Remove virtual keyboard support.

chrome/browser/ui/webui/keyboard_ui.h

-// Copyright (c) 2011 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_WEBUI_KEYBOARD_UI_H_
-#define CHROME_BROWSER_UI_WEBUI_KEYBOARD_UI_H_
-#pragma once
-
-#include <string>
-
-#include "chrome/browser/ui/webui/chrome_url_data_manager.h"
-#include "content/public/browser/web_ui_controller.h"
-
-// The WebContents used for the keyboard page.
-class KeyboardUI : public content::WebUIController {
- public:
-  explicit KeyboardUI(content::WebUI* web_ui);
-  virtual ~KeyboardUI();
-
-  class KeyboardHTMLSource : public ChromeURLDataManager::DataSource {
-   public:
-    KeyboardHTMLSource();
-
-    // Overrides from DataSource
-    virtual void StartDataRequest(const std::string& path,
-                                  bool is_incognito,
-                                  int request_id) OVERRIDE;
-    virtual std::string GetMimeType(const std::string&) const OVERRIDE;
-
-   private:
-    virtual ~KeyboardHTMLSource() {}
-
-    DISALLOW_COPY_AND_ASSIGN(KeyboardHTMLSource);
-  };
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(KeyboardUI);
-};
-
-#endif  // CHROME_BROWSER_UI_WEBUI_KEYBOARD_UI_H_