Refactor oobe/login screens so lock screen can be loaded faster.

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

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Copyright (c) 2016 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 Login UI based on a stripped down OOBE controller.
  */
 
-<include src="login_common.js">
-<include src="notification_card.js">
+<include src="login_shared.js">
 
 cr.define('cr.ui.Oobe', function() {
   return {
     /**
      * Initializes the OOBE flow.  This will cause all C++ handlers to
      * be invoked to do final setup.
      */
     initialize: function() {
       // TODO(jdufault): Remove this after resolving crbug.com/452599.
-      console.log('Initializing OOBE');
+      console.log('Start initializing LOCK OOBE');
 
       cr.ui.login.DisplayManager.initialize();
-      login.WrongHWIDScreen.register();
       login.AccountPickerScreen.register();
-      login.GaiaSigninScreen.register();
-      login.UserImageScreen.register(/* lazyInit= */ true);
-      login.ResetScreen.register();
-      login.AutolaunchScreen.register();
-      login.KioskEnableScreen.register();
-      login.ErrorMessageScreen.register();
-      login.TPMErrorMessageScreen.register();
-      login.PasswordChangedScreen.register();
-      login.SupervisedUserCreationScreen.register();
-      login.TermsOfServiceScreen.register();
-      login.AppLaunchSplashScreen.register();
-      login.ConfirmPasswordScreen.register();
-      login.FatalErrorScreen.register();
-      login.DeviceDisabledScreen.register();
-      login.UnrecoverableCryptohomeErrorScreen.register();
 
       cr.ui.Bubble.decorate($('bubble'));
       login.HeaderBar.decorate($('login-header-bar'));
 
       chrome.send('screenStateInitialize');
     },
 
     // Dummy Oobe functions not present with stripped login UI.
     initializeA11yMenu: function(e) {},
     handleAccessibilityLinkClick: function(e) {},
     handleSpokenFeedbackClick: function(e) {},
     handleHighContrastClick: function(e) {},
     handleScreenMagnifierClick: function(e) {},
     setUsageStats: function(checked) {},
     setOemEulaUrl: function(oemEulaUrl) {},
     setTpmPassword: function(password) {},
     refreshA11yInfo: function(data) {},
 
     /**
      * Reloads content of the page.
      * @param {!Object} data New dictionary with i18n values.
      */
     reloadContent: function(data) {
       loadTimeData.overrideValues(data);
       i18nTemplate.process(document, loadTimeData);
       Oobe.getInstance().updateLocalizedContent_();
     },
   };
 });