[Media Router] Add a supports_web_ui_controller attribute to MediaRoute

chrome/common/media_router/mojo/media_router_struct_traits.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/common/media_router/mojo/media_router_struct_traits.h"
 
 #include "chrome/common/media_router/media_source.h"
 #include "net/interfaces/ip_address_struct_traits.h"
 #include "url/mojo/url_gurl_struct_traits.h"
 
@@ skipping 185 matching lines @@
   out->set_description(description);
 
   base::Optional<std::string> custom_controller_path;
   if (!data.ReadCustomControllerPath(&custom_controller_path))
     return false;
 
   if (custom_controller_path)
     out->set_custom_controller_path(*custom_controller_path);
 
   out->set_local(data.is_local());
+  out->set_supports_media_route_controller(
+      data.supports_media_route_controller());
   out->set_for_display(data.for_display());
   out->set_incognito(data.is_incognito());
   out->set_offscreen_presentation(data.is_offscreen_presentation());
 
   return true;
 }
 
 }  // namespace mojo