Convert Window Container Ids to an Enum

ash/touch_hud/mus/touch_hud_application.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/touch_hud/mus/touch_hud_application.h"
 
 #include "ash/public/cpp/shell_window_ids.h"
 #include "ash/touch_hud/touch_hud_renderer.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
@@ skipping 73 matching lines @@
   if (!widget_) {
     widget_ = new views::Widget;
     views::Widget::InitParams params(
         views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
     params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
     params.activatable = views::Widget::InitParams::ACTIVATABLE_NO;
     params.accept_events = false;
     params.delegate = new TouchHudUI(widget_);
     params.mus_properties[ui::mojom::WindowManager::kContainerId_InitProperty] =
         mojo::ConvertTo<std::vector<uint8_t>>(
-            ash::kShellWindowId_OverlayContainer);
+            static_cast<int32_t>(ash::kShellWindowId_OverlayContainer));
     params.show_state = ui::SHOW_STATE_FULLSCREEN;
     widget_->Init(params);
     widget_->Show();
   } else {
     widget_->Close();
     base::MessageLoop::current()->QuitWhenIdle();
   }
 }
 
 void TouchHudApplication::Create(
     const service_manager::Identity& remote_identity,
     mash::mojom::LaunchableRequest request) {
   binding_.Close();
   binding_.Bind(std::move(request));
 }
 
 }  // namespace touch_hud
 }  // namespace ash