cros: Fold NetworkModel into NetworkScreen

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

-// Copyright 2014 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_NETWORK_MODEL_H_
-#define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_NETWORK_MODEL_H_
-
-#include "chrome/browser/chromeos/login/screens/base_screen.h"
-
-namespace base {
-class ListValue;
-}
-
-namespace chromeos {
-
-class BaseScreenDelegate;
-class NetworkView;
-
-class NetworkModel : public BaseScreen {
- public:
-  static const char kUserActionContinueButtonClicked[];
-  static const char kUserActionConnectDebuggingFeaturesClicked[];
-  static const char kContextKeyLocale[];
-  static const char kContextKeyInputMethod[];
-  static const char kContextKeyTimezone[];
-  static const char kContextKeyContinueButtonEnabled[];
-
-  explicit NetworkModel(BaseScreenDelegate* base_screen_delegate);
-  ~NetworkModel() override;
-
-  // This method is called, when view is being destroyed. Note, if model
-  // is destroyed earlier then it has to call Unbind().
-  virtual void OnViewDestroyed(NetworkView* view) = 0;
-
-  virtual std::string GetLanguageListLocale() const = 0;
-
-  virtual const base::ListValue* GetLanguageList() const = 0;
-
-  virtual void UpdateLanguageList() = 0;
-};
-
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_NETWORK_MODEL_H_