Swap main menu with app-specific menu when app window focused.

chrome/browser/app_controller_mac.h

Index: chrome/browser/app_controller_mac.h
diff --git a/chrome/browser/app_controller_mac.h b/chrome/browser/app_controller_mac.h
index 46d8a051f3328c97b1c4c7ab344bd5879ebd9835..bc10cd2b94f0605ee1e39fcd3090f902863bdace 100644
--- a/chrome/browser/app_controller_mac.h
+++ b/chrome/browser/app_controller_mac.h
@@ -17,6 +17,7 @@
 #include "ui/base/work_area_watcher_observer.h"
 
 class AppControllerProfileObserver;
+@class AppShimMenuController;
 class BookmarkMenuBridge;
 class CommandUpdater;
 class GURL;
@@ -49,6 +50,9 @@ class WorkAreaWatcherObserver;
   scoped_ptr<BookmarkMenuBridge> bookmarkMenuBridge_;
   scoped_ptr<HistoryMenuBridge> historyMenuBridge_;
 
+  // Controller that manages main menu items for packaged apps.
+  base::scoped_nsobject<AppShimMenuController> appShimMenuController_;
+
   // The profile menu, which appears right before the Help menu. It is only
   // available when multiple profiles is enabled.
   base::scoped_nsobject<ProfileMenuController> profileMenuController_;