Fixed calls to JS side from the UpdateScreen.

chrome/browser/resources/chromeos/login/oobe_screen_update.js

 // Copyright (c) 2012 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 update screen implementation.
  */
 
 login.createScreen('UpdateScreen', 'update', function() {
   return {
     EXTERNAL_API: [
-      'enableUpdateCancel'
+      'enableUpdateCancel',
+      'setUpdateProgress',
+      'showEstimatedTimeLeft',
+      'setEstimatedTimeLeft',
+      'showProgressMessage',
+      'setProgressMessage',
+      'setUpdateMessage',
+      'showUpdateCurtain'
     ],
 
     /**
      * Header text of the screen.
      * @type {string}
      */
     get header() {
       return loadTimeData.getString('updateScreenTitle');
     },
 
     /**
      * Cancels the screen.
      */
     cancel: function() {
       // It's safe to act on the accelerator even if it's disabled on official
       // builds, since Chrome will just ignore the message in that case.
       var updateCancelHint = $('update-cancel-hint').firstElementChild;
       updateCancelHint.textContent =
           loadTimeData.getString('cancelledUpdateMessage');
       chrome.send('cancelUpdate');
     },
 
     /**
      * Makes 'press Escape to cancel update' hint visible.
      */
     enableUpdateCancel: function() {
       $('update-cancel-hint').hidden = false;
+    },
+
+    /**
+     * Sets update's progress bar value.
+     * @param {number} progress Percentage of the progress bar.
+     */
+    setUpdateProgress: function(progress) {
+      $('update-progress-bar').value = progress;
+    },
+
+    /**
+     * Shows or hides downloading ETA message.
+     * @param {boolean} visible Are ETA message visible?
+     */
+    showEstimatedTimeLeft: function(visible) {
+      $('progress-message').hidden = visible;
+      $('estimated-time-left').hidden = !visible;
+    },
+
+    /**
+     * Sets estimated time left until download will complete.
+     * @param {number} seconds Time left in seconds.
+     */
+    setEstimatedTimeLeft: function(seconds) {
+      var minutes = Math.ceil(seconds / 60);
+      var message = '';
+      if (minutes > 60) {
+        message = loadTimeData.getString('downloadingTimeLeftLong');
+      } else if (minutes > 55) {
+        message = loadTimeData.getString('downloadingTimeLeftStatusOneHour');
+      } else if (minutes > 20) {
+        message = loadTimeData.getStringF('downloadingTimeLeftStatusMinutes',
+                                          Math.ceil(minutes / 5) * 5);
+      } else if (minutes > 1) {
+        message = loadTimeData.getStringF('downloadingTimeLeftStatusMinutes',
+                                          minutes);
+      } else {
+        message = loadTimeData.getString('downloadingTimeLeftSmall');
+      }
+      $('estimated-time-left').textContent =
+        loadTimeData.getStringF('downloading', message);
+    },
+
+    /**
+     * Shows or hides info message below progress bar.
+     * @param {boolean} visible Are message visible?
+     */
+    showProgressMessage: function(visible) {
+      $('estimated-time-left').hidden = visible;
+      $('progress-message').hidden = !visible;
+    },
+
+    /**
+     * Sets message below progress bar.
+     * @param {string} message Message that should be shown.
+     */
+    setProgressMessage: function(message) {
+      $('progress-message').innerText = message;
+    },
+
+    /**
+     * Sets update message, which is shown above the progress bar.
+     * @param {text} message Message which is shown by the label.
+     */
+    setUpdateMessage: function(message) {
+      $('update-upper-label').textContent = message;
+    },
+
+    /**
+     * Shows or hides update curtain.
+     * @param {boolean} visible Are curtains visible?
+     */
+    showUpdateCurtain: function(visible) {
+      $('update-screen-curtain').hidden = !visible;
+      $('update-screen-main').hidden = visible;
     }
   };
 });
-