Modify the expected error message by add 'file:///'.

Bug: 902942
Change-Id: I4d3bf1c2b8d5c6aee0024f78219ef4ff097e98f6
Reviewed-on: https://chromium-review.googlesource.com/c/1325649
Commit-Queue: Clifford Cheng <cliffordcheng@chromium.org>
Commit-Queue: mark a. foltz <mfoltz@chromium.org>
Reviewed-by: mark a. foltz <mfoltz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#606351}

chrome/test/media_router/media_router_integration_ui_browsertest.cc

@@ -172,8 +172,9 @@ IN_PROC_BROWSER_TEST_F(MediaRouterIntegrationBrowserTest,
 
   std::string issue_title = GetIssueTitle();
   // TODO(imcheng): Fix host name for file schemes (crbug.com/560576).
-  ASSERT_EQ(l10n_util::GetStringFUTF8(
-                IDS_MEDIA_ROUTER_ISSUE_CREATE_ROUTE_TIMEOUT, base::string16()),
+  ASSERT_EQ(
+      l10n_util::GetStringFUTF8(IDS_MEDIA_ROUTER_ISSUE_CREATE_ROUTE_TIMEOUT,
+                                base::UTF8ToUTF16("file:///")),
       issue_title);
 
   // Route will still get created, it just takes longer than usual.