Improve HRD first run experience

remoting/webapp/base/js/message_window.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.
 
 'use strict';
 
 /**
  * @constructor
  */
 function MessageWindowImpl() {
@@ skipping 27 matching lines @@
     };
     parentWindow.postMessage(message, '*');
     this.sentReply_ = true;
   } else {
     // Make sure that the reply we're ignoring is from the window close.
     base.debug.assert(result == 0);
   }
 };
 
 /**
- * Size the window to its content vertically.
- * @private
- */
-MessageWindowImpl.prototype.updateSize_ = function() {
-  var outerBounds = chrome.app.window.current().outerBounds;
-  var innerBounds = chrome.app.window.current().innerBounds;
-  var borderY = outerBounds.height - innerBounds.height;
-  window.resizeTo(outerBounds.width, document.body.clientHeight + borderY);
-  // Sometimes, resizing the window causes its position to be reset to (0, 0),
-  // so restore it explicitly.
-  window.moveTo(outerBounds.left, outerBounds.top);
-};
-
-/**
  * Initializes the button with the label and the click handler.
  * Hides the button if the label is null or undefined.
  *
  * @param{HTMLElement} button
  * @param{?string} label
  * @param{Function} clickHandler
  * @private
  */
 MessageWindowImpl.prototype.initButton_ =
     function(button, label, clickHandler) {
@@ skipping 66 matching lines @@
       var buttonToFocus = (cancelButtonLabel) ? cancelButton : button;
       buttonToFocus.focus();
 
       // Add a close handler in case the window is closed without clicking one
       // of the buttons. This will send a 0 as the result.
       // Note that when a button is pressed, this will result in sendReply_
       // being called multiple times (once for the button, once for close).
       chrome.app.window.current().onClosed.addListener(
           this.sendReply_.bind(this, event.source, messageId, 0));
 
-      this.updateSize_();
+      base.resizeWindowToContent();
       chrome.app.window.current().show();
       break;
 
     case 'update_message':
       var message = /** @type {string} */ (event.data['message']);
       if (typeof(message) != 'string') {
         console.log('Bad update_message message:', event.data);
         break;
       }
 
       var messageDiv = document.getElementById('message');
       messageDiv.innerText = message;
 
-      this.updateSize_();
+      base.resizeWindowToContent();
       break;
 
     default:
       console.error('Unexpected message:', event.data);
   }
 };
 
 var messageWindow = new MessageWindowImpl();