mash: switch to the new pref service

chrome/browser/prefs/active_profile_pref_service.h

+// Copyright 2017 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_PREFS_ACTIVE_PROFILE_PREF_SERVICE_H_
+#define CHROME_BROWSER_PREFS_ACTIVE_PROFILE_PREF_SERVICE_H_
+
+#include "base/macros.h"
+#include "mojo/public/cpp/bindings/binding_set.h"
+#include "services/preferences/public/interfaces/preferences.mojom.h"
+#include "services/service_manager/public/cpp/interface_factory.h"
+#include "services/service_manager/public/cpp/service.h"
+
+// A |prefs::mojom::PrefStoreConnector| implementation that forwards connection
+// calls from the root service to the active profile. Used by mash, which runs
+// as the root user, to talk to prefs.
+//
+// TODO(http://crbug.com/705347): Once mash supports several profiles, remove
+// this class and the forwarder service.
+class ActiveProfilePrefService : public prefs::mojom::PrefStoreConnector,
+                                 public service_manager::InterfaceFactory<
+                                     prefs::mojom::PrefStoreConnector>,
+                                 public service_manager::Service {
+ public:
+  ActiveProfilePrefService();
+  ~ActiveProfilePrefService() override;
+
+ private:
+  // prefs::mojom::PrefStoreConnector:
+  void Connect(prefs::mojom::PrefRegistryPtr pref_registry,
+               const ConnectCallback& callback) override;
+
+  // service_manager::InterfaceFactory<PrefStoreConnector>:
+  void Create(const service_manager::Identity& remote_identity,
+              prefs::mojom::PrefStoreConnectorRequest request) override;
+
+  // service_manager::Service:
+  void OnStart() override;
+  bool OnConnect(const service_manager::ServiceInfo& remote_info,
+                 service_manager::InterfaceRegistry* registry) override;
+
+  // Called if forwarding the connection request to the per-profile service
+  // instance failed.
+  void OnConnectError();
+
+  prefs::mojom::PrefStoreConnectorPtr connector_ptr_;
+  mojo::BindingSet<prefs::mojom::PrefStoreConnector> connector_bindings_;
+
+  DISALLOW_COPY_AND_ASSIGN(ActiveProfilePrefService);
+};
+
+#endif  // CHROME_BROWSER_PREFS_ACTIVE_PROFILE_PREF_SERVICE_H_