arc: Abort booting ARC if the device is critically low on disk space.

chrome/browser/chromeos/arc/arc_boot_error_notification.h

+// 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.
+
+#ifndef CHROME_BROWSER_CHROMEOS_ARC_ARC_BOOT_ERROR_NOTIFICATION_H_
+#define CHROME_BROWSER_CHROMEOS_ARC_ARC_BOOT_ERROR_NOTIFICATION_H_
+
+#include "base/macros.h"
+#include "components/arc/arc_bridge_service.h"
+#include "components/arc/arc_service.h"
+
+namespace arc {
+
+class ArcBootErrorNotification : public ArcService,

[hidehiko, 2016/07/14 07:39:40]

Could you briefly summarize what is the responsibility of this class?

[Shuhei Takahashi, 2016/07/14 08:44:27]

Done.

+                                 public ArcBridgeService::Observer {
+ public:
+  explicit ArcBootErrorNotification(ArcBridgeService* bridge_service);
+  ~ArcBootErrorNotification() override;
+
+  // ArcBridgeService::Observer
+  void OnBridgeStopped(ArcBridgeService::StopReason reason) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ArcBootErrorNotification);
+};
+
+}  // namespace arc
+
+#endif  // CHROME_BROWSER_CHROMEOS_ARC_ARC_BOOT_ERROR_NOTIFICATION_H_