ash: Move shelf alignment and auto-hide calls from Shell to Shelf

chrome/browser/chromeos/first_run/steps/tray_step.cc

 // 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.
 
 #include "chrome/browser/chromeos/first_run/steps/tray_step.h"
 
 #include "ash/first_run/first_run_helper.h"
-#include "ash/shell.h"
+#include "ash/shelf/shelf.h"
 #include "base/i18n/rtl.h"
 #include "chrome/browser/chromeos/first_run/step_names.h"
 #include "chrome/browser/ui/webui/chromeos/first_run/first_run_actor.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/size.h"
 
 namespace chromeos {
 namespace first_run {
 
 TrayStep::TrayStep(ash::FirstRunHelper* shell_helper, FirstRunActor* actor)
     : Step(kTrayStep, shell_helper, actor) {
 }
 
 void TrayStep::DoShow() {
   if (!shell_helper()->IsTrayBubbleOpened())
     shell_helper()->OpenTrayBubble();
   gfx::Rect bounds = shell_helper()->GetTrayBubbleBounds();
   actor()->AddRectangularHole(bounds.x(), bounds.y(), bounds.width(),
       bounds.height());
   FirstRunActor::StepPosition position;
   position.SetTop(bounds.y());
-  ash::Shell* shell = ash::Shell::GetInstance();
   ash::wm::ShelfAlignment alignment =
-      shell->GetShelfAlignment(shell->GetPrimaryRootWindow());
+      ash::Shelf::ForPrimaryDisplay()->alignment();
   if ((!base::i18n::IsRTL() && alignment != ash::wm::SHELF_ALIGNMENT_LEFT) ||
       alignment == ash::wm::SHELF_ALIGNMENT_RIGHT)
     position.SetRight(GetOverlaySize().width() - bounds.x());
   else
     position.SetLeft(bounds.right());
   actor()->ShowStepPositioned(name(), position);
 }
 
 }  // namespace first_run
 }  // namespace chromeos