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

ash/system/status_area_widget.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ASH_SYSTEM_STATUS_AREA_WIDGET_H_
 #define ASH_SYSTEM_STATUS_AREA_WIDGET_H_
 
 #include "ash/ash_export.h"
 #include "ash/common/login_status.h"
 #include "ash/common/shelf/shelf_types.h"
@@ skipping 64 matching lines @@
 
  private:
   void AddSystemTray();
   void AddWebNotificationTray();
 #if defined(OS_CHROMEOS)
   void AddLogoutButtonTray();
   void AddVirtualKeyboardTray();
 #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_;
   SystemTray* system_tray_;
   WebNotificationTray* web_notification_tray_;
 #if defined(OS_CHROMEOS)
   LogoutButtonTray* logout_button_tray_;
   VirtualKeyboardTray* virtual_keyboard_tray_;
 #endif
   LoginStatus login_status_;
 
   WmShelf* wm_shelf_;
 
   DISALLOW_COPY_AND_ASSIGN(StatusAreaWidget);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_STATUS_AREA_WIDGET_H_