Revert of chromeos: Remove some IME methods from ash::SystemTrayDelegate

chrome/browser/ui/ash/ime_controller_chromeos.h

Index: chrome/browser/ui/ash/ime_controller_chromeos.h
diff --git a/chrome/browser/ui/ash/ime_controller_chromeos.h b/chrome/browser/ui/ash/ime_controller_chromeos.h
new file mode 100644
index 0000000000000000000000000000000000000000..339e1f2844076e9b8b938ce9d586848f45c11e0c
--- /dev/null
+++ b/chrome/browser/ui/ash/ime_controller_chromeos.h
@@ -0,0 +1,30 @@
+// 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 CHROME_BROWSER_UI_ASH_IME_CONTROLLER_CHROMEOS_H_
+#define CHROME_BROWSER_UI_ASH_IME_CONTROLLER_CHROMEOS_H_
+
+#include "ash/ime_control_delegate.h"
+#include "base/compiler_specific.h"
+#include "base/macros.h"
+
+// A class which controls ime when an IME shortcut key such as Control+space is
+// pressed.
+class ImeController : public ash::ImeControlDelegate {
+ public:
+  ImeController() {}
+  ~ImeController() override {}
+
+  // Overridden from ash::ImeControlDelegate:
+  bool CanCycleIme() override;
+  void HandleNextIme() override;
+  void HandlePreviousIme() override;
+  bool CanSwitchIme(const ui::Accelerator& accelerator) override;
+  void HandleSwitchIme(const ui::Accelerator& accelerator) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ImeController);
+};
+
+#endif  // CHROME_BROWSER_UI_ASH_IME_CONTROLLER_CHROMEOS_H_