athena: Use mojo to provide the bindings for the virtual keyboard.

athena/virtual_keyboard/vk_message_handler.h

-// Copyright 2014 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 ATHENA_VIRTUAL_KEYBOARD_VK_MESSAGE_HANDLER_H_
-#define ATHENA_VIRTUAL_KEYBOARD_VK_MESSAGE_HANDLER_H_
-
-#include "base/macros.h"
-#include "content/public/browser/web_ui_message_handler.h"
-
-namespace base {
-class ListValue;
-}
-
-namespace athena {
-
-// Processes WebUI messages for chrome://keyboard.
-class VKMessageHandler : public content::WebUIMessageHandler {
- public:
-  VKMessageHandler();
-  virtual ~VKMessageHandler();
-
- private:
-  // WebUI message callbacks.
-  void SendKeyEvent(const base::ListValue* params);
-  void HideKeyboard(const base::ListValue* params);
-
-  // content::WebUIMessageHandler:
-  virtual void RegisterMessages() OVERRIDE;
-
-  DISALLOW_COPY_AND_ASSIGN(VKMessageHandler);
-};
-
-}  // namespace athena
-
-#endif  // ATHENA_VIRTUAL_KEYBOARD_VK_MESSAGE_HANDLER_H_