Use request initiator to check for cross origin requests.

content/browser/service_worker/service_worker_url_request_job.cc

 // 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 "content/browser/service_worker/service_worker_url_request_job.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <limits>
 #include <map>
@@ skipping 586 matching lines @@
 
   if (fetch_result == SERVICE_WORKER_FETCH_EVENT_RESULT_FALLBACK) {
     ServiceWorkerMetrics::RecordFallbackedRequestMode(request_mode_);
     // When the request_mode is |CORS| or |CORS-with-forced-preflight| and the
     // origin of the request URL is different from the security origin of the
     // document, we can't simply fallback to the network in the browser process.
     // It is because the CORS preflight logic is implemented in the renderer. So
     // we returns a fall_back_required response to the renderer.
     if ((request_mode_ == FETCH_REQUEST_MODE_CORS ||
          request_mode_ == FETCH_REQUEST_MODE_CORS_WITH_FORCED_PREFLIGHT) &&
-        delegate_->GetRequestingOrigin() != request()->url().GetOrigin()) {
+        !request()->initiator().IsSameOriginWith(
+            url::Origin(request()->url()))) {
       fall_back_required_ = true;
       RecordResult(ServiceWorkerMetrics::REQUEST_JOB_FALLBACK_FOR_CORS);
       CreateResponseHeader(
           400, "Service Worker Fallback Required", ServiceWorkerHeaderMap());
       CommitResponseHeader();
       return;
     }
     // Change the response type and restart the request to fallback to
     // the network.
     RecordResult(ServiceWorkerMetrics::REQUEST_JOB_FALLBACK_RESPONSE);
@@ skipping 210 matching lines @@
         base::TimeTicks() /* service_worker_ready_time */);
     return;
   }
   delegate_->OnStartCompleted(true /* was_fetched_via_service_worker */,
                               fall_back_required_, response_url_,
                               service_worker_response_type_, worker_start_time_,
                               worker_ready_time_);
 }
 
 }  // namespace content