[Media Router] Add Media Router Mojo impl code.

chrome/browser/media/router/media_router_type_converters.cc

Index: chrome/browser/media/router/media_router_type_converters.cc
diff --git a/chrome/browser/media/router/media_router_type_converters.cc b/chrome/browser/media/router/media_router_type_converters.cc
index a3818ad66a36dfe245cb139772de39a19f6993d5..28eec013ab9c3cba0948e8e1af86919bc0a081fc 100644
--- a/chrome/browser/media/router/media_router_type_converters.cc
+++ b/chrome/browser/media/router/media_router_type_converters.cc
@@ -37,6 +37,16 @@ TypeConverter<media_router::MediaRoute, MediaRoutePtr>::Convert(
 }
 
 // static
+scoped_ptr<media_router::MediaRoute>
+TypeConverter<scoped_ptr<media_router::MediaRoute>, MediaRoutePtr>::Convert(
+    const MediaRoutePtr& input) {
+  return make_scoped_ptr(new media_router::MediaRoute(
+      input->media_route_id, media_router::MediaSource(input->media_source),
+      input->media_sink.To<media_router::MediaSink>(), input->description,
+      input->is_local));
+}
+
+// static
 MediaRoutePtr TypeConverter<MediaRoutePtr, media_router::MediaRoute>::Convert(
     const media_router::MediaRoute& input) {
   MediaRoutePtr output(media_router::interfaces::MediaRoute::New());