cros: Fold UserImageModel into UserImageScreen

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

-// Copyright 2015 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_USER_IMAGE_MODEL_H_
-#define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_USER_IMAGE_MODEL_H_
-
-#include <string>
-
-#include "chrome/browser/chromeos/login/screens/base_screen.h"
-
-namespace chromeos {
-
-class BaseScreenDelegate;
-class UserImageView;
-
-class UserImageModel : public BaseScreen {
- public:
-  static const char kContextKeyIsCameraPresent[];
-  static const char kContextKeySelectedImageURL[];
-  static const char kContextKeyProfilePictureDataURL[];
-  static const char kContextKeyHasGaiaAccount[];
-
-  explicit UserImageModel(BaseScreenDelegate* base_screen_delegate);
-  ~UserImageModel() override;
-
-  // Called when UI ready to be shown.
-  virtual void OnScreenReady() = 0;
-
-  // Called when user accepts photo as login user image.
-  virtual void OnPhotoTaken(const std::string& raw_data) = 0;
-
-  // Called when some image was selected. |is_user_selection| indicates if
-  // it was user selection or image was selected programmatically.
-  virtual void OnImageSelected(const std::string& image_url,
-                               const std::string& image_type,
-                               bool is_user_selection) = 0;
-
-  // Called when user accepts currently selected image
-  virtual void OnImageAccepted() = 0;
-
-  // Called when actor is destroyed so there's no dead reference to it.
-  virtual void OnViewDestroyed(UserImageView* view) = 0;
-};
-
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_USER_IMAGE_MODEL_H_