[Media Router] Add a supports_web_ui_controller attribute to MediaRoute

chrome/browser/resources/media_router/elements/media_router_container/media_router_container_interface.js

Index: chrome/browser/resources/media_router/elements/media_router_container/media_router_container_interface.js
diff --git a/chrome/browser/resources/media_router/elements/media_router_container/media_router_container_interface.js b/chrome/browser/resources/media_router/elements/media_router_container/media_router_container_interface.js
index 9cbfadd2bb790ed4167a42a31818f09fb8048fc4..052d81d48119338da764a794099d3d4764d4ef5a 100644
--- a/chrome/browser/resources/media_router/elements/media_router_container/media_router_container_interface.js
+++ b/chrome/browser/resources/media_router/elements/media_router_container/media_router_container_interface.js
@@ -39,6 +39,12 @@ MediaRouterContainerInterface.prototype.firstRunFlowCloudPrefLearnMoreUrl;
  */
 MediaRouterContainerInterface.prototype.firstRunFlowLearnMoreUrl;
 
+/**
+ * The header element.
+ * @type {!MediaRouterHeaderElement}
+ */
+MediaRouterContainerInterface.prototype.header;
+
 /**
  * The header text for the sink list.
  * @type {string|undefined}
@@ -96,6 +102,14 @@ MediaRouterContainerInterface.prototype.showFirstRunFlowCloudPref;
  */
 MediaRouterContainerInterface.prototype.useWebUiRouteControls;
 
+/**
+ * Adds an event listener callback for an event.
+ * @param {string} eventName
+ * @param {function(!Event)} callback
+ */
+MediaRouterContainerInterface.prototype.addEventListener = function(
+    eventName, callback) {};
+
 /**
  * Fires a 'report-initial-action' event when the user takes their first
  * action after the dialog opens. Also fires a 'report-initial-action-close'