Refactors DockedWindowLayoutManager in terms of ash/wm/common

ash/system/chromeos/screen_security/screen_tray_item.h

 // Copyright 2013 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_CHROMEOS_SCREEN_TRAY_ITEM_H_
 #define ASH_SYSTEM_CHROMEOS_SCREEN_TRAY_ITEM_H_
 
 #include "ash/system/tray/system_tray.h"
 #include "ash/system/tray/system_tray_item.h"
 #include "ash/system/tray/system_tray_notifier.h"
@@ skipping 105 matching lines @@
   virtual void CreateOrUpdateNotification() = 0;
 
   // Returns the id of the notification for the tray item.
   virtual std::string GetNotificationId() = 0;
 
   // Overridden from SystemTrayItem.
   views::View* CreateTrayView(user::LoginStatus status) override = 0;
   views::View* CreateDefaultView(user::LoginStatus status) override = 0;
   void DestroyTrayView() override;
   void DestroyDefaultView() override;
-  void UpdateAfterShelfAlignmentChange(ShelfAlignment alignment) override;
+  void UpdateAfterShelfAlignmentChange(wm::ShelfAlignment alignment) override;
 
  private:
   tray::ScreenTrayView* tray_view_;
   tray::ScreenStatusView* default_view_;
   bool is_started_;
   base::Closure stop_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(ScreenTrayItem);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_CHROMEOS_SCREEN_TRAY_ITEM_H_