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

ash/system/status_area_widget.h

Index: ash/system/status_area_widget.h
diff --git a/ash/system/status_area_widget.h b/ash/system/status_area_widget.h
index ce4eeb0fe8ad9edfff85fd35eb3d95ec420306a4..e6d5208af27553857b6fd91a851b8523ad148ded 100644
--- a/ash/system/status_area_widget.h
+++ b/ash/system/status_area_widget.h
@@ -82,6 +82,11 @@ class ASH_EXPORT StatusAreaWidget : public views::Widget {
 #endif
   void AddOverviewButtonTray();
 
+  // Calculate the border insets for tray items (ex: notification, overview) for
+  // both MD and non-MD.
+  gfx::Insets CalculateBorderMD(ShelfAlignment alignment, bool is_on_edge);
+  gfx::Insets CalculateBorderNonMD(ShelfAlignment alignment, bool is_overview);
+
   // Weak pointers to View classes that are parented to StatusAreaWidget:
   StatusAreaWidgetDelegate* status_area_widget_delegate_;
   OverviewButtonTray* overview_button_tray_;