mash: Support ShelfModel access in Chrome.

chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.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 "chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.h"
 
 #include "ash/public/cpp/mus_property_mirror_ash.h"
 #include "ash/public/cpp/window_pin_type.h"
 #include "ash/public/cpp/window_properties.h"
 #include "ash/public/interfaces/window_pin_type.mojom.h"
@@ skipping 84 matching lines @@
   // screen.
   keyboard::InitializeKeyboard();
 
   ui::SelectFileDialog::SetFactory(new SelectFileDialogExtensionFactory);
 }
 
 void ChromeBrowserMainExtraPartsAsh::PostProfileInit() {
   if (ash_util::IsRunningInMash()) {
     DCHECK(!ash::Shell::HasInstance());
     DCHECK(!ChromeLauncherController::instance());
-    // TODO(crbug.com/557406): Synchronize this ShelfModel with the one in Ash.
     chrome_shelf_model_ = base::MakeUnique<ash::ShelfModel>();
     chrome_launcher_controller_ = base::MakeUnique<ChromeLauncherController>(
         nullptr, chrome_shelf_model_.get());
     chrome_launcher_controller_->Init();
     chrome_shell_content_state_ = base::MakeUnique<ChromeShellContentState>();
   }
 
   cast_config_client_media_router_ =
       base::MakeUnique<CastConfigClientMediaRouter>();
   media_client_ = base::MakeUnique<MediaClient>();
@@ skipping 17 matching lines @@
   volume_controller_.reset();
   new_window_client_.reset();
   system_tray_client_.reset();
   lock_screen_client_.reset();
   media_client_.reset();
   cast_config_client_media_router_.reset();
   session_controller_client_.reset();
 
   ash_init_.reset();
 }