[Media Router] Use common media-router-header for MR UI.

chrome/browser/resources/media_router/elements/route_details/route_details.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 shows information from media that is currently cast
-// to a device. It is assumed that |route| and |sink| correspond to each other.
+// to a device.
 Polymer({
   is: 'route-details',
 
   properties: {
     /**
      * The text for the current casting activity status.
      * @private {string}
      */
     activityStatus_: {
       type: String,
       value: '',
     },
 
     /**
-     * The current view to be shown.
-     * @private {media_router.MediaRouterView}
-     */
-    currentView_: {
-      type: String,
-      readOnly: true,
-      value: media_router.MediaRouterView.ROUTE_DETAILS,
-    },
-
-    /**
      * The route to show.
      * @type {?media_router.Route}
      */
     route: {
       type: Object,
       value: null,
       observer: 'maybeLoadCustomController_',
     },
 
     /**
-     * The sink to show.
-     * @type {?media_router.Sink}
-     */
-    sink: {
-      type: Object,
-      value: null,
-    },
-
-    /**
      * The text for the stop casting button.
      * @private {string}
      */
     stopCastingButtonText_: {
       type: String,
       readOnly: true,
       value: loadTimeData.getString('stopCastingButton'),
     },
 
     /**
@@ skipping 48 matching lines @@
     extensionview.load(this.route.customControllerPath)
     .then(function() {
       // Load was successful; show the custom controller.
       that.isCustomControllerHidden_ = false;
     }, function() {
       // Load was unsuccessful; fall back to default view.
       that.isCustomControllerHidden_ = true;
     });
   },
 });