| <!DOCTYPE html> |
| <!-- |
| Copyright (c) 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. |
| --> |
| |
| <link rel="import" href="/base/base.html"> |
| |
| <script> |
| 'use strict'; |
| |
| tr.exportTo('tr.ui.tracks', function() { |
| |
| /** |
| * EventToTrackMap provides a mapping mechanism between events and the |
| * tracks those events belong on. |
| * @constructor |
| */ |
| function EventToTrackMap() {} |
| |
| EventToTrackMap.prototype = { |
| addEvent: function(event, track) { |
| if (!track) |
| throw new Error('Must provide a track.'); |
| this[event.guid] = track; |
| } |
| }; |
| |
| return { |
| EventToTrackMap: EventToTrackMap |
| }; |
| }); |
| </script> |
