chromeos: Remove some IME methods from ash::SystemTrayDelegate

ash/ime_control_delegate.h

-// Copyright (c) 2012 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_IME_CONTROL_DELEGATE_H_
-#define ASH_IME_CONTROL_DELEGATE_H_
-
-namespace ui {
-class Accelerator;
-}  // namespace ui
-
-namespace ash {
-
-// Delegate for controlling IME (input method editor).
-class ImeControlDelegate {
- public:
-  virtual ~ImeControlDelegate() {}
-
-  // Returns whether a user can cycle through IMEs. Returns false if only one
-  // IME is enabled.
-  virtual bool CanCycleIme() = 0;
-
-  // Changes the IME to what is listed next.
-  virtual void HandleNextIme() = 0;
-
-  // Changes the IME to previously selected one. If there is no previously
-  // selected IMEs, chooses the next listed IME.
-  virtual void HandlePreviousIme() = 0;
-
-  // Returns true if the IME can be switched to the IME associated with
-  // |accelerator|.
-  virtual bool CanSwitchIme(const ui::Accelerator& accelerator) = 0;
-
-  // Switches to the IME associated with |accelerator|.
-  virtual void HandleSwitchIme(const ui::Accelerator& accelerator) = 0;
-};
-
-}  // namespace ash
-
-#endif  // ASH_IME_CONTROL_DELEGATE_H_