Run RemoveArcData after a user has opted out

components/arc/userdata/arc_user_data_service.cc

Index: components/arc/userdata/arc_user_data_service.cc
diff --git a/components/arc/userdata/arc_user_data_service.cc b/components/arc/userdata/arc_user_data_service.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6e65ab8ac342b60a8ecf1ce3ab72bc0f8821674d
--- /dev/null
+++ b/components/arc/userdata/arc_user_data_service.cc
@@ -0,0 +1,80 @@
+// 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/userdata/arc_user_data_service.h"
+
+#include "chrome/common/pref_names.h"
+#include "chromeos/dbus/dbus_thread_manager.h"
+#include "chromeos/dbus/session_manager_client.h"
+#include "components/prefs/pref_service.h"
+#include "components/signin/core/account_id/account_id.h"
+#include "components/user_manager/user.h"
+#include "components/user_manager/user_manager.h"
+
+namespace arc {
+
+namespace {
+
+// Weak Pointer.  This class is owned by ChromeBrowserMainPartsChromeos.

[Luis Héctor Chávez, 2016/05/17 16:11:55]

nit: it's now owned by ArcServiceManager.

[dspaid, 2016/05/18 00:11:24]

Done.

+ArcUserDataService* g_arc_user_data_service = nullptr;
+
+}  // namespace
+
+ArcUserDataService::ArcUserDataService() {
+  DCHECK(!g_arc_user_data_service);
+  g_arc_user_data_service = this;
+  ArcBridgeService::Get()->AddObserver(this);
+}
+
+ArcUserDataService::~ArcUserDataService() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  DCHECK(g_arc_user_data_service == this);
+  ArcBridgeService::Get()->RemoveObserver(this);
+  g_arc_user_data_service = nullptr;
+}
+
+// static
+ArcUserDataService* ArcUserDataService::Get() {
+  DCHECK(g_arc_user_data_service);
+  DCHECK(g_arc_user_data_service->thread_checker_.CalledOnValidThread());
+  return g_arc_user_data_service;
+}
+
+void ArcUserDataService::OnStateChanged(ArcBridgeService::State state) {

[Luis Héctor Chávez, 2016/05/17 16:11:55]

OnStateChanged was added for tests and I'd like to avoid adding more consumers.
Can you add a OnBridgeReady() and OnBridgeStopped() to the Observer? I'll go fix
the other non-test consumer of OnStateChanged() later.

[dspaid, 2016/05/18 00:11:24]

Done.

+  DCHECK(g_arc_user_data_service->thread_checker_.CalledOnValidThread());
+  if (state != ArcBridgeService::State::STOPPED) {
+    return;
+  }
+  if (user_prefs_ == nullptr) {
+    LOG(WARNING) << "User has not logged in";
+    return;
+  }
+  const AccountId& account_id =
+      user_manager::UserManager::Get()->GetPrimaryUser()->GetAccountId();
+  if (account_id != user_prefs_account_id_) {
+    LOG(WARNING) << "User preferences not loaded for primary user";
+    user_prefs_ = nullptr;
+    user_prefs_account_id_ = EmptyAccountId();
+    return;
+  }
+  ClearIfDisabled(user_prefs_, account_id);
+}
+
+void ArcUserDataService::ClearIfDisabled(PrefService* user_prefs,
+                                         const AccountId& account_id) {
+  DCHECK(g_arc_user_data_service->thread_checker_.CalledOnValidThread());
+  user_prefs_ = user_prefs;
+  user_prefs_account_id_ = account_id;
+  if (ArcBridgeService::Get()->state() != ArcBridgeService::State::STOPPED) {
+    LOG(ERROR) << "ARC instance not stopped, user data can't be cleared";
+  }

[Luis Héctor Chávez, 2016/05/17 16:11:55]

Shouldn't you return if it's not stopped?

[dspaid, 2016/05/18 00:11:24]

Done.

+  if (user_prefs->GetBoolean(prefs::kArcEnabled)) {
+    return;
+  }
+  chromeos::SessionManagerClient* session_manager_client =
+      chromeos::DBusThreadManager::Get()->GetSessionManagerClient();
+  session_manager_client->RemoveArcData();
+}
+
+}  // namespace arc