Enable commands API for platform apps.

chrome/browser/ui/gtk/extensions/shell_window_gtk.h

 // Copyright (c) 2012 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_GTK_EXTENSIONS_SHELL_WINDOW_GTK_H_
 #define CHROME_BROWSER_UI_GTK_EXTENSIONS_SHELL_WINDOW_GTK_H_
 
 #include <gtk/gtk.h>
 
 #include "base/timer.h"
 #include "chrome/browser/ui/extensions/native_shell_window.h"
 #include "chrome/browser/ui/extensions/shell_window.h"
 #include "chrome/browser/ui/gtk/extensions/extension_view_gtk.h"
 #include "third_party/skia/include/core/SkRegion.h"
 #include "ui/base/gtk/gtk_signal.h"
 #include "ui/base/x/active_window_watcher_x_observer.h"
 #include "ui/gfx/rect.h"
 
+class ExtensionKeybindingRegistryGtk;
 class Profile;
 
 namespace extensions {
 class Extension;
 struct DraggableRegion;
 }
 
 class ShellWindowGtk : public NativeShellWindow,
                        public ExtensionViewGtk::Container,
                        public ui::ActiveWindowWatcherXObserver {
@@ skipping 82 matching lines @@
   // If true, don't call gdk_window_raise() when we get a click in the title
   // bar or window border.  This is to work around a compiz bug.
   bool suppress_window_raise_;
 
   // True if the window shows without frame.
   bool frameless_;
 
   // The timer used to save the window position for session restore.
   base::OneShotTimer<ShellWindowGtk> window_configure_debounce_timer_;
 
+  // The Extension Keybinding Registry responsible for registering listeners for
+  // accelerators that are sent to the window, that are destined to be turned
+  // into events and sent to the extension.
+  scoped_ptr<ExtensionKeybindingRegistryGtk> extension_keybinding_registry_;
+
   DISALLOW_COPY_AND_ASSIGN(ShellWindowGtk);
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_EXTENSIONS_SHELL_WINDOW_GTK_H_