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

chrome/browser/chromeos/arc/arc_boot_error_notification.h

Index: chrome/browser/chromeos/arc/arc_boot_error_notification.h
diff --git a/chrome/browser/chromeos/arc/arc_boot_error_notification.h b/chrome/browser/chromeos/arc/arc_boot_error_notification.h
new file mode 100644
index 0000000000000000000000000000000000000000..322806ffbf7eb15fed65388bbf50306b589c3bf7
--- /dev/null
+++ b/chrome/browser/chromeos/arc/arc_boot_error_notification.h
@@ -0,0 +1,30 @@
+// 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 {
+
+// Watches for ARC boot errors and show notifications.
+class ArcBootErrorNotification : public ArcService,
+                                 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_