cros: Remove unused method

chrome/browser/chromeos/login/screens/eula_screen.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_EULA_SCREEN_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_EULA_SCREEN_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 18 matching lines @@
     virtual void SetUsageStatisticsReporting(bool val) = 0;
     virtual bool GetUsageStatisticsReporting() const = 0;
   };
 
   EulaScreen(BaseScreenDelegate* base_screen_delegate,
              Delegate* delegate,
              EulaView* view);
   ~EulaScreen() override;
 
   // EulaModel implementation:
-  void PrepareToShow() override;
   void Show() override;
   void Hide() override;
   GURL GetOemEulaUrl() const override;
   void InitiatePasswordFetch() override;
   bool IsUsageStatsEnabled() const override;
   void OnViewDestroyed(EulaView* view) override;
   void OnUserAction(const std::string& action_id) override;
   void OnContextKeyUpdated(const ::login::ScreenContext::KeyType& key) override;
 
   // TpmPasswordFetcherDelegate implementation:
@@ skipping 15 matching lines @@
   EulaView* view_;
 
   TpmPasswordFetcher password_fetcher_;
 
   DISALLOW_COPY_AND_ASSIGN(EulaScreen);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_EULA_SCREEN_H_