[Code cleanup]Remove webui virtual keyboard code

ui/keyboard/keyboard_ui_controller.h

Index: ui/keyboard/keyboard_ui_controller.h
diff --git a/ui/keyboard/keyboard_ui_controller.h b/ui/keyboard/keyboard_ui_controller.h
deleted file mode 100644
index b06ec26c8e27c4caa078e27e1e0c29afd247a40e..0000000000000000000000000000000000000000
--- a/ui/keyboard/keyboard_ui_controller.h
+++ /dev/null
@@ -1,29 +0,0 @@
-// 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 UI_KEYBOARD_KEYBOARD_UI_CONTROLLER_H_
-#define UI_KEYBOARD_KEYBOARD_UI_CONTROLLER_H_
-
-#include "content/public/browser/web_ui_controller.h"
-#include "ui/keyboard/keyboard_export.h"
-
-namespace content {
-class WebUI;
-};
-
-namespace keyboard {
-
-// WebUIController for chrome://keyboard/.
-class KEYBOARD_EXPORT KeyboardUIController : public content::WebUIController {
- public:
-  explicit KeyboardUIController(content::WebUI* web_ui);
-  virtual ~KeyboardUIController();
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(KeyboardUIController);
-};
-
-}  // namespace keyboard
-
-#endif  // UI_KEYBOARD_KEYBOARD_UI_CONTROLLER_H_