Use fetch_event_id (fetchEventID in blink) for FetchEvent

third_party/WebKit/public/web/modules/serviceworker/WebServiceWorkerContextProxy.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 50 matching lines @@
       const WebMessagePortChannelArray&,
       const WebServiceWorkerClientInfo&) = 0;
   virtual void dispatchExtendableMessageEvent(
       int eventID,
       const WebString& message,
       const WebSecurityOrigin& sourceOrigin,
       const WebMessagePortChannelArray&,
       std::unique_ptr<WebServiceWorker::Handle>) = 0;
   virtual void dispatchInstallEvent(int eventID) = 0;
   virtual void dispatchFetchEvent(
-      int responseID,
-      int eventFinishID,
+      int fetchEventID,
       const WebServiceWorkerRequest& webRequest) = 0;
   virtual void dispatchForeignFetchEvent(
-      int responseID,
-      int eventFinishID,
+      int fetchEventID,
       const WebServiceWorkerRequest& webRequest) = 0;
   virtual void dispatchNotificationClickEvent(int eventID,
                                               const WebString& notificationID,
                                               const WebNotificationData&,
                                               int actionIndex) = 0;
   virtual void dispatchNotificationCloseEvent(int eventID,
                                               const WebString& notificationID,
                                               const WebNotificationData&) = 0;
   virtual void dispatchPushEvent(int eventID, const WebString& data) = 0;
 
   virtual bool hasFetchEventHandler() = 0;
 
   enum LastChanceOption { IsNotLastChance, IsLastChance };
 
   // Once the ServiceWorker has finished handling the sync event,
   // didHandleSyncEvent is called on the context client.
   virtual void dispatchSyncEvent(int syncEventID,
                                  const WebString& tag,
                                  LastChanceOption) = 0;
 };
 
 }  // namespace blink
 
 #endif  // WebServiceWorkerContextProxy_h