Add Hide to app menu.

chrome/browser/ui/cocoa/apps/app_shim_menu_controller_mac.h

Index: chrome/browser/ui/cocoa/apps/app_shim_menu_controller_mac.h
diff --git a/chrome/browser/ui/cocoa/apps/app_shim_menu_controller_mac.h b/chrome/browser/ui/cocoa/apps/app_shim_menu_controller_mac.h
index 6346b793e006fade0d57d7ee1a63133a33394ea4..b1cf4891dbf9e7b6d3684d5830a81718154dadce 100644
--- a/chrome/browser/ui/cocoa/apps/app_shim_menu_controller_mac.h
+++ b/chrome/browser/ui/cocoa/apps/app_shim_menu_controller_mac.h
@@ -9,6 +9,19 @@
 
 #include "base/mac/scoped_nsobject.h"
 
+// Used by AppShimMenuController to manage menu items that are a copy of a
+// Chrome menu item but with a different action. This manages unsetting and
+// restoring the original item's key equivalent, so that we can use the same
+// key equivalent in the copied item with a different action.
+@interface DoppelgangerMenuItem : NSObject {

[tapted, 2013/09/03 08:17:25]

I think you can forward declare this, using 
@class DoppelgangerMenuItem

[jackhou1, 2013/09/04 01:31:31]

Done.

+ @private
+  base::scoped_nsobject<NSMenuItem> menuItem_;
+  base::scoped_nsobject<NSMenuItem> sourceItem_;
+  int resourceId_;
+}
+
+@end
+
 // This controller listens to NSWindowDidBecomeMainNotification and
 // NSWindowDidResignMainNotification and modifies the main menu bar to mimic a
 // main menu for the app. When an app window becomes main, all Chrome menu items
@@ -19,8 +32,9 @@
  @private
   // The extension id of the currently focused packaged app.
   base::scoped_nsobject<NSString> appId_;
-  // A reference to the "Quit Chrome" menu item.
-  base::scoped_nsobject<NSMenuItem> chromeMenuQuitItem_;
+  // Items that need a doppelganger.
+  base::scoped_nsobject<DoppelgangerMenuItem> hideDoppelganger_;
+  base::scoped_nsobject<DoppelgangerMenuItem> quitDoppelganger_;
   // Menu items for the currently focused packaged app.
   base::scoped_nsobject<NSMenuItem> appMenuItem_;
   base::scoped_nsobject<NSMenuItem> fileMenuItem_;