[Merge to M58] cros: Fix shelf overlaps bottom of maximized window in guest session

ash/common/shelf/shelf_controller.cc

Index: ash/common/shelf/shelf_controller.cc
diff --git a/ash/common/shelf/shelf_controller.cc b/ash/common/shelf/shelf_controller.cc
index 5e5fc6e1dce2e23404cab8a1158b620b66ae2b2e..f9a7a984cc1578aee661b353e10386a242793a8b 100644
--- a/ash/common/shelf/shelf_controller.cc
+++ b/ash/common/shelf/shelf_controller.cc
@@ -163,9 +163,6 @@ void ShelfController::AddObserver(
 
 void ShelfController::SetAlignment(ShelfAlignment alignment,
                                    int64_t display_id) {
-  if (!ash::WmShelf::CanChangeShelfAlignment())
-    return;
-
   WmShelf* shelf = GetShelfForDisplay(display_id);
   // TODO(jamescook): The initialization check should not be necessary, but
   // otherwise this wrongly tries to set the alignment on a secondary display