[Media Router] Adds return value to mojo MediaRouteProvider::TerminateRoute.

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

Index: chrome/browser/media/router/mojo/media_router_mojo_impl.cc
diff --git a/chrome/browser/media/router/mojo/media_router_mojo_impl.cc b/chrome/browser/media/router/mojo/media_router_mojo_impl.cc
index 49718c8bbc7e6e1195545ad88cd622d5586f1501..80885d0ae35971794abe8ac9a633c471073d309a 100644
--- a/chrome/browser/media/router/mojo/media_router_mojo_impl.cc
+++ b/chrome/browser/media/router/mojo/media_router_mojo_impl.cc
@@ -688,7 +688,10 @@ void MediaRouterMojoImpl::DoConnectRouteByRouteId(
 
 void MediaRouterMojoImpl::DoTerminateRoute(const MediaRoute::Id& route_id) {
   DVLOG_WITH_INSTANCE(1) << "DoTerminateRoute " << route_id;
-  media_route_provider_->TerminateRoute(route_id);
+  media_route_provider_->TerminateRoute(
+      route_id,
+      base::Bind(&MediaRouterMojoImpl::OnTerminateRouteResult,
+                 base::Unretained(this), route_id));
 }
 
 void MediaRouterMojoImpl::DoDetachRoute(const MediaRoute::Id& route_id) {
@@ -808,6 +811,18 @@ void MediaRouterMojoImpl::OnPresentationConnectionClosed(
       message);
 }
 
+void MediaRouterMojoImpl::OnTerminateRouteResult(
+    const MediaRoute::Id& route_id,
+    mojo::String error_text,
+    interfaces::RouteRequestResultCode result_code) {
+  if (result_code != interfaces::RouteRequestResultCode::OK) {
+    LOG(WARNING) << "Failed to terminate route " << route_id <<
+        ": result_code = " << result_code << ", " << error_text;
+  }
+  MediaRouterMojoMetrics::RecordMediaRouteProviderTerminateRoute(
+      mojo::RouteRequestResultCodeFromMojo(result_code));
+}
+
 void MediaRouterMojoImpl::DoStartObservingMediaSinks(
     const MediaSource::Id& source_id) {
   DVLOG_WITH_INSTANCE(1) << "DoStartObservingMediaSinks: " << source_id;