[Media Router] Add integration browser tests

chrome/test/media_router/media_router_e2e_ui_browsertest.cc

Index: chrome/test/media_router/media_router_e2e_ui_browsertest.cc
diff --git a/chrome/test/media_router/media_router_e2e_ui_browsertest.cc b/chrome/test/media_router/media_router_e2e_ui_browsertest.cc
index 135f2eeffd00057c080881dde766a83dff29252f..49289f3d125c590466aa6ebf903d5ccd1628f1c4 100644
--- a/chrome/test/media_router/media_router_e2e_ui_browsertest.cc
+++ b/chrome/test/media_router/media_router_e2e_ui_browsertest.cc
@@ -22,7 +22,7 @@ IN_PROC_BROWSER_TEST_F(MediaRouterE2EBrowserTest, MANUAL_MirrorHTML5Video) {
   ASSERT_TRUE(dialog_contents);
   // Wait for 1s to make sure the dialog finishes rendering.
   Wait(base::TimeDelta::FromSeconds(1));
-  WaitUntilSinkDiscoveredOnUI();
+  WaitUntilSinkDiscoveredOnUI(web_contents);
   ChooseSink(web_contents, receiver());
   WaitUntilRouteCreated();