Pref service: Add initial support for pref registration.

services/preferences/pref_store_manager_impl.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 SERVICES_PREFERENCES_PREF_STORE_MANAGER_IMPL_H_
 #define SERVICES_PREFERENCES_PREF_STORE_MANAGER_IMPL_H_
 
 #include <memory>
 #include <set>
 #include <unordered_map>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "components/prefs/pref_value_store.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"
 
+class DefaultPrefStore;
+
 namespace base {
 class SequencedWorkerPool;
 }
 
 namespace prefs {
 class PersistentPrefStoreImpl;
+class PrefStoreImpl;
 
 // This class mediates the connection of clients who wants to read preferences
 // and the pref stores that store those preferences. Pref stores use the
 // |PrefStoreRegistry| interface to register themselves with the manager and
 // clients use the |PrefStoreConnector| interface to connect to these stores.
 class PrefStoreManagerImpl
     : public mojom::PrefStoreRegistry,
       public mojom::PrefStoreConnector,
       public service_manager::InterfaceFactory<mojom::PrefStoreConnector>,
       public service_manager::InterfaceFactory<mojom::PrefStoreRegistry>,
@@ skipping 10 matching lines @@
 
  private:
   using PrefStorePtrs =
       std::unordered_map<PrefValueStore::PrefStoreType, mojom::PrefStorePtr>;
 
   // mojom::PrefStoreRegistry:
   void Register(PrefValueStore::PrefStoreType type,
                 mojom::PrefStorePtr pref_store_ptr) override;
 
   // mojom::PrefStoreConnector:
-  void Connect(const ConnectCallback& callback) override;
+  void Connect(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::InterfaceFactory<PrefStoreRegistry>:
   void Create(const service_manager::Identity& remote_identity,
               prefs::mojom::PrefStoreRegistryRequest request) override;
 
   // service_manager::InterfaceFactory<PrefServiceControl>:
   void Create(const service_manager::Identity& remote_identity,
               prefs::mojom::PrefServiceControlRequest request) override;
 
   // PrefServiceControl:
   void Init(mojom::PersistentPrefStoreConfigurationPtr configuration) override;
 
   // service_manager::Service:
   void OnStart() override;
   bool OnConnect(const service_manager::ServiceInfo& remote_info,
                  service_manager::InterfaceRegistry* registry) override;
 
   // Called when a PrefStore previously registered using |Register| disconnects.
   void OnPrefStoreDisconnect(PrefValueStore::PrefStoreType type);
 
   // Have all the expected PrefStores connected?
   bool AllConnected() const;
 
   void ProcessPendingConnects();
 
-  void ConnectImpl(const ConnectCallback& callback);
+  void ConnectImpl(mojom::PrefRegistryPtr pref_registry,
+                   const ConnectCallback& callback);
 
   void OnPersistentPrefStoreReady();
 
   // PrefStores that need to register before replying to any Connect calls.
   std::set<PrefValueStore::PrefStoreType> expected_pref_stores_;
 
   // Registered pref stores.
   PrefStorePtrs pref_store_ptrs_;
 
   // We hold on to the connection request callbacks until all expected
   // PrefStores have registered.
-  std::vector<ConnectCallback> pending_callbacks_;
+  std::vector<std::pair<ConnectCallback, mojom::PrefRegistryPtr>>
+      pending_connects_;
 
   mojo::BindingSet<mojom::PrefStoreConnector> connector_bindings_;
   mojo::BindingSet<mojom::PrefStoreRegistry> registry_bindings_;
   std::unique_ptr<PersistentPrefStoreImpl> persistent_pref_store_;
   mojo::Binding<mojom::PrefServiceControl> init_binding_;
 
-  scoped_refptr<base::SequencedWorkerPool> worker_pool_;
+  const scoped_refptr<DefaultPrefStore> defaults_;
+  const std::unique_ptr<PrefStoreImpl> defaults_wrapper_;
+
+  const scoped_refptr<base::SequencedWorkerPool> worker_pool_;
 
   DISALLOW_COPY_AND_ASSIGN(PrefStoreManagerImpl);
 };
 
 }  // namespace prefs
 
 #endif  // SERVICES_PREFERENCES_PREF_STORE_MANAGER_IMPL_H_