mash: Migrate shelf app list button to wm common types

ash/accelerators/accelerator_controller_delegate_aura.cc

 // Copyright 2016 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/accelerators/accelerator_controller_delegate_aura.h"
 
 #include <algorithm>
 #include <cmath>
 #include <string>
 #include <utility>
@@ skipping 318 matching lines @@
     // feature uses. crbug.com/132296
     if (WmShell::Get()->accessibility_delegate()->IsSpokenFeedbackEnabled())
       return false;
   }
   return true;
 }
 
 void HandleToggleAppList(const ui::Accelerator& accelerator) {
   if (accelerator.key_code() == ui::VKEY_LWIN)
     base::RecordAction(UserMetricsAction("Accel_Search_LWin"));
-  Shell::GetInstance()->ToggleAppList(nullptr);
+  WmShell::Get()->ToggleAppList();
 }
 
 bool CanHandleUnpin() {
   wm::WindowState* window_state = wm::GetActiveWindowState();
   return window_state && window_state->IsPinned();
 }
 
 #if defined(OS_CHROMEOS)
 void HandleCrosh() {
   base::RecordAction(UserMetricsAction("Accel_Open_Crosh"));
@@ skipping 349 matching lines @@
           message_center::NotifierId(
               message_center::NotifierId::SYSTEM_COMPONENT,
               system_notifier::kNotifierDeprecatedAccelerator),
           message_center::RichNotificationData(),
           new DeprecatedAcceleratorNotificationDelegate));
   message_center::MessageCenter::Get()->AddNotification(
       std::move(notification));
 }
 
 }  // namespace ash