[Sync] Separate purge types step from sync manager configuration.

components/sync/engine/fake_sync_manager.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_ENGINE_FAKE_SYNC_MANAGER_H_
 #define COMPONENTS_SYNC_ENGINE_FAKE_SYNC_MANAGER_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 58 matching lines @@
   // Block until the sync thread has finished processing any pending messages.
   void WaitForSyncThread();
 
   // SyncManager implementation.
   // Note: we treat whatever message loop this is called from as the sync
   // loop for purposes of callbacks.
   void Init(InitArgs* args) override;
   ModelTypeSet InitialSyncEndedTypes() override;
   ModelTypeSet GetTypesWithEmptyProgressMarkerToken(
       ModelTypeSet types) override;
-  bool PurgePartiallySyncedTypes() override;
+  void PurgePartiallySyncedTypes() override;
+  void PurgeDisabledTypes(ModelTypeSet to_purge,
+                          ModelTypeSet to_journal,
+                          ModelTypeSet to_unapply) override;
   void UpdateCredentials(const SyncCredentials& credentials) override;
   void StartSyncingNormally(const ModelSafeRoutingInfo& routing_info,
                             base::Time last_poll_time) override;
   void ConfigureSyncer(ConfigureReason reason,
                        ModelTypeSet to_download,
-                       ModelTypeSet to_purge,
-                       ModelTypeSet to_journal,
-                       ModelTypeSet to_unapply,
                        const ModelSafeRoutingInfo& new_routing_info,
                        const base::Closure& ready_task,
                        const base::Closure& retry_task) override;
   void OnIncomingInvalidation(
       ModelType type,
       std::unique_ptr<InvalidationInterface> interface) override;
   void SetInvalidatorEnabled(bool invalidator_enabled) override;
   void AddObserver(Observer* observer) override;
   void RemoveObserver(Observer* observer) override;
   SyncStatus GetDetailedStatus() const override;
@@ skipping 51 matching lines @@
 
   // Number of invalidations received since startup.
   int num_invalidations_received_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeSyncManager);
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_ENGINE_FAKE_SYNC_MANAGER_H_