Disable VK overscroll for login/out-of-box.

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

 // Copyright 2013 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 Common OOBE controller methods.
  */
 
 <include src="../../login/screen.js"></include>
 <include src="../user_images_grid.js"></include>
@@ skipping 302 matching lines @@
     chrome.send('oauthEnrollClose', ['done']);
   };
 
   /**
    * Shows/hides login UI control bar with buttons like [Shut down].
    */
   Oobe.showControlBar = function(show) {
     Oobe.getInstance().headerHidden = !show;
   };
 
+  /**
+   * Sets the current state of the virtual keyboard (shown/hidden).
+   */
+  Oobe.setKeyboardState = function(shown) {
+    Oobe.getInstance().virtualKeyboardShown = shown;
+  };
+
   // Export
   return {
     Oobe: Oobe
   };
 });
 
 var Oobe = cr.ui.Oobe;
 
 // Allow selection events on components with editable text (password field)
 // bug (http://code.google.com/p/chromium/issues/detail?id=125863)
@@ skipping 21 matching lines @@
   cr.ui.login.ResourceLoader.loadAssets(SCREEN_OOBE_ENROLLMENT, function() {
     // This screen is async-loaded so we manually trigger i18n processing.
     i18nTemplate.process($('oauth-enrollment'), loadTimeData);
     // Delayed binding since this isn't defined yet.
     login.OAuthEnrollmentScreen.register();
   });
 
   // Delayed binding since this isn't defined yet.
   cr.ui.Oobe.initialize();
 });