Show media router toolbar icon ephemerally for active local routes and issues

chrome/browser/media/router/media_router_ui_service_factory_unittest.cc

 // Copyright 2016 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 <memory>
 
 #include "chrome/browser/media/router/media_router_ui_service.h"
 #include "chrome/browser/media/router/media_router_ui_service_factory.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/toolbar/toolbar_actions_model.h"
@@ skipping 26 matching lines @@
 
  protected:
   content::TestBrowserThreadBundle thread_bundle_;
   Profile* profile() { return profile_.get(); }
 
  private:
   std::unique_ptr<Profile> profile_;
 };
 
 TEST_F(MediaRouterUIServiceFactoryUnitTest, CreateService) {
-  MediaRouterUIService* service =
-      MediaRouterUIServiceFactory::GetForBrowserContext(profile());
+  // We call BuildServiceInstanceFor() directly because
+  // MediaRouterUIServiceFactory::GetForBrowserContext() is set to return a
+  // nullptr for a test profile.
+  std::unique_ptr<MediaRouterUIService> service(
+      static_cast<MediaRouterUIService*>(
+          MediaRouterUIServiceFactory::GetInstance()->BuildServiceInstanceFor(
+              profile())));
   ASSERT_TRUE(service);
 }
 
 }  // namespace media_router