[Code cleanup]Remove webui keyboard mojo binding

ui/keyboard/webui/vk_webui_controller.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 UI_KEYBOARD_WEBUI_VK_WEBUI_CONTROLLER_H_
-#define UI_KEYBOARD_WEBUI_VK_WEBUI_CONTROLLER_H_
-
-#include "base/macros.h"
-#include "base/memory/singleton.h"
-#include "base/memory/weak_ptr.h"
-#include "content/public/browser/web_ui_controller.h"
-#include "content/public/browser/web_ui_controller_factory.h"
-#include "third_party/mojo/src/mojo/public/cpp/bindings/interface_request.h"
-#include "third_party/mojo/src/mojo/public/cpp/system/core.h"
-#include "ui/keyboard/keyboard_export.h"
-#include "ui/keyboard/webui/keyboard.mojom.h"
-
-namespace content {
-class WebUIDataSource;
-}
-
-namespace keyboard {
-
-class VKMojoHandler;
-
-class VKWebUIController : public content::WebUIController {
- public:
-  explicit VKWebUIController(content::WebUI* web_ui);
-  ~VKWebUIController() override;
-
- private:
-  void CreateAndStoreUIHandler(
-      mojo::InterfaceRequest<KeyboardUIHandlerMojo> request);
-
-  // content::WebUIController:
-  void RenderViewCreated(content::RenderViewHost* host) override;
-
-  scoped_ptr<VKMojoHandler> ui_handler_;
-  base::WeakPtrFactory<VKWebUIController> weak_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(VKWebUIController);
-};
-
-class KEYBOARD_EXPORT VKWebUIControllerFactory
-    : public content::WebUIControllerFactory {
- public:
-  // WebUIControllerFactory:
-  content::WebUI::TypeID GetWebUIType(content::BrowserContext* browser_context,
-                                      const GURL& url) const override;
-  bool UseWebUIForURL(content::BrowserContext* browser_context,
-                      const GURL& url) const override;
-  bool UseWebUIBindingsForURL(content::BrowserContext* browser_context,
-                              const GURL& url) const override;
-  content::WebUIController* CreateWebUIControllerForURL(
-      content::WebUI* web_ui,
-      const GURL& url) const override;
-
-  static VKWebUIControllerFactory* GetInstance();
-
- protected:
-  VKWebUIControllerFactory();
-  ~VKWebUIControllerFactory() override;
-
- private:
-  friend struct DefaultSingletonTraits<VKWebUIControllerFactory>;
-
-  DISALLOW_COPY_AND_ASSIGN(VKWebUIControllerFactory);
-};
-
-}  // namespace keyboard
-
-#endif  // UI_KEYBOARD_WEBUI_VK_WEBUI_CONTROLLER_H_