[MR] Add description field to MediaSink.

chrome/browser/resources/media_router/media_router_data.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.
 
 // Any strings used here will already be localized. Values such as
 // CastMode.type or IDs will be defined elsewhere and determined later.
 cr.define('media_router', function() {
   'use strict';
 
   /**
@@ skipping 132 matching lines @@
     this.isLocal = isLocal;
 
     /** @type {?string} */
     this.customControllerPath = customControllerPath;
   };
 
 
   /**
    * @param {string} id The ID of the media sink.
    * @param {string} name The name of the sink.
+   * @param {?string} description Optional description of the sink.
    * @param {media_router.SinkIconType} iconType the type of icon for the sink.
    * @param {media_router.SinkStatus} status The readiness state of the sink.
    * @param {!Array<number>} castModes Cast modes compatible with the sink.
    * @constructor
    * @struct
    */
-  var Sink = function(id, name, iconType, status, castModes) {
+  var Sink = function(id, name, description, iconType, status, castModes) {
     /** @type {string} */
     this.id = id;
 
     /** @type {string} */
     this.name = name;
 
+    /** @type {?string} */
+    this.description = description;
+
     /** @type {SinkIconType} */
     this.iconType = iconType;
 
     /** @type {media_router.SinkStatus} */
     this.status = status;
 
     /** @type {!Array<number>} */
     this.castModes = castModes;
   };
 
@@ skipping 17 matching lines @@
     MediaRouterView: MediaRouterView,
     SinkIconType: SinkIconType,
     SinkStatus: SinkStatus,
     CastMode: CastMode,
     Issue: Issue,
     Route: Route,
     Sink: Sink,
     TabInfo: TabInfo,
   };
 });