Use new earcons in ChromeVox Next.

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

 // Copyright 2014 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 The entry point for all ChromeVox2 related code for the
  * background page.
  */
 
 goog.provide('Background');
 goog.provide('global');
 
 goog.require('AutomationPredicate');
 goog.require('AutomationUtil');
 goog.require('ClassicCompatibility');
+goog.require('NextEarcons');
 goog.require('Output');
 goog.require('Output.EventType');
 goog.require('cursors.Cursor');
 goog.require('cvox.BrailleKeyCommand');
 goog.require('cvox.ChromeVoxEditableTextBase');
+goog.require('cvox.ClassicEarcons');
 goog.require('cvox.ExtensionBridge');
 goog.require('cvox.NavBraille');
 
 goog.scope(function() {
 var AutomationNode = chrome.automation.AutomationNode;
 var Dir = AutomationUtil.Dir;
 var EventType = chrome.automation.EventType;
 var RoleType = chrome.automation.RoleType;
 
 /**
@@ skipping 77 matching lines @@
           var url = msg['url'];
           var isClassicEnabled = this.shouldEnableClassicForUrl_(url);
           port.postMessage({
             target: 'next',
             isClassicEnabled: isClassicEnabled
           });
         }
         break;
     }
   }.bind(this));
+
+  /** @type {!cvox.AbstractEarcons} @private */
+  this.classicEarcons_ = cvox.ChromeVox.earcons || new cvox.ClassicEarcons();
+
+  /** @type {!cvox.AbstractEarcons} @private */
+  this.nextEarcons_ = new NextEarcons();
+
+  // Turn cvox.ChromeVox.earcons into a getter that returns either the
+  // Next earcons or the Classic earcons depending on the current mode.
+  Object.defineProperty(cvox.ChromeVox, 'earcons', {
+    get: (function() {
+      if (this.mode_ === ChromeVoxMode.FORCE_NEXT ||
+          this.mode_ === ChromeVoxMode.NEXT) {
+        return this.nextEarcons_;
+      } else {
+        return this.classicEarcons_;
+      }
+    }).bind(this)
+  });
 };
 
 Background.prototype = {
   /** Forces ChromeVox Next to be active for all tabs. */
   forceChromeVoxNextActive: function() {
     this.setChromeVoxMode(ChromeVoxMode.FORCE_NEXT);
   },
 
   /**
    * Handles all setup once a new automation tree appears.
@@ skipping 678 matching lines @@
               node.state.protected,
               cvox.ChromeVox.tts);
     }
   }
 };
 
 /** @type {Background} */
 global.backgroundObj = new Background();
 
 });  // goog.scope