Added 'contextReady' message for HostPairingScreen.

chrome/browser/resources/chromeos/login/oobe_screen_host_pairing.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 host pairing screen implementation.
  */
 
 login.createScreen('HostPairingScreen', 'host-pairing', function() {
   'use strict';
 
   // Keep these constants synced with corresponding constants in
   // host_pairing_screen_actor.{h,cc}.
   /** @const */ var CONTEXT_KEY_PAGE = 'page';
   /** @const */ var CONTEXT_KEY_DEVICE_NAME = 'deviceName';
   /** @const */ var CONTEXT_KEY_CONFIRMATION_CODE = 'code';
   /** @const */ var CONTEXT_KEY_ENROLLMENT_DOMAIN = 'enrollmentDomain';
   /** @const */ var CONTEXT_KEY_UPDATE_PROGRESS = 'updateProgress';
 
   /** @const */ var PAGE_WELCOME = 'welcome';
   /** @const */ var PAGE_CODE_CONFIRMATION = 'code-confirmation';
   /** @const */ var PAGE_UPDATE = 'update';
   /** @const */ var PAGE_ENROLLMENT_INTRODUCTION = 'enrollment-introduction';
   /** @const */ var PAGE_ENROLLMENT = 'enrollment';
   /** @const */ var PAGE_ENROLLMENT_ERROR = 'enrollment-error';
   /** @const */ var PAGE_PAIRING_DONE = 'pairing-done';
 
+  /** @const */ var CALLBACK_CONTEXT_READY = 'contextReady';
+
+
   /** @const */ var PAGE_NAMES = [
       PAGE_WELCOME,
       PAGE_CODE_CONFIRMATION,
       PAGE_UPDATE,
       PAGE_ENROLLMENT_INTRODUCTION,
       PAGE_ENROLLMENT,
       PAGE_ENROLLMENT_ERROR,
       PAGE_PAIRING_DONE];
 
   return {
     pages_: null,
 
     /** @override */
     decorate: function() {
       this.initialize();
 
       this.pages_ = {};
       PAGE_NAMES.forEach(function(pageName) {
         var page = this.querySelector('.page-' + pageName);
         if (page === null)
           throw Error('Page "' + pageName + '" was not found.');
         page.hidden = true;
         this.pages_[pageName] = page;
       }, this);
 
       this.addContextObserver(CONTEXT_KEY_PAGE, this.pageChanged_);
+      this.send(CALLBACK_CONTEXT_READY);
     },
 
     pageChanged_: function(newPage, oldPage) {
       this.pageNameLabel_.textContent = '<<<< ' + newPage + ' >>>>';
       this.deviceNameLabel_.textContent =
           this.context.get(CONTEXT_KEY_DEVICE_NAME);
 
       if (newPage == PAGE_CODE_CONFIRMATION)
         this.confirmationCodeLabel_.textContent =
             this.context.get(CONTEXT_KEY_CONFIRMATION_CODE);
@@ skipping 18 matching lines @@
         this.pages_[pageName].hidden = (pageName !== newPage);
       }, this);
     },
 
     setUpdateProgress_: function(progress) {
       this.updateProgressBar_.value = progress;
     }
   };
 });