Use request initiator to check for cross origin requests.

content/browser/service_worker/service_worker_controllee_request_handler.h

 // 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.
 
 #ifndef CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTROLLEE_REQUEST_HANDLER_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTROLLEE_REQUEST_HANDLER_H_
 
 #include <stdint.h>
 
 #include "base/gtest_prod_util.h"
@@ skipping 89 matching lines @@
       const GURL& original_url_via_service_worker,
       blink::WebServiceWorkerResponseType response_type_via_service_worker,
       base::TimeTicks worker_start_time,
       base::TimeTicks service_worker_ready_time) override;
 
   ServiceWorkerVersion* GetServiceWorkerVersion(
       ServiceWorkerMetrics::URLRequestJobResult* result) override;
   bool RequestStillValid(
       ServiceWorkerMetrics::URLRequestJobResult* result) override;
   void MainResourceLoadFailed() override;
-  GURL GetRequestingOrigin() override;
 
   // Sets |job_| to nullptr, and clears all extra response info associated with
   // that job, except for timing information.
   void ClearJob();
 
   bool is_main_resource_load_;
   base::WeakPtr<ServiceWorkerURLRequestJob> job_;
   FetchRequestMode request_mode_;
   FetchCredentialsMode credentials_mode_;
   FetchRedirectMode redirect_mode_;
@@ skipping 18 matching lines @@
   base::TimeTicks service_worker_ready_time_;
 
   base::WeakPtrFactory<ServiceWorkerControlleeRequestHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerControlleeRequestHandler);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTROLLEE_REQUEST_HANDLER_H_