpp
@@ -42,7 +42,7 @@
 
 namespace blink {
 
-bool EventDispatcher::dispatchEvent(Node& node, PassRefPtrWillBeRawPtr<EventDispatchMediator> mediator)
+WebInputEventResult EventDispatcher::dispatchEvent(Node& node, PassRefPtrWillBeRawPtr<EventDispatchMediator> mediator)
 {
     TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("blink.debug"), "EventDispatcher::dispatchEvent");
     ASSERT(!EventDispatchForbiddenScope::isEventDispatchForbidden());
@@ -102,7 +102,7 @@ void EventDispatcher::dispatchSimulatedClick(Node& node, Event* underlyingEvent,
     nodesDispatchingSimulatedClicks->remove(&node);
 }
 
-bool EventDispatcher::dispatch()
+WebInputEventResult EventDispatcher::dispatch()
 {
     TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("blink.debug"), "EventDispatcher::dispatch");
 
@@ -112,7 +112,7 @@ bool EventDispatcher::dispatch()
 #endif
     if (event().eventPath().isEmpty()) {
         // eventPath() can be empty if event path is shrinked by relataedTarget retargeting.
-        return true;
+        return WebInputEventResult::NotHandled;
     }
     m_event->eventPath().ensureWindowEventContext();
 
@@ -135,7 +135,7 @@ bool EventDispatcher::dispatch()
     m_event->setCurrentTarget(nullptr);
     TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "UpdateCounters", TRACE_EVENT_SCOPE_THREAD, "data", InspectorUpdateCountersEvent::data());
 
-    return !m_event->defaultPrevented();
+    return m_event->eventResult();
 }
 
 inline EventDispatchContinuation EventDispatcher::dispatchEventPreProcess(void*& preDispatchEventHandlerResult)