Run RemoveArcData after a user has opted out

components/arc/user_data/arc_user_data_service.cc

Index: components/arc/user_data/arc_user_data_service.cc
diff --git a/components/arc/user_data/arc_user_data_service.cc b/components/arc/user_data/arc_user_data_service.cc
new file mode 100644
index 0000000000000000000000000000000000000000..27d42d729bc0b27044c87efc9241460aa2916e5c
--- /dev/null
+++ b/components/arc/user_data/arc_user_data_service.cc
@@ -0,0 +1,60 @@
+// 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 "components/arc/user_data/arc_user_data_service.h"
+
+#include "chromeos/cryptohome/cryptohome_parameters.h"
+#include "chromeos/dbus/dbus_thread_manager.h"
+#include "chromeos/dbus/session_manager_client.h"
+#include "components/prefs/pref_member.h"
+#include "components/signin/core/account_id/account_id.h"
+#include "components/user_manager/user_manager.h"
+
+namespace arc {
+
+ArcUserDataService::ArcUserDataService(
+    ArcBridgeService* bridge_service,
+    std::unique_ptr<BooleanPrefMember> arc_enabled_pref,
+    const AccountId& account_id)
+    : ArcService(bridge_service),
+      arc_enabled_pref_(std::move(arc_enabled_pref)),
+      primary_user_account_id_(account_id) {
+  arc_bridge_service()->AddObserver(this);
+  ClearIfDisabled();
+}
+
+ArcUserDataService::~ArcUserDataService() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  arc_bridge_service()->RemoveObserver(this);
+}
+
+void ArcUserDataService::OnBridgeStopped() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  const AccountId& account_id =
+      user_manager::UserManager::Get()->GetPrimaryUser()->GetAccountId();
+  if (account_id != primary_user_account_id_) {
+    LOG(ERROR) << "User preferences not loaded for "
+               << primary_user_account_id_.GetUserEmail()
+               << ", but current primary user is " << account_id.GetUserEmail();
+    primary_user_account_id_ = EmptyAccountId();
+    return;
+  }
+  ClearIfDisabled();
+}
+
+void ArcUserDataService::ClearIfDisabled() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  if (arc_bridge_service()->state() != ArcBridgeService::State::STOPPED) {
+    LOG(ERROR) << "ARC instance not stopped, user data can't be cleared";
+    return;
+  }
+  if (arc_enabled_pref_->GetValue())
+    return;
+  const cryptohome::Identification cryptohome_id(primary_user_account_id_);
+  chromeos::SessionManagerClient* session_manager_client =
+      chromeos::DBusThreadManager::Get()->GetSessionManagerClient();
+  session_manager_client->RemoveArcData(cryptohome_id);
+}
+
+}  // namespace arc