[cros] Fix repetitive image selection bug in OOBE.

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

 // Copyright (c) 2011 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 user image screen implementation.
  */
 
 cr.define('oobe', function() {
 
@@ skipping 213 matching lines @@
       Oobe.getInstance().headerHidden = true;
       $('user-image-grid').updateAndFocus();
       chrome.send('onUserImageScreenShown');
     },
 
     /**
      * Accepts currently selected image, if possible.
      * @private
      */
     acceptImage_: function() {
-      if (!$('ok-button').disabled)
+      var okButton = $('ok-button');
+      if (!okButton.disabled) {
+        // This ensures that #ok-button won't be re-enabled again.
+        $('user-image-grid').disabled = true;
+        okButton.disabled = true;
         chrome.send('onUserImageAccepted');
+      }
     },
 
     /**
      * Notifies about camera presence change.
      * @param {boolean} present Whether a camera is present or not.
      * @private
      */
     setCameraPresent_: function(present) {
       var imageGrid = $('user-image-grid');
       if (present && !this.takePhotoButton_) {
@@ skipping 81 matching lines @@
   ].forEach(function(name) {
     UserImageScreen[name] = function(value) {
       $('user-image')[name + '_'](value);
     };
   });
 
   return {
     UserImageScreen: UserImageScreen
   };
 });