Make ServiceWorkerFetchRequest and ServiceWorkerResponse header maps case insensitive

content/browser/service_worker/embedded_worker_test_helper.cc

Index: content/browser/service_worker/embedded_worker_test_helper.cc
diff --git a/content/browser/service_worker/embedded_worker_test_helper.cc b/content/browser/service_worker/embedded_worker_test_helper.cc
index 97adcf172536d59fb9b76d43c43245026e0882bd..bfc57bcf854d959bb629c2b571bb2e41b22f0058 100644
--- a/content/browser/service_worker/embedded_worker_test_helper.cc
+++ b/content/browser/service_worker/embedded_worker_test_helper.cc
@@ -143,16 +143,12 @@ void EmbeddedWorkerTestHelper::OnFetchEvent(
     int embedded_worker_id,
     int request_id,
     const ServiceWorkerFetchRequest& request) {
-  SimulateSend(
-      new ServiceWorkerHostMsg_FetchEventFinished(
-          embedded_worker_id,
-          request_id,
-          SERVICE_WORKER_FETCH_EVENT_RESULT_RESPONSE,
-          ServiceWorkerResponse(GURL(""),
-                                200,
-                                "OK",
-                                std::map<std::string, std::string>(),
-                                std::string())));
+  SimulateSend(new ServiceWorkerHostMsg_FetchEventFinished(
+      embedded_worker_id,
+      request_id,
+      SERVICE_WORKER_FETCH_EVENT_RESULT_RESPONSE,
+      ServiceWorkerResponse(
+          GURL(""), 200, "OK", ServiceWorkerHeaderMap(), std::string())));
 }
 
 void EmbeddedWorkerTestHelper::SimulatePausedAfterDownload(