Remove mojo::String.

chrome/browser/media/router/mojo/media_router_mojo_impl_unittest.cc

Index: chrome/browser/media/router/mojo/media_router_mojo_impl_unittest.cc
diff --git a/chrome/browser/media/router/mojo/media_router_mojo_impl_unittest.cc b/chrome/browser/media/router/mojo/media_router_mojo_impl_unittest.cc
index 4837c6a115a9ad5dfcde38f3b3262beb8d6229b3..3098f90db4b1334e45771acdef96e2ef4b1b766c 100644
--- a/chrome/browser/media/router/mojo/media_router_mojo_impl_unittest.cc
+++ b/chrome/browser/media/router/mojo/media_router_mojo_impl_unittest.cc
@@ -642,10 +642,10 @@ TEST_F(MediaRouterMojoImplTest, TerminateRouteFails) {
   base::RunLoop run_loop;
   EXPECT_CALL(mock_media_route_provider_, TerminateRoute(kRouteId, _))
       .WillOnce(Invoke([&run_loop](
-          const mojo::String& route_id,
+          const std::string& route_id,
           const mojom::MediaRouteProvider::TerminateRouteCallback& cb) {
-         cb.Run(std::string("timed out"),
-                mojom::RouteRequestResultCode::TIMED_OUT);
+        cb.Run(std::string("timed out"),
+               mojom::RouteRequestResultCode::TIMED_OUT);
       }));
   router()->TerminateRoute(kRouteId);
   run_loop.RunUntilIdle();