Enumerate the return value of dispatchEvent so it is clear.

third_party/WebKit/Source/web/ServiceWorkerGlobalScopeProxy.cpp

Index: third_party/WebKit/Source/web/ServiceWorkerGlobalScopeProxy.cpp
diff --git a/third_party/WebKit/Source/web/ServiceWorkerGlobalScopeProxy.cpp b/third_party/WebKit/Source/web/ServiceWorkerGlobalScopeProxy.cpp
index 5ed7d7f1fe78a32333662b9cbebb869fefdb26ef..29b6548182c7e3beae11dda8a3d631f526ea591a 100644
--- a/third_party/WebKit/Source/web/ServiceWorkerGlobalScopeProxy.cpp
+++ b/third_party/WebKit/Source/web/ServiceWorkerGlobalScopeProxy.cpp
@@ -106,7 +106,6 @@ void ServiceWorkerGlobalScopeProxy::dispatchActivateEvent(int eventID)
 void ServiceWorkerGlobalScopeProxy::dispatchFetchEvent(int eventID, const WebServiceWorkerRequest& webRequest)
 {
     RespondWithObserver* observer = RespondWithObserver::create(workerGlobalScope(), eventID, webRequest.url(), webRequest.mode(), webRequest.frameType(), webRequest.requestContext());
-    bool defaultPrevented = false;
     Request* request = Request::create(workerGlobalScope(), webRequest);
     request->headers()->setGuard(Headers::ImmutableGuard);
     FetchEventInit eventInit;
@@ -114,8 +113,8 @@ void ServiceWorkerGlobalScopeProxy::dispatchFetchEvent(int eventID, const WebSer
     eventInit.setRequest(request);
     eventInit.setIsReload(webRequest.isReload());
     RefPtrWillBeRawPtr<FetchEvent> fetchEvent(FetchEvent::create(EventTypeNames::fetch, eventInit, observer));
-    defaultPrevented = !workerGlobalScope()->dispatchEvent(fetchEvent.release());
-    observer->didDispatchEvent(defaultPrevented);
+    WebInputEventResult eventResult = workerGlobalScope()->dispatchEvent(fetchEvent.release());
+    observer->didDispatchEvent(eventResult != WebInputEventResult::NotHandled);

[tkent, 2015/12/03 00:36:25]

Can we change the argument of RespondWithObserver to WebInputEventResult? or add
a TODO comment?

[dtapuska, 2015/12/03 02:00:53]

Done.

 }
 
 void ServiceWorkerGlobalScopeProxy::dispatchGeofencingEvent(int eventID, WebGeofencingEventType eventType, const WebString& regionID, const WebCircularGeofencingRegion& region)