cros: Cleanup lock screen and OOBE C++ backing code.

chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h

 // Copyright (c) 2013 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_UI_WEBUI_CHROMEOS_LOGIN_SIGNIN_SCREEN_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_SIGNIN_SCREEN_HANDLER_H_
 
 #include <map>
 #include <memory>
 #include <set>
@@ skipping 407 matching lines @@
   bool ShouldLoadGaia() const;
 
   // Shows signin.
   void OnShowAddUser();
 
   net::Error FrameError() const;
 
   // input_method::ImeKeyboard::Observer implementation:
   void OnCapsLockChanged(bool enabled) override;
 
-  // Returns OobeUI object of NULL.
-  OobeUI* GetOobeUI() const;
-
   // Callback invoked after the feedback is finished.
   void OnFeedbackFinished();
 
   // Current UI state of the signin screen.
   UIState ui_state_ = UI_STATE_UNKNOWN;
 
   // A delegate that glues this handler with backend LoginDisplay.
   SigninScreenHandlerDelegate* delegate_ = nullptr;
 
   // A delegate used to get gfx::NativeWindow.
@@ skipping 70 matching lines @@
   std::unique_ptr<LoginFeedback> login_feedback_;
 
   base::WeakPtrFactory<SigninScreenHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SigninScreenHandler);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_SIGNIN_SCREEN_HANDLER_H_