ScreenObserver::(Set|Get)UsageStatisticsReporting() are extracted into EulaScreen::Delegate.

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 46 matching lines @@
   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;
-
   // Set remora configuration from shark.
   virtual void SetHostConfiguration() = 0;
   virtual void ConfigureHost(bool accepted_eula,
                              const std::string& lang,
                              const std::string& timezone,
                              bool send_reports,
                              const std::string& keyboard_layout) = 0;
 
   virtual ErrorScreen* GetErrorScreen() = 0;
   virtual void ShowErrorScreen() = 0;
   virtual void HideErrorScreen(BaseScreen* parent_screen) = 0;
 
  protected:
   virtual ~ScreenObserver() {}
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_SCREEN_OBSERVER_H_