Example of usage of new features of context and screen.

chrome/browser/chromeos/login/screens/screen_observer.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_SCREEN_OBSERVER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_SCREEN_OBSERVER_H_
 
 #include <string>
 
 namespace chromeos {
@@ skipping 27 matching lines @@
     ENTERPRISE_ENROLLMENT_COMPLETED,
     ENTERPRISE_AUTO_MAGIC_ENROLLMENT_COMPLETED,
     ENTERPRISE_ENROLLMENT_BACK,
     RESET_CANCELED,
     KIOSK_AUTOLAUNCH_CANCELED,
     KIOSK_AUTOLAUNCH_CONFIRMED,
     KIOSK_ENABLE_COMPLETED,
     TERMS_OF_SERVICE_DECLINED,
     TERMS_OF_SERVICE_ACCEPTED,
     WRONG_HWID_WARNING_SKIPPED,
+    CONTROLLER_PAIRING_FINISHED,
     EXIT_CODES_COUNT  // not a real code, must be the last
   };
 
   // Method called by a screen when user's done with it.
   virtual void OnExit(ExitCodes exit_code) = 0;
 
   // Forces current screen showing.
   virtual void ShowCurrentScreen() = 0;
 
   // Notify about new user names and password. It is used to autologin
   // just created user without asking the same info once again.
   virtual void OnSetUserNamePassword(const std::string& username,
                                      const std::string& password) = 0;
 
   // Whether usage statistics reporting is enabled on EULA screen.
   virtual void SetUsageStatisticsReporting(bool val) = 0;
   virtual bool GetUsageStatisticsReporting() const = 0;
 
   virtual ErrorScreen* GetErrorScreen() = 0;
   virtual void ShowErrorScreen() = 0;
   virtual void HideErrorScreen(WizardScreen* parent_screen) = 0;
 
  protected:
   virtual ~ScreenObserver() {}
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_SCREEN_OBSERVER_H_