Mac: Give packaged app windows their own window cycle list.

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 f7428c494ffbc4beab654868b3cfa699ed7cffaf..4a07794dd977626384b6191e6a1ec6cdbb6f6e49 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
@@ -6,6 +6,7 @@
 #define CHROME_BROWSER_UI_COCOA_APPS_APP_SHIM_MENU_CONTROLLER_MAC_H_
 
 #import <Cocoa/Cocoa.h>
+#include <string>
 
 #include "base/mac/scoped_nsobject.h"
 
@@ -20,7 +21,7 @@
 @interface AppShimMenuController : NSObject {
  @private
   // The extension id of the currently focused packaged app.
-  base::scoped_nsobject<NSString> appId_;
+  std::string appId_;
   // Items that need a doppelganger.
   base::scoped_nsobject<DoppelgangerMenuItem> aboutDoppelganger_;
   base::scoped_nsobject<DoppelgangerMenuItem> hideDoppelganger_;