Improving layout and a11y for HID detection OOBE screen.

chrome/browser/resources/chromeos/login/oobe_screen_hid_detection.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 Oobe HID detection screen implementation.
  */
 
 login.createScreen('HIDDetectionScreen', 'hid-detection', function() {
   return {
@@ skipping 114 matching lines @@
         $('hid-keyboard-label-paired').textContent = data['keyboard-label'];
       else if (state == 'pairing') {
         $('hid-keyboard-label-pairing').textContent = data['keyboard-label'];
         if (data['pairing-state'] == this.PAIRING.REMOTE_PIN_CODE ||
             data['pairing-state'] == this.PAIRING.REMOTE_PASSKEY) {
           this.setPincodeKeysState_(-1);
           for (var i = 0, len = data['pincode'].length; i < len; i++) {
             var pincodeSymbol = $('hid-keyboard-pincode-sym-' + (i + 1));
             pincodeSymbol.textContent = data['pincode'][i];
           }
+          announceAccessibleMessage(
+              data['keyboard-label'] + ' ' + data['pincode'] + ' ' +
+              loadTimeData.getString('hidDetectionBTEnterKey'));
         }
       } else if (state == 'update') {
         if ('keysEntered' in data) {
           this.setPincodeKeysState_(data['keysEntered']);
         }
       }
     },
 
     /**
      * Event handler that is invoked just before the screen in shown.
@@ skipping 15 matching lines @@
     /**
      * Displays the pairing overlay.
      * @param {Object} device Description of the Bluetooth device.
      */
     showPairingLayout: function(device) {
       BluetoothPairing.getInstance().update(device);
       OptionsPage.showPageByName('bluetoothPairing', false);
     },
   };
 });