mash: Migrate AccessibilityDelegate access to WmShell.

ash/wm/lock_state_controller.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 "ash/wm/lock_state_controller.h"
 
 #include <algorithm>
 #include <string>
 #include <utility>
 
@@ skipping 297 matching lines @@
 
 void LockStateController::StartRealShutdownTimer(bool with_animation_time) {
   base::TimeDelta duration =
       base::TimeDelta::FromMilliseconds(kShutdownRequestDelayMs);
   if (with_animation_time) {
     duration +=
         animator_->GetDuration(SessionStateAnimator::ANIMATION_SPEED_SHUTDOWN);
   }
 
 #if defined(OS_CHROMEOS)
-  const AccessibilityDelegate* const delegate =
-      Shell::GetInstance()->accessibility_delegate();
-  base::TimeDelta sound_duration = delegate->PlayShutdownSound();
+  base::TimeDelta sound_duration =
+      WmShell::Get()->GetAccessibilityDelegate()->PlayShutdownSound();
   sound_duration =
       std::min(sound_duration,
                base::TimeDelta::FromMilliseconds(kMaxShutdownSoundDurationMs));
   duration = std::max(duration, sound_duration);
 #endif
 
   real_shutdown_timer_.Start(
       FROM_HERE, duration, base::Bind(&LockStateController::OnRealPowerTimeout,
                                       base::Unretained(this)));
 }
@@ skipping 264 matching lines @@
     SessionStateAnimator::AnimationSequence* animation_sequence) {
   if (unlocked_properties_.get() &&
       unlocked_properties_->background_is_hidden) {
     animation_sequence->StartAnimation(SessionStateAnimator::DESKTOP_BACKGROUND,
                                        SessionStateAnimator::ANIMATION_FADE_OUT,
                                        speed);
   }
 }
 
 }  // namespace ash