Introduce url_list to the Response scheme of CacheStorage.

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 020842dd18f9eef8ec65562731d3a97bf9d15121..33320e1b9b940a358e60f6458e83fc2331910bb0 100644
--- a/content/browser/service_worker/service_worker_url_request_job.h
+++ b/content/browser/service_worker/service_worker_url_request_job.h
@@ -10,6 +10,7 @@
 #include <map>
 #include <memory>
 #include <string>
+#include <vector>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
@@ -245,7 +246,7 @@ class CONTENT_EXPORT ServiceWorkerURLRequestJob : public net::URLRequestJob {
   std::unique_ptr<net::HttpResponseInfo> http_response_info_;
   // Headers that have not yet been committed to |http_response_info_|.
   scoped_refptr<net::HttpResponseHeaders> http_response_headers_;
-  GURL response_url_;
+  std::vector<GURL> response_url_list_;
   blink::WebServiceWorkerResponseType service_worker_response_type_;
 
   // Used when response type is FORWARD_TO_SERVICE_WORKER.