cros: Remove BaseScreen::Initialize method.

chrome/browser/chromeos/login/screens/base_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_BASE_SCREEN_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_BASE_SCREEN_H_
 
 #include <string>
 
 #include "base/gtest_prod_util.h"
@@ skipping 25 matching lines @@
   // ---- Old implementation ----
 
   // Makes wizard screen visible.
   virtual void Show() = 0;
 
   // Makes wizard screen invisible.
   virtual void Hide() = 0;
 
   // ---- New Implementation ----
 
-  // Called to perform initialization of the screen. UI is guaranteed to exist
-  // at this point. Screen can alter context, resulting context will be passed
-  // to JS. This method will be called once per instance of the Screen object.
-  virtual void Initialize(::login::ScreenContext* context);
-
   // Called when screen appears.
   virtual void OnShow();
   // Called when screen disappears, either because it finished it's work, or
   // because some other screen pops up.
   virtual void OnHide();
 
   // Called when we navigate from screen so that we will never return to it.
   // This is a last chance to call JS counterpart, this object will be deleted
   // soon.
   virtual void OnClose();
@@ skipping 92 matching lines @@
   BaseScreenDelegate* base_screen_delegate_ = nullptr;
 
   const OobeScreen screen_id_;
 
   DISALLOW_COPY_AND_ASSIGN(BaseScreen);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_BASE_SCREEN_H_