[Mac] Retain a reference within a scoped_nsobject of a Page Action's context menu.

chrome/browser/cocoa/location_bar/page_action_decoration.h

Index: chrome/browser/cocoa/location_bar/page_action_decoration.h
diff --git a/chrome/browser/cocoa/location_bar/page_action_decoration.h b/chrome/browser/cocoa/location_bar/page_action_decoration.h
index d8d5ab7bd31d225313625840935219111d341633..26089124e250154104c170195012a560d0e288cc 100644
--- a/chrome/browser/cocoa/location_bar/page_action_decoration.h
+++ b/chrome/browser/cocoa/location_bar/page_action_decoration.h
@@ -12,6 +12,7 @@
 #include "googleurl/src/gurl.h"
 
 class ExtensionAction;
+@class ExtensionActionContextMenu;
 class LocationBarViewMac;
 class Profile;
 class TabContents;
@@ -101,6 +102,9 @@ class PageActionDecoration : public ImageDecoration,
   // The string to show for a tooltip.
   scoped_nsobject<NSString> tooltip_;
 
+  // The context menu for the Page Action.
+  scoped_nsobject<ExtensionActionContextMenu> menu_;
+
   // This is used for post-install visual feedback. The page_action
   // icon is briefly shown even if it hasn't been enabled by its
   // extension.