Enable to show the keyboard overlay by shortcut key.

chrome/browser/ui/views/frame/browser_view.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_FRAME_BROWSER_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_VIEW_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 309 matching lines @@
   virtual void ShowCreateChromeAppShortcutsDialog(Profile*,
                                                   const Extension* app);
   virtual void Cut();
   virtual void Copy();
   virtual void Paste();
   virtual void ToggleTabStripMode();
   virtual void PrepareForInstant();
   virtual void ShowInstant(TabContents* preview_contents);
   virtual void HideInstant();
   virtual gfx::Rect GetInstantBounds();
+#if defined(OS_CHROMEOS)
+  virtual void ShowKeyboardOverlay(gfx::NativeWindow owning_window);
+#endif
 
   // Overridden from BrowserWindowTesting:
   virtual BookmarkBarView* GetBookmarkBarView() const;
   virtual LocationBarView* GetLocationBarView() const;
   virtual views::View* GetTabContentsContainerView() const;
   virtual views::View* GetSidebarContainerView() const;
   virtual ToolbarView* GetToolbarView() const;
 
   // Overridden from NotificationObserver:
   virtual void Observe(NotificationType type,
@@ skipping 314 matching lines @@
   UnhandledKeyboardEventHandler unhandled_keyboard_event_handler_;
 
   scoped_ptr<AccessibleViewHelper> accessible_view_helper_;
 
   NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_VIEW_H_