Expose media controls to accessibility

chrome/browser/resources/chromeos/chromevox/cvox2/background/media_automation_handler.js

+// Copyright 2016 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.
+
+/**
+ * @fileoverview Handles media events automation.
+ */
+
+goog.provide('MediaAutomationHandler');
+
+goog.require('BaseAutomationHandler');
+
+goog.scope(function() {
+var AutomationEvent = chrome.automation.AutomationEvent;
+var AutomationNode = chrome.automation.AutomationNode;
+var EventType = chrome.automation.EventType;
+var RoleType = chrome.automation.RoleType;
+
+/**
+ * @param {!AutomationNode} node The root to observe media changes.
+ * @constructor
+ * @extends {BaseAutomationHandler}
+ */
+MediaAutomationHandler = function(node) {
+  BaseAutomationHandler.call(this, node);
+
+  var e = EventType;
+  this.addListener_(e.mediaStartedPlaying, this.onMediaStartedPlaying);
+  this.addListener_(e.mediaStoppedPlaying, this.onMediaStoppedPlaying);
+};
+
+MediaAutomationHandler.prototype = {
+  __proto__: BaseAutomationHandler.prototype,
+
+  /**
+   * @param {!AutomationEvent} evt
+   */
+  onMediaStartedPlaying: function(evt) {
+  },
+
+  /**
+   * @param {!AutomationEvent} evt
+   */
+  onMediaStoppedPlaying: function(evt) {
+  }
+};
+
+});  // goog.scope