Fix shelf layout when switching from left-aligned shelf to right-aligned shelf

ash/system/status_area_widget_delegate.cc

Index: ash/system/status_area_widget_delegate.cc
diff --git a/ash/system/status_area_widget_delegate.cc b/ash/system/status_area_widget_delegate.cc
index 08c580e4254b32802b701bbd0d9d408edcfaf97d..e12a2187a0e9303acd2904fb64bb30027410a50f 100644
--- a/ash/system/status_area_widget_delegate.cc
+++ b/ash/system/status_area_widget_delegate.cc
@@ -226,6 +226,8 @@ void StatusAreaWidgetDelegate::SetBorderOnChild(views::View* child,
   }
   child->SetBorder(views::Border::CreateEmptyBorder(top_edge, left_edge,
                                                     bottom_edge, right_edge));
+  // Force layout to update after change border around |child|.

[James Cook, 2016/06/29 22:20:35]

nit: I would explain in a little more detail *why* you have to do this. I would
also cite the bug number in the comment.

+  child->InvalidateLayout();
 }
 
 }  // namespace ash