[exp] ash: sysui for mash

ash/system/user/tray_user.cc

 // 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.
 
 #include "ash/system/user/tray_user.h"
 
 #include "ash/ash_switches.h"
 #include "ash/root_window_controller.h"
 #include "ash/session/session_state_delegate.h"
 #include "ash/shelf/shelf_layout_manager.h"
@@ skipping 254 matching lines @@
   CHECK(user_info);
   avatar_->SetImage(user_info->GetImage(),
                     gfx::Size(kTrayAvatarSize, kTrayAvatarSize));
 
   // Unit tests might come here with no images for some users.
   if (avatar_->size().IsEmpty())
     avatar_->SetSize(gfx::Size(kTrayAvatarSize, kTrayAvatarSize));
 }
 
 void TrayUser::UpdateLayoutOfItem() {
-  RootWindowController* controller = GetRootWindowController(
-      system_tray()->GetWidget()->GetNativeWindow()->GetRootWindow());
-  if (controller && controller->shelf()) {
-    UpdateAfterShelfAlignmentChange(
-        controller->GetShelfLayoutManager()->GetAlignment());
-  }
+  UpdateAfterShelfAlignmentChange(system_tray()->shelf_alignment());
 }
 
 }  // namespace ash