ServiceWorker: Factor out FetchEvent related logics from RespondWithObserver.

third_party/WebKit/Source/web/ServiceWorkerGlobalScopeProxy.cpp

 /*
  * 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 146 matching lines @@
 }
 
 void ServiceWorkerGlobalScopeProxy::dispatchFetchEvent(
     int fetchEventID,
     const WebServiceWorkerRequest& webRequest,
     bool navigationPreloadSent) {
   ScriptState::Scope scope(
       workerGlobalScope()->scriptController()->getScriptState());
   WaitUntilObserver* waitUntilObserver = WaitUntilObserver::create(
       workerGlobalScope(), WaitUntilObserver::Fetch, fetchEventID);
-  RespondWithObserver* respondWithObserver = RespondWithObserver::create(
+  RespondWithObserver* respondWithObserver = FetchRespondWithObserver::create(

[nhiroki, 2017/03/08 01:49:04]

Can you replace RespondWithObserver* with FetchRespondWithObserver*?

It'd be better to use the concrete class name instead of the base class name as
much as possible in terms of readability and compilability. If this change
affects wide areas, a separate CL is ok.

[zino, 2017/03/10 17:57:17]

Done.

       workerGlobalScope(), fetchEventID, webRequest.url(), webRequest.mode(),
       webRequest.redirectMode(), webRequest.frameType(),
       webRequest.requestContext(), waitUntilObserver);
   Request* request = Request::create(
       workerGlobalScope()->scriptController()->getScriptState(), webRequest);
   request->getHeaders()->setGuard(Headers::ImmutableGuard);
   FetchEventInit eventInit;
   eventInit.setCancelable(true);
   eventInit.setRequest(request);
   eventInit.setClientId(
@@ skipping 305 matching lines @@
   return *m_document;
 }
 
 ServiceWorkerGlobalScope* ServiceWorkerGlobalScopeProxy::workerGlobalScope()
     const {
   DCHECK(m_workerGlobalScope);
   return m_workerGlobalScope;
 }
 
 }  // namespace blink