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

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

 // Copyright 2015 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.
 
 // This Polymer element contains the entire media router interface. It handles
 // hiding and showing specific components.
 Polymer({
   is: 'media-router-container',
 
   properties: {
@@ skipping 280 matching lines @@
      */
     shareYourScreenSubheadingText_: {
       type: String,
       readOnly: true,
       value: function() {
         return loadTimeData.getString('shareYourScreenSubheading');
       },
     },
 
     /**
+     * Whether to show the user domain of sinks associated with identity.
+     * @type {boolean}
+     */
+    showDomain: {
+      type: Boolean,
+      value: false,
+    },
+
+    /**
      * Whether to show the first run flow.
      * @type {boolean}
      */
     showFirstRunFlow: {
       type: Boolean,
       value: false,
       observer: 'updateElementPositioning_',
     },
 
     /**
@@ skipping 64 matching lines @@
      * Whether the user has already taken an action.
      * @type {boolean}
      */
     userHasTakenInitialAction_: {
       type: Boolean,
       value: false,
     },
   },
 
   listeners: {
+    'header-height-changed': 'updateElementPositioning_',
     'header-or-arrow-click': 'toggleCastModeHidden_',
     'mouseleave': 'onMouseLeave_',
     'mouseenter': 'onMouseEnter_',
   },
 
   observers: [
     'maybeUpdateStartSinkDisplayStartTime_(currentView_, sinksToShow_)',
   ],
 
   ready: function() {
@@ skipping 329 matching lines @@
         (!!issue && issue.isBlocking);
   },
 
   /**
    * Returns whether the sink domain for |sink| should be hidden.
    * @param {!media_router.Sink} sink
    * @return {boolean} |true| if the domain should be hidden.
    * @private
    */
   computeSinkDomainHidden_: function(sink) {
-    // TODO(amp): Check the domain of Chrome profile identity and only show the
-    // sink domain if it doesn't match the profile domain. crbug.com/570797
-    return this.isEmptyOrWhitespace_(sink.domain);
+    return !this.showDomain || this.isEmptyOrWhitespace_(sink.domain);
   },
 
   /**
    * Returns the subtext to be shown for |sink|. Only called if
    * |computeSinkSubtextHidden_| returns false for the same |sink| and
    * |sinkToRouteMap|.
    * @param {!media_router.Sink} sink
    * @param {!Object<!string, ?media_router.Route>} sinkToRouteMap
    * @return {?string} The subtext to be shown.
    * @private
@@ skipping 472 matching lines @@
   /**
    * Update the max dialog height and update the positioning of the elements.
    *
    * @param {number} height The max height of the Media Router dialog.
    */
   updateMaxDialogHeight: function(height) {
     this.dialogHeight_ = height;
     this.updateElementPositioning_();
   },
 });