Move Fetch API releted code to modules/fetch.

Source/modules/serviceworkers/FetchEvent.cpp

 // Copyright 2014 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.
 
 #include "config.h"
 #include "FetchEvent.h"
 
-#include "modules/serviceworkers/Request.h"
+#include "modules/fetch/Request.h"
 #include "modules/serviceworkers/ServiceWorkerGlobalScope.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
 PassRefPtrWillBeRawPtr<FetchEvent> FetchEvent::create()
 {
     return adoptRefWillBeNoop(new FetchEvent());
 }
 
@@ skipping 42 matching lines @@
 }
 
 void FetchEvent::trace(Visitor* visitor)
 {
     visitor->trace(m_request);
     visitor->trace(m_observer);
     Event::trace(visitor);
 }
 
 } // namespace blink