Refactoring: service worker: Factor out some duplicated code.

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 9ee4a60fb3cd4108fd457e22d26216edfd94431f..5792d3d4abc0c7ea804a48a44c65a301eb2c0350 100644
--- a/content/browser/service_worker/service_worker_url_request_job.h
+++ b/content/browser/service_worker/service_worker_url_request_job.h
@@ -8,6 +8,7 @@
 #include <stdint.h>
 
 #include <map>
+#include <memory>
 #include <string>
 
 #include "base/macros.h"
@@ -195,6 +196,7 @@ class CONTENT_EXPORT ServiceWorkerURLRequestJob
       ServiceWorkerFetchEventResult fetch_result,
       const ServiceWorkerResponse& response,
       const scoped_refptr<ServiceWorkerVersion>& version);
+  void SetResponse(const ServiceWorkerResponse& response);
 
   // Populates |http_response_headers_|.
   void CreateResponseHeader(int status_code,