ServiceWorker: Factor out FetchEvent related logics from RespondWithObserver.

third_party/WebKit/Source/modules/serviceworkers/ForeignFetchRespondWithObserver.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ForeignFetchRespondWithObserver_h
 #define ForeignFetchRespondWithObserver_h
 
-#include "modules/serviceworkers/RespondWithObserver.h"
+#include "modules/serviceworkers/FetchRespondWithObserver.h"
 
 namespace blink {
 
 // This class observes the service worker's handling of a ForeignFetchEvent and
 // notifies the client.
 class MODULES_EXPORT ForeignFetchRespondWithObserver final
-    : public RespondWithObserver {
+    : public FetchRespondWithObserver {
  public:
   static ForeignFetchRespondWithObserver* create(
       ExecutionContext*,
       int eventID,
       const KURL& requestURL,
       WebURLRequest::FetchRequestMode,
       WebURLRequest::FetchRedirectMode,
       WebURLRequest::FrameType,
       WebURLRequest::RequestContext,
       PassRefPtr<SecurityOrigin>,
@@ skipping 11 matching lines @@
                                   WebURLRequest::RequestContext,
                                   PassRefPtr<SecurityOrigin>,
                                   WaitUntilObserver*);
 
   RefPtr<SecurityOrigin> m_requestOrigin;
 };
 
 }  // namespace blink
 
 #endif  // ForeignFetchRespondWithObserver_h