[Media Router] Show user email in header if cloud sink is present.

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 12033b63a8ad7a604cc827753ad80eb50c4ea966..ec99f7dab414de405938dd3b045f5f5a1665d787 100644
--- a/chrome/browser/resources/media_router/media_router.js
+++ b/chrome/browser/resources/media_router/media_router.js
@@ -28,7 +28,10 @@ cr.define('media_router', function() {
 
     container = /** @type {!MediaRouterContainerElement} */
         ($('media-router-container'));
-    media_router.ui.setContainer(container);
+
+    media_router.ui.setElements(container,
+        /** @type {!MediaRouterHeaderElement} */
+        (container.$['container-header']));
 
     container.addEventListener('acknowledge-first-run-flow',
                                onAcknowledgeFirstRunFlow);