Enable to show the keyboard overlay by shortcut key.

chrome/browser/ui/views/keyboard_overlay_delegate.h

+// Copyright (c) 2010 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_VIEWS_KEYBOARD_OVERLAY_DELEGATE_H_
+#define CHROME_BROWSER_UI_VIEWS_KEYBOARD_OVERLAY_DELEGATE_H_
+
+#include "gfx/native_widget_types.h"
+#include "chrome/browser/dom_ui/html_dialog_ui.h"
+
+class KeyboardOverlayDelegate : public HtmlDialogUIDelegate {
+ public:
+  KeyboardOverlayDelegate(const std::wstring& title);
+
+  // Shows the keyboard overlay dialog box.
+  static void ShowDialog(gfx::NativeWindow owning_window);
+
+ private:
+  ~KeyboardOverlayDelegate();
+
+  // Overridden from HtmlDialogUI::Delegate:
+  virtual bool IsDialogModal() const;
+  virtual std::wstring GetDialogTitle() const;
+  virtual GURL GetDialogContentURL() const;
+  virtual void GetDOMMessageHandlers(
+      std::vector<DOMMessageHandler*>* handlers) const;
+  virtual void GetDialogSize(gfx::Size* size) const;
+  virtual std::string GetDialogArgs() const;
+  virtual void OnDialogClosed(const std::string& json_retval);
+  virtual void OnCloseContents(TabContents* source, bool* out_close_dialog);
+  virtual bool ShouldShowDialogTitle() const;
+
+  // The dialog title.
+  std::wstring title_;
+
+  DISALLOW_COPY_AND_ASSIGN(KeyboardOverlayDelegate);
+};
+
+#endif  // CHROME_BROWSER_UI_VIEWS_KEYBOARD_OVERLAY_DELEGATE_H_