Add a blob field to ServiceWorkerFetchResponse and read the blob

content/renderer/service_worker/embedded_worker_context_client.cc

Index: content/renderer/service_worker/embedded_worker_context_client.cc
diff --git a/content/renderer/service_worker/embedded_worker_context_client.cc b/content/renderer/service_worker/embedded_worker_context_client.cc
index d6c4d17882c5dd6bd4083a149c3ac349850100eb..d8f9e36b70c8084473f531c9b3770b39394db9d0 100644
--- a/content/renderer/service_worker/embedded_worker_context_client.cc
+++ b/content/renderer/service_worker/embedded_worker_context_client.cc
@@ -258,13 +258,15 @@ void EmbeddedWorkerContextClient::didHandleFetchEvent(
   }
   ServiceWorkerResponse response(web_response.status(),
                                  web_response.statusText().utf8(),
-                                 headers);
+                                 headers,
+                                 std::string());
 #else
   // TODO(kinuko): Cleanup this once blink side patch is rolled.
   ServiceWorkerResponse response(web_response.statusCode(),
                                  web_response.statusText().utf8(),
                                  web_response.method().utf8(),
-                                 std::map<std::string, std::string>());
+                                 std::map<std::string, std::string>(),
+                                 std::string());
 #endif
   script_context_->DidHandleFetchEvent(
       request_id, SERVICE_WORKER_FETCH_EVENT_RESULT_RESPONSE, response);