Added [Close] button on completed activation overlay div....

chrome/browser/resources/mobile_setup.js

 // Copyright (c) 2010 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.
 
 
 cr.define('mobile', function() {
 
   function MobileSetup() {
   }
 
@@ skipping 28 matching lines @@
       if (this.initialized_) {
         console.log('calling initialize() again?');
         return;
       }
       this.initialized_ = true;
       self = this;
       this.frameName_ = frame_name;
       window.addEventListener('message', function(e) {
           self.onMessageReceived_(e);
       });
+      $('closeButton').addEventListener('click', function(e) {
+          $('finalMessage').classList.add('hidden');
+      });
       $(frame_name).addEventListener('load', function(e) {
         // Flip the visibility of the payment page only after the frame is
         // fully loaded.
         if (self.state_ == MobileSetup.PLAN_ACTIVATION_SHOWING_PAYMENT) {
           $('statusHeader').textContent = '';
           $('finalMessage').classList.add('hidden');
           $('errorMessage').classList.add('hidden');
           $('systemStatus').classList.add('hidden');
           $('canvas').classList.add('hidden');
           $('paymentForm').classList.remove('hidden');
@@ skipping 155 matching lines @@
     mobile.MobileSetup.getInstance().initialize('paymentForm');
   };
 
   // Export
   return {
     MobileSetup: MobileSetup
   };
 
 });