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

ash/common/system/web_notification/web_notification_tray.h

Index: ash/common/system/web_notification/web_notification_tray.h
diff --git a/ash/common/system/web_notification/web_notification_tray.h b/ash/common/system/web_notification/web_notification_tray.h
index b4bd2f48b551a372946d4359f0d955a74a2648d6..be6306b351a8622cc39a180c39032cf4eb06ba88 100644
--- a/ash/common/system/web_notification/web_notification_tray.h
+++ b/ash/common/system/web_notification/web_notification_tray.h
@@ -83,7 +83,8 @@ class ASH_EXPORT WebNotificationTray
   void UpdateAfterLoginStatusChange(LoginStatus login_status);
 
   // Overridden from TrayBackgroundView.
-  void SetShelfAlignment(ShelfAlignment alignment) override;
+  void SetShelfAlignment(ShelfAlignment alignment,
+                         const gfx::Insets& insets) override;
   void AnchorUpdated() override;
   base::string16 GetAccessibleNameForTray() override;
   void HideBubbleWithView(const views::TrayBubbleView* bubble_view) override;