ash/immersive mode: Hide the launcher when entering immersive mode

chrome/browser/ui/ash/launcher/launcher_context_menu.cc

Index: chrome/browser/ui/ash/launcher/launcher_context_menu.cc
diff --git a/chrome/browser/ui/ash/launcher/launcher_context_menu.cc b/chrome/browser/ui/ash/launcher/launcher_context_menu.cc
index 54c780ee5ed30055e8a6d42c67a1a705fc95a5e0..425ec2d65b0a7e03d5a86c3c9364b424ed7f4015 100644
--- a/chrome/browser/ui/ash/launcher/launcher_context_menu.cc
+++ b/chrome/browser/ui/ash/launcher/launcher_context_menu.cc
@@ -7,7 +7,9 @@
 #include <string>
 
 #include "ash/desktop_background/user_wallpaper_delegate.h"
+#include "ash/root_window_controller.h"
 #include "ash/shell.h"
+#include "ash/wm/property_util.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "chrome/browser/extensions/context_menu_matcher.h"
@@ -128,8 +130,13 @@ void LauncherContextMenu::Init() {
       }
     }
   }
-  AddCheckItemWithStringId(
-      MENU_AUTO_HIDE, IDS_AURA_LAUNCHER_CONTEXT_MENU_AUTO_HIDE);
+  // Don't show the auto-hide menu item while in immersive mode because the
+  // launcher always auto-hides in this mode and it's confusing when the
+  // preference appears not to apply.
+  if (!ash::GetRootWindowController(root_window_)->IsImmersiveMode()) {
+    AddCheckItemWithStringId(
+        MENU_AUTO_HIDE, IDS_AURA_LAUNCHER_CONTEXT_MENU_AUTO_HIDE);
+  }
   if (CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kShowLauncherAlignmentMenu)) {
     AddSubMenuWithStringId(MENU_ALIGNMENT_MENU,