Do nothing on OnSessionStopped if ARC is being restarted.

chrome/browser/chromeos/arc/notification/arc_boot_error_notification.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 "chrome/browser/chromeos/arc/notification/arc_boot_error_notification.h"
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
-#include "chrome/browser/chromeos/arc/arc_session_manager.h"
 #include "chrome/browser/chromeos/policy/browser_policy_connector_chromeos.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/ui/chrome_pages.h"
 #include "chrome/grit/generated_resources.h"
 #include "components/arc/arc_bridge_service.h"
 #include "components/user_manager/user_manager.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/chromeos/resources/grit/ui_chromeos_resources.h"
 #include "ui/message_center/message_center.h"
@@ skipping 62 matching lines @@
               IDR_DISK_SPACE_NOTIFICATION_CRITICAL)),
           base::UTF8ToUTF16(kDisplaySource), GURL(), notifier_id,
           optional_fields, new LowDiskSpaceErrorNotificationDelegate()));
 }
 
 }  // namespace
 
 ArcBootErrorNotification::ArcBootErrorNotification(
     ArcBridgeService* bridge_service)
     : ArcService(bridge_service) {
-  ArcSessionManager::Get()->AddSessionObserver(this);
+  ArcSessionManager::Get()->AddObserver(this);
 }
 
 ArcBootErrorNotification::~ArcBootErrorNotification() {
-  ArcSessionManager::Get()->RemoveSessionObserver(this);
+  ArcSessionManager::Get()->RemoveObserver(this);
 }
 
-void ArcBootErrorNotification::OnSessionStopped(StopReason reason) {
-  if (reason == StopReason::LOW_DISK_SPACE)
+void ArcBootErrorNotification::OnArcSessionStopped(ArcStopReason reason) {
+  if (reason == ArcStopReason::LOW_DISK_SPACE)
     ShowLowDiskSpaceErrorNotification();
 }
 
 }  // namespace arc