[Media Router] Auto-close Media Router dialog after starting or stopping a session.

chrome/browser/resources/media_router/media_router.js

Index: chrome/browser/resources/media_router/media_router.js
diff --git a/chrome/browser/resources/media_router/media_router.js b/chrome/browser/resources/media_router/media_router.js
index 4773a16d3101867158506cc563fcfb569eca4667..1123de1cb8cfb2eb1f3bdf2be77d70aec51828f7 100644
--- a/chrome/browser/resources/media_router/media_router.js
+++ b/chrome/browser/resources/media_router/media_router.js
@@ -22,7 +22,8 @@ cr.define('media_router', function() {
     container = $('media-router-container');
     media_router.ui.setContainer(container);
 
-    container.addEventListener('close-button-click', onCloseDialogClick);
+    container.addEventListener('close-button-click', onCloseDialogEvent);
+    container.addEventListener('close-dialog', onCloseDialogEvent);
     container.addEventListener('close-route-click', onCloseRouteClick);
     container.addEventListener('create-route', onCreateRoute);
     container.addEventListener('issue-action-click', onIssueActionClick);
@@ -32,7 +33,7 @@ cr.define('media_router', function() {
    * Closes the dialog.
    * Called when the user clicks the close button on the dialog.
    */
-  function onCloseDialogClick() {
+  function onCloseDialogEvent() {
     media_router.browserApi.closeDialog();
   }