Add policy for ash launcher auto-hide behavior

ash/shell/context_menu.cc

Index: ash/shell/context_menu.cc
diff --git a/ash/shell/context_menu.cc b/ash/shell/context_menu.cc
index fe23f20b411414a429aac31026a165bf12fca33c..700563cb83b194fc43637afe2c9126fbf86d3f46 100644
--- a/ash/shell/context_menu.cc
+++ b/ash/shell/context_menu.cc
@@ -33,7 +33,8 @@ ContextMenu::~ContextMenu() {
 bool ContextMenu::IsCommandIdChecked(int command_id) const {
   switch (command_id) {
     case MENU_AUTO_HIDE:
-      return Shell::GetInstance()->IsShelfAutoHideMenuHideChecked(root_window_);
+      return Shell::GetInstance()->GetShelfAutoHideBehavior(root_window_) ==
+          ash::SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS;
     default:
       return false;
   }
@@ -50,10 +51,14 @@ bool ContextMenu::GetAcceleratorForCommandId(
 }
 
 void ContextMenu::ExecuteCommand(int command_id) {
+  Shell* shell = Shell::GetInstance();
   switch (static_cast<MenuItem>(command_id)) {
     case MENU_AUTO_HIDE:
-      Shell::GetInstance()->SetShelfAutoHideBehavior(
-          Shell::GetInstance()->GetToggledShelfAutoHideBehavior(root_window_),
+      shell->SetShelfAutoHideBehavior(
+          shell->GetShelfAutoHideBehavior(root_window_) ==
+              SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS ?
+                  SHELF_AUTO_HIDE_BEHAVIOR_NEVER :
+                  SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS,
           root_window_);
       break;
     case MENU_ALIGNMENT_MENU: