Send backspace to ChromeVox from Braille IME.

chrome/browser/resources/chromeos/braille_ime/externs.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 Externs for the braille IME.
  * @externs
  */
 
 /**
@@ skipping 24 matching lines @@
 chrome.input.ime.commitText = function(parameters, opt_callback) {};
 
 /**
  * @param {!Object.<string,(string|number)>} parameters An object with
  *     'contextID' (number) and 'text' (string) keys.
  * @param {function(boolean): void=} opt_callback Callback function.
  */
 chrome.input.ime.deleteSurroundingText = function(parameters, opt_callback) {};
 
 /**
+ * @param {string} requestId
+ * @param {boolean} response
+ */
+chrome.input.ime.keyEventHandled = function(requestId, response) {};
+
+/**
  * @param {{engineID: string, items: Array.<chrome.input.ime.MenuItem>}}
  *     parameters
  * @param {function()=} opt_callback
  */
 chrome.input.ime.setMenuItems = function(parameters, opt_callback) {};
 
 /** @type {!ChromeEvent} */
 chrome.input.ime.onActivate;
 
 /** @type {!ChromeEvent} */
@@ skipping 82 matching lines @@
 
 /** @type {boolean} */
 ChromeKeyboardEvent.prototype.ctrlKey;
 
 /** @type {boolean} */
 ChromeKeyboardEvent.prototype.shiftKey;
 
 /** @type {boolean} */
 ChromeKeyboardEvent.prototype.capsLock;
 
+/** @type {string} */
+ChromeKeyboardEvent.prototype.requestId;
+
 /**
  * @constructor
  */
 function InputContext() {}
 
 /** @type {number} */
 InputContext.prototype.contextID;
 
 /** @type {string} */
 InputContext.prototype.type;
 
 /**
  * @typedef {{
  *     id: string,
  *     label: (string|undefined),
  *     style: string,
  *     visible: (boolean|undefined),
  *     checked: (boolean|undefined),
  *     enabled: (boolean|undefined)
  * }}
  */
 chrome.input.ime.MenuItem;
 
 /**
  * @type {Object}
  */
 var localStorage;