Moves app_list() and related functions from Shell to WmShell

ash/shell/content/client/shell_browser_main_parts.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/shell/content/client/shell_browser_main_parts.h"
 
 #include "ash/common/login_status.h"
 #include "ash/common/wm_shell.h"
 #include "ash/content/shell_content_state.h"
 #include "ash/shell.h"
@@ skipping 123 matching lines @@
   ash::WmShell::Get()->CreateShelfView();
   ash::WmShell::Get()->UpdateAfterLoginStatusChange(LoginStatus::USER);
 
   window_watcher_.reset(new ash::shell::WindowWatcher);
   display::Screen::GetScreen()->AddObserver(window_watcher_.get());
 
   ash::shell::InitWindowTypeLauncher();
 
   // Initialize the example app list presenter.
   example_app_list_presenter_ = base::MakeUnique<ExampleAppListPresenter>();
-  WmShell::Get()->app_list()->SetAppListPresenter(
+  Shell::Get()->app_list()->SetAppListPresenter(
       example_app_list_presenter_->CreateInterfacePtrAndBind());
 
   ash::Shell::GetPrimaryRootWindow()->GetHost()->Show();
 }
 
 void ShellBrowserMainParts::PostMainMessageLoopRun() {
   display::Screen::GetScreen()->RemoveObserver(window_watcher_.get());
 
   window_watcher_.reset();
   delegate_ = nullptr;
@@ skipping 14 matching lines @@
   browser_context_.reset();
 }
 
 bool ShellBrowserMainParts::MainMessageLoopRun(int* result_code) {
   base::RunLoop().Run();
   return true;
 }
 
 }  // namespace shell
 }  // namespace ash