Revert of [Sync] Move //components/sync to the syncer namespace. (patchset #5 id:40001 of https://co

components/sync/driver/backend_migrator.h

 // Copyright (c) 2012 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_SYNC_DRIVER_BACKEND_MIGRATOR_H_
 #define COMPONENTS_SYNC_DRIVER_BACKEND_MIGRATOR_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "components/sync/base/model_type.h"
 #include "components/sync/driver/data_type_manager.h"
 
 namespace syncer {
+struct UserShare;
+}  // namespace syncer
 
+namespace sync_driver {
 class SyncService;
-struct UserShare;
+}
+
+namespace browser_sync {
 
 // Interface for anything that wants to know when the migrator's state
 // changes.
 class MigrationObserver {
  public:
   virtual void OnMigrationStateChange() = 0;
 
  protected:
   virtual ~MigrationObserver();
 };
 
 // A class to perform migration of a datatype pursuant to the 'MIGRATION_DONE'
 // code in the sync protocol definition (protocol/sync.proto).
 class BackendMigrator {
  public:
   enum State {
     IDLE,
     WAITING_TO_START,  // Waiting for previous configuration to finish.
     DISABLING_TYPES,   // Exit criteria: SYNC_CONFIGURE_DONE for
                        // enabled types _excluding_ |to_migrate_| and
                        // empty download progress markers for types
                        // in |to_migrate_|.
     REENABLING_TYPES,  // Exit criteria: SYNC_CONFIGURE_DONE for enabled
                        // types.
   };
 
   // TODO(akalin): Remove the dependency on |user_share|.
   BackendMigrator(const std::string& name,
-                  UserShare* user_share,
-                  SyncService* service,
-                  DataTypeManager* manager,
+                  syncer::UserShare* user_share,
+                  sync_driver::SyncService* service,
+                  sync_driver::DataTypeManager* manager,
                   const base::Closure& migration_done_callback);
   virtual ~BackendMigrator();
 
   // Starts a sequence of events that will disable and reenable |types|.
-  void MigrateTypes(ModelTypeSet types);
+  void MigrateTypes(syncer::ModelTypeSet types);
 
   void AddMigrationObserver(MigrationObserver* observer);
   bool HasMigrationObserver(const MigrationObserver* observer) const;
   void RemoveMigrationObserver(MigrationObserver* observer);
 
   State state() const;
 
   // Called from ProfileSyncService to notify us of configure done.
   // Note: We receive these notifications only when our state is not IDLE.
-  void OnConfigureDone(const DataTypeManager::ConfigureResult& result);
+  void OnConfigureDone(
+      const sync_driver::DataTypeManager::ConfigureResult& result);
 
   // Returns the types that are currently pending migration (if any).
-  ModelTypeSet GetPendingMigrationTypesForTest() const;
+  syncer::ModelTypeSet GetPendingMigrationTypesForTest() const;
 
  private:
   void ChangeState(State new_state);
 
   // Must be called only in state WAITING_TO_START.  If ready to
   // start, meaning the data type manager is configured, calls
   // RestartMigration() and returns true.  Otherwise, does nothing and
   // returns false.
   bool TryStart();
 
   // Restarts migration, interrupting any existing migration.
   void RestartMigration();
 
   // Called by OnConfigureDone().
-  void OnConfigureDoneImpl(const DataTypeManager::ConfigureResult& result);
+  void OnConfigureDoneImpl(
+      const sync_driver::DataTypeManager::ConfigureResult& result);
 
   const std::string name_;
-  UserShare* user_share_;
-  SyncService* service_;
-  DataTypeManager* manager_;
+  syncer::UserShare* user_share_;
+  sync_driver::SyncService* service_;
+  sync_driver::DataTypeManager* manager_;
 
   State state_;
 
   base::ObserverList<MigrationObserver> migration_observers_;
 
-  ModelTypeSet to_migrate_;
+  syncer::ModelTypeSet to_migrate_;
 
   base::Closure migration_done_callback_;
 
   base::WeakPtrFactory<BackendMigrator> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BackendMigrator);
 };
 
-}  // namespace syncer
+}  // namespace browser_sync
 
 #endif  // COMPONENTS_SYNC_DRIVER_BACKEND_MIGRATOR_H_