ash: Fix shelf auto hide behavior not persisted regression.

ash/launcher/launcher_context_menu.h

Index: ash/launcher/launcher_context_menu.h
diff --git a/ash/launcher/launcher_context_menu.h b/ash/launcher/launcher_context_menu.h
index a7f638f9f45913e54073ecc8db63abed89304d0d..0bf706d733f4a798cdb4c182f583767282274a29 100644
--- a/ash/launcher/launcher_context_menu.h
+++ b/ash/launcher/launcher_context_menu.h
@@ -7,6 +7,7 @@
 #pragma once
 
 #include "ash/ash_export.h"
+#include "ash/wm/shelf_auto_hide_behavior.h"
 #include "base/basictypes.h"
 #include "ui/base/models/simple_menu_model.h"
 
@@ -22,8 +23,8 @@ class ASH_EXPORT LauncherContextMenu : public ui::SimpleMenuModel,
   // Returns true if the auto-hide menu item is checked.
   static bool IsAutoHideMenuHideChecked();
 
-  // Toggles the state of the auto-hide menu item.
-  static void ToggleAutoHideMenu();
+  // Returns the toggled state of the auto-hide behavior.
+  static ShelfAutoHideBehavior GetToggledAutoHideBehavior();
 
   // Returns the resource id for the auto-hide menu.
   static int GetAutoHideResourceStringId();