Remove ArcSessionManager::SetShelfDelegateForTesting.

chrome/browser/chromeos/arc/arc_session_manager.h

Index: chrome/browser/chromeos/arc/arc_session_manager.h
diff --git a/chrome/browser/chromeos/arc/arc_session_manager.h b/chrome/browser/chromeos/arc/arc_session_manager.h
index 6f85e91f348a6470bddf571c4158ed019a45be4e..d5192354ba0826e00b869fefa7bd31eb77a04cc7 100644
--- a/chrome/browser/chromeos/arc/arc_session_manager.h
+++ b/chrome/browser/chromeos/arc/arc_session_manager.h
@@ -22,10 +22,6 @@
 class ArcAppLauncher;
 class Profile;
 
-namespace ash {
-class ShelfDelegate;
-}
-
 namespace user_prefs {
 class PrefRegistrySyncable;
 }
@@ -118,7 +114,6 @@ class ArcSessionManager : public ArcSessionObserver,
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
 
   static void DisableUIForTesting();
-  static void SetShelfDelegateForTesting(ash::ShelfDelegate* shelf_delegate);
   static void EnableCheckAndroidManagementForTesting();
 
   // Returns true if ARC is allowed to run for the current session.