Create OOBE screen for Waiting for Container ready

chrome/browser/chromeos/login/screens/wait_for_container_ready_screen.h

+// Copyright 2017 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.
+
+#ifndef CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_WAIT_FOR_CONTAINER_READY_SCREEN_H_
+#define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_WAIT_FOR_CONTAINER_READY_SCREEN_H_
+
+#include <string>
+
+#include "base/macros.h"
+#include "chrome/browser/chromeos/login/screens/base_screen.h"
+
+namespace chromeos {
+
+class WaitForContainerReadyScreenView;
+class BaseScreenDelegate;
+
+class WaitForContainerReadyScreen : public BaseScreen {
+ public:
+  WaitForContainerReadyScreen(BaseScreenDelegate* base_screen_delegate,
+                              WaitForContainerReadyScreenView* view);
+  ~WaitForContainerReadyScreen() override;
+
+  // Called when view is destroyed so there's no dead reference to it.
+  void OnViewDestroyed(WaitForContainerReadyScreenView* view_);
+
+  // BaseScreen:
+  void Show() override;
+  void Hide() override;
+  void OnContainerReady();

[xiyuan, 2017/06/19 16:36:01]

nit: Insert an emtpy line before since this is part of BaseScreen. And add a
brief comment for it.

[yueli, 2017/06/19 18:49:18]

Done.

+
+ private:
+  WaitForContainerReadyScreenView* view_;
+
+  DISALLOW_COPY_AND_ASSIGN(WaitForContainerReadyScreen);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_WAIT_FOR_CONTAINER_READY_SCREEN_H_