Remove OS_CHROMEOS from ui/ash code

chrome/browser/ui/ash/session_state_delegate_views.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_ASH_SESSION_STATE_DELEGATE_VIEWS_H_
-#define CHROME_BROWSER_UI_ASH_SESSION_STATE_DELEGATE_VIEWS_H_
-
-#include "ash/session/session_state_delegate.h"
-#include "base/compiler_specific.h"
-#include "base/macros.h"
-#include "base/observer_list.h"
-#include "ui/gfx/image/image_skia.h"
-
-namespace ash {
-class SessionStateObserver;
-}  // namespace ash
-
-class SessionStateDelegate : public ash::SessionStateDelegate {
- public:
-  SessionStateDelegate();
-  ~SessionStateDelegate() override;
-
-  // ash::SessionStateDelegate:
-  int GetMaximumNumberOfLoggedInUsers() const override;
-  int NumberOfLoggedInUsers() const override;
-  bool IsActiveUserSessionStarted() const override;
-  bool CanLockScreen() const override;
-  bool IsScreenLocked() const override;
-  bool ShouldLockScreenBeforeSuspending() const override;
-  void LockScreen() override;
-  void UnlockScreen() override;
-  bool IsUserSessionBlocked() const override;
-  SessionState GetSessionState() const override;
-  const user_manager::UserInfo* GetUserInfo(
-      ash::UserIndex index) const override;
-  bool ShouldShowAvatar(aura::Window* window) const override;
-  gfx::ImageSkia GetAvatarImageForWindow(aura::Window* window) const override;
-  void SwitchActiveUser(const AccountId& account_id) override;
-  void CycleActiveUser(CycleUser cycle_user) override;
-  bool IsMultiProfileAllowedByPrimaryUserPolicy() const override;
-  void AddSessionStateObserver(ash::SessionStateObserver* observer) override;
-  void RemoveSessionStateObserver(ash::SessionStateObserver* observer) override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(SessionStateDelegate);
-};
-
-#endif  // CHROME_BROWSER_UI_ASH_SESSION_STATE_DELEGATE_VIEWS_H_