Implement support for chorded braille commands

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.require('AutomationPredicate');
 goog.require('AutomationUtil');
 goog.require('BackgroundKeyboardHandler');
+goog.require('BrailleCommandHandler');
 goog.require('ChromeVoxState');
 goog.require('CommandHandler');
 goog.require('FindHandler');
 goog.require('LiveRegions');
 goog.require('NextEarcons');
 goog.require('Notifications');
 goog.require('Output');
 goog.require('Output.EventType');
 goog.require('PanelCommand');
 goog.require('Stubs');
@@ skipping 516 matching lines @@
         break;
       case cvox.BrailleKeyCommand.BOTTOM:
         CommandHandler.onCommand('jumpToBottom');
         break;
       case cvox.BrailleKeyCommand.ROUTING:
         this.brailleRoutingCommand_(
             content.text,
             // Cast ok since displayPosition is always defined in this case.
             /** @type {number} */ (evt.displayPosition));
         break;
+      case cvox.BrailleKeyCommand.CHORD:
+        if (!evt.brailleDots)
+          return false;
+
+        BrailleCommandHandler.onBrailleCommand(evt.brailleDots);
+        break;
       default:
         return false;
     }
     return true;
   },
 
   /**
    * Returns true if the url should have Classic running.
    * @return {boolean}
    * @private
@@ skipping 252 matching lines @@
   return new RegExp('^(' + globs.map(function(glob) {
     return glob.replace(/[.+^$(){}|[\]\\]/g, '\\$&')
         .replace(/\*/g, '.*')
         .replace(/\?/g, '.');
   }).join('|') + ')$');
 };
 
 new Background();
 
 });  // goog.scope