arc: ARC loading progress should not be shown when started from OOBE.

chrome/browser/chromeos/arc/arc_session_manager_data_removed_waiter.h

+// Copyright 2017 The Chromium Authors. All rights reserved.

[hidehiko, 2017/01/30 10:12:35]

Could you mkdir c/b/c/arc/test directory, and put this there,
as we do same thing for components/arc?

[khmel, 2017/01/31 02:47:08]

Done.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_CHROMEOS_ARC_ARC_SESSION_MANAGER_DATA_REMOVED_WAITER_H_
+#define CHROME_BROWSER_CHROMEOS_ARC_ARC_SESSION_MANAGER_DATA_REMOVED_WAITER_H_
+
+#include <memory>
+
+#include "base/macros.h"
+#include "chrome/browser/chromeos/arc/arc_session_manager.h"
+
+namespace base {
+class RunLoop;
+}
+
+namespace arc {
+
+// Waits for ARC data has been removed.
+class ArcSessionManagerDataRemovedWaiter : public ArcSessionManager::Observer {

[hidehiko, 2017/01/30 10:12:35]

Optional: the name looks long now. How about ArcDataRemovedWaiter?
ArcSessionManager is related but it looks the implementation details to me.

[khmel, 2017/01/31 02:47:08]

Done.

+ public:
+  ArcSessionManagerDataRemovedWaiter();
+  ~ArcSessionManagerDataRemovedWaiter() override;
+
+  void Wait();

[hidehiko, 2017/01/30 10:12:35]

Could you document?

[khmel, 2017/01/31 02:47:08]

Done.

+
+  // ArcSessionManager::Observer:
+  void OnArcDataRemoved() override;
+
+ private:
+  std::unique_ptr<base::RunLoop> run_loop_;
+
+  DISALLOW_COPY_AND_ASSIGN(ArcSessionManagerDataRemovedWaiter);
+};
+
+}  // namespace arc
+
+#endif  // CHROME_BROWSER_CHROMEOS_ARC_ARC_SESSION_MANAGER_DATA_REMOVED_WAITER_H_