[Media Router] Add UMA metrics for media route controller creation

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

Index: chrome/browser/media/router/mojo/media_router_mojo_metrics.cc
diff --git a/chrome/browser/media/router/mojo/media_router_mojo_metrics.cc b/chrome/browser/media/router/mojo/media_router_mojo_metrics.cc
index 806a502100491b15103e22d9e82e8307203862a9..289ed74fa33e5b136e37834fd8648940843ef25b 100644
--- a/chrome/browser/media/router/mojo/media_router_mojo_metrics.cc
+++ b/chrome/browser/media/router/mojo/media_router_mojo_metrics.cc
@@ -77,6 +77,13 @@ void MediaRouterMojoMetrics::RecordMediaRouteProviderTerminateRoute(
 }
 
 // static
+void MediaRouterMojoMetrics::RecordMediaRouteControllerCreationResult(
+    bool success) {
+  UMA_HISTOGRAM_BOOLEAN("MediaRouter.Provider.RouteControllerCreationOutcome",
+                        success);
+}
+
+// static
 MediaRouteProviderVersion MediaRouterMojoMetrics::GetMediaRouteProviderVersion(
     const base::Version& extension_version,
     const base::Version& browser_version) {