Run RemoveArcData after a user has opted out

components/arc/user_data/arc_user_data_service.h

Index: components/arc/user_data/arc_user_data_service.h
diff --git a/components/arc/user_data/arc_user_data_service.h b/components/arc/user_data/arc_user_data_service.h
new file mode 100644
index 0000000000000000000000000000000000000000..add58a5d2894052910012fabf66e1d034d0b044b
--- /dev/null
+++ b/components/arc/user_data/arc_user_data_service.h
@@ -0,0 +1,46 @@
+// 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 COMPONENTS_ARC_USER_DATA_ARC_USER_DATA_SERVICE
+#define COMPONENTS_ARC_USER_DATA_ARC_USER_DATA_SERVICE
+
+#include "base/macros.h"
+#include "base/threading/thread_checker.h"
+#include "components/arc/arc_bridge_service.h"
+#include "components/signin/core/account_id/account_id.h"
+
+class PrefService;
+
+namespace arc {
+
+class ArcServiceManager;
+class ArcBridgeService;
+
+// This class controls the lifecycle of ARC user data, removing it when
+// necessary.
+class ArcUserDataService : public ArcBridgeService::Observer {
+ public:
+  ArcUserDataService(ArcServiceManager* arc_service_manager);

[Luis Héctor Chávez, 2016/05/20 15:03:59]

|arc_service_manager| can be made const.

[Daniel Erat, 2016/05/20 17:41:06]

add 'explicit' too

[dspaid, 2016/05/23 01:22:37]

Done.

[dspaid, 2016/05/23 01:22:37]

Done.

+  ~ArcUserDataService() override;
+
+  // Checks if arc is both stopped and disabled (opt-out) and triggers removal

[Luis Héctor Chávez, 2016/05/20 15:03:59]

nit: s/opt-out/not opt-in/.

[Daniel Erat, 2016/05/20 17:41:06]

s/arc/ARC/ here and in other comments

[dspaid, 2016/05/23 01:22:37]

Done.

[dspaid, 2016/05/23 01:22:37]

Done.

+  // of user data if both conditions are true.
+  void ClearIfDisabled(const AccountId& account_id);
+
+  // Called whenever the arc bridge is stopped to potentially remove data if
+  // the user has opted out.

[Luis Héctor Chávez, 2016/05/20 15:03:59]

nit: s/opted out/not opted-in/.

[dspaid, 2016/05/23 01:22:37]

Done.

+  // ArcBridgeService::Observer:

[Daniel Erat, 2016/05/20 17:41:06]

nit: move this comment above "Called whenever" (but i'd probably just delete it;
usually overridden methods aren't commented in headers)

[dspaid, 2016/05/23 01:22:37]

Done.

+  void OnBridgeStopped() override;
+
+ private:
+  base::ThreadChecker thread_checker_;
+
+  AccountId user_prefs_account_id_ = EmptyAccountId();

[Daniel Erat, 2016/05/20 17:41:06]

add a comment documenting what this contains; also add a blank line after it

[dspaid, 2016/05/23 01:22:37]

Done.

+  ArcServiceManager* arc_service_manager_;

[Luis Héctor Chávez, 2016/05/20 15:03:58]

nit: const ArcServiceManager* const arc_service_manager_;

[dspaid, 2016/05/23 01:22:37]

Done.

+  DISALLOW_COPY_AND_ASSIGN(ArcUserDataService);

[Daniel Erat, 2016/05/20 17:41:06]

nit: add blank line before this one

[dspaid, 2016/05/23 01:22:37]

Done.

+};
+
+}  // namespace arc
+
+#endif  // COMPONENTS_ARC_USER_DATA_ARC_USER_DATA_SERVICE