mash: Migrate SessionStateDelegate access to WmShell.

ash/wm/system_modal_container_layout_manager.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/wm/system_modal_container_layout_manager.h"
 
 #include <cmath>
 
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/shell_window_ids.h"
+#include "ash/common/wm_shell.h"
 #include "ash/shell.h"
 #include "ash/wm/dim_window.h"
 #include "ash/wm/window_util.h"
 #include "base/stl_util.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/client/capture_client.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_property.h"
 #include "ui/compositor/layer.h"
 #include "ui/keyboard/keyboard_controller.h"
@@ skipping 28 matching lines @@
   PositionDialogsAfterWorkAreaResize();
 }
 
 void SystemModalContainerLayoutManager::OnWindowAddedToLayout(
     aura::Window* child) {
   DCHECK(child == modal_background_ ||
          child->type() == ui::wm::WINDOW_TYPE_NORMAL ||
          child->type() == ui::wm::WINDOW_TYPE_POPUP);
   DCHECK(
       container_->id() != kShellWindowId_LockSystemModalContainer ||
-      Shell::GetInstance()->session_state_delegate()->IsUserSessionBlocked());
+      WmShell::Get()->GetSessionStateDelegate()->IsUserSessionBlocked());
   // Since this is for SystemModal, there is no goodd reason to add
   // these window other than MODAL_TYPE_NONE or MODAL_TYPE_SYSTEM.
   // DCHECK to avoid simple mistake.
   DCHECK_NE(child->GetProperty(aura::client::kModalKey), ui::MODAL_TYPE_CHILD);
   DCHECK_NE(child->GetProperty(aura::client::kModalKey), ui::MODAL_TYPE_WINDOW);
 
   child->AddObserver(this);
   if (child->GetProperty(aura::client::kModalKey) == ui::MODAL_TYPE_SYSTEM &&
       child->IsVisible()) {
     AddModalWindow(child);
@@ skipping 197 matching lines @@
 bool SystemModalContainerLayoutManager::DialogIsCentered(
     const gfx::Rect& window_bounds) {
   gfx::Point window_center = window_bounds.CenterPoint();
   gfx::Point container_center = GetUsableDialogArea().CenterPoint();
   return std::abs(window_center.x() - container_center.x()) <
              kCenterPixelDelta &&
          std::abs(window_center.y() - container_center.y()) < kCenterPixelDelta;
 }
 
 }  // namespace ash