[Media Router] Return NotFoundError on dialog exit if appropriate

chrome/test/media_router/media_router_integration_browsertest.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/test/media_router/media_router_integration_browsertest.h"
 
 #include "base/bind.h"
 #include "base/files/file_util.h"
 #include "base/json/json_file_value_serializer.h"
 #include "base/json/json_reader.h"
@@ skipping 550 matching lines @@
   content::TestNavigationObserver test_navigation_observer(web_contents, 1);
   StartSession(web_contents);
 
   MediaRouterDialogControllerImpl* controller =
       MediaRouterDialogControllerImpl::GetOrCreateForWebContents(web_contents);
   EXPECT_TRUE(controller->IsShowingMediaRouterDialog());
   controller->HideMediaRouterDialog();
   CheckStartFailed(web_contents, "AbortError", "Dialog closed.");
 }
 
+IN_PROC_BROWSER_TEST_F(MediaRouterIntegrationBrowserTest,
+                       MANUAL_Fail_StartCancelledNoSupportedSinks) {
+  SetTestData(FILE_PATH_LITERAL("no_supported_sinks.json"));
+  OpenTestPage(FILE_PATH_LITERAL("basic_test.html"));
+  content::WebContents* web_contents =
+      browser()->tab_strip_model()->GetActiveWebContents();
+  ASSERT_TRUE(web_contents);
+  content::TestNavigationObserver test_navigation_observer(web_contents, 1);
+  StartSession(web_contents);
+
+  MediaRouterDialogControllerImpl* controller =
+      MediaRouterDialogControllerImpl::GetOrCreateForWebContents(web_contents);
+  EXPECT_TRUE(controller->IsShowingMediaRouterDialog());
+  WaitUntilSinkDiscoveredOnUI();
+  controller->HideMediaRouterDialog();
+  CheckStartFailed(web_contents, "NotFoundError", "No screens found.");
+}
+
 }  // namespace media_router