Use request initiator to check for cross origin requests.

content/browser/service_worker/service_worker_url_request_job.h

Index: content/browser/service_worker/service_worker_url_request_job.h
diff --git a/content/browser/service_worker/service_worker_url_request_job.h b/content/browser/service_worker/service_worker_url_request_job.h
index 8f9946d4547c1c7f8dc2e516b68d8d4dd31cad33..904e098ca87225b1bf666e6ccd2140ef649b9c86 100644
--- a/content/browser/service_worker/service_worker_url_request_job.h
+++ b/content/browser/service_worker/service_worker_url_request_job.h
@@ -92,9 +92,6 @@ class CONTENT_EXPORT ServiceWorkerURLRequestJob
     // Called to signal that loading failed, and that the resource being loaded
     // was a main resource.
     virtual void MainResourceLoadFailed() {}
-
-    // Returns the origin of the page/context which initiated this request.
-    virtual GURL GetRequestingOrigin() = 0;
   };
 
   ServiceWorkerURLRequestJob(