ash: Use enum for SessionController::CycleActiveUser

ash/common/test/test_session_state_delegate.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 ASH_COMMON_TEST_TEST_SESSION_STATE_DELEGATE_H_
 #define ASH_COMMON_TEST_TEST_SESSION_STATE_DELEGATE_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 30 matching lines @@
   bool ShouldLockScreenAutomatically() const override;
   void LockScreen() override;
   void UnlockScreen() override;
   bool IsUserSessionBlocked() const override;
   session_manager::SessionState GetSessionState() const override;
   const user_manager::UserInfo* GetUserInfo(
       ash::UserIndex index) const override;
   bool ShouldShowAvatar(WmWindow* window) const override;
   gfx::ImageSkia GetAvatarImageForWindow(WmWindow* window) const override;
   void SwitchActiveUser(const AccountId& account_id) override;
-  void CycleActiveUser(CycleUser cycle_user) override;
+  void CycleActiveUser(CycleUserDirection direction) override;
   bool IsMultiProfileAllowedByPrimaryUserPolicy() const override;
   void AddSessionStateObserver(ash::SessionStateObserver* observer) override;
   void RemoveSessionStateObserver(ash::SessionStateObserver* observer) override;
 
   // TODO(oshima): Use state machine instead of using boolean variables.
 
   // Updates the internal state that indicates whether a session is in progress
   // and there is an active user. If |has_active_user| is |false|,
   // |active_user_session_started_| is reset to |false| as well (see below for
   // the difference between these two flags).
@@ skipping 51 matching lines @@
   // before the profile and browser UI are available.
   session_manager::SessionState session_state_;
 
   DISALLOW_COPY_AND_ASSIGN(TestSessionStateDelegate);
 };
 
 }  // namespace test
 }  // namespace ash
 
 #endif  // ASH_COMMON_TEST_TEST_SESSION_STATE_DELEGATE_H_