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

components/sync/engine_impl/sync_manager_impl.h

 // Copyright 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_IMPL_SYNC_MANAGER_IMPL_H_
 #define COMPONENTS_SYNC_ENGINE_IMPL_SYNC_MANAGER_IMPL_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 49 matching lines @@
  public:
   // Create an uninitialized SyncManager.  Callers must Init() before using.
   explicit SyncManagerImpl(const std::string& name);
   ~SyncManagerImpl() override;
 
   // SyncManager implementation.
   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 SetInvalidatorEnabled(bool invalidator_enabled) override;
   void OnIncomingInvalidation(
       ModelType type,
       std::unique_ptr<InvalidationInterface> invalidation) override;
   void AddObserver(SyncManager::Observer* observer) override;
   void RemoveObserver(SyncManager::Observer* observer) override;
   SyncStatus GetDetailedStatus() const override;
@@ skipping 123 matching lines @@
 
   // Determine if any of the fields made visible to clients of the Sync API
   // differ between the versions of an entry stored in |a| and |b|. A return
   // value of false means that it should be OK to ignore this change.
   bool VisiblePropertiesDiffer(const syncable::EntryKernelMutation& mutation,
                                Cryptographer* cryptographer) const;
 
   // Open the directory named with |username|.
   bool OpenDirectory(const std::string& username);
 
-  // Purge those disabled types as specified by |to_purge|. |to_journal| and
-  // |to_unapply| specify subsets that require special handling. |to_journal|
-  // types are saved into the delete journal, while |to_unapply| have only
-  // their local data deleted, while their server data is preserved.
-  bool PurgeDisabledTypes(ModelTypeSet to_purge,
-                          ModelTypeSet to_journal,
-                          ModelTypeSet to_unapply);
-
   void RequestNudgeForDataTypes(const tracked_objects::Location& nudge_location,
                                 ModelTypeSet type);
 
   // If this is a deletion for a password, sets the legacy
   // ExtraPasswordChangeRecordData field of |buffer|. Otherwise sets
   // |buffer|'s specifics field to contain the unencrypted data.
   void SetExtraChangeRecordData(int64_t id,
                                 ModelType type,
                                 ChangeReorderBuffer* buffer,
                                 Cryptographer* cryptographer,
@@ skipping 91 matching lines @@
   std::unique_ptr<SyncEncryptionHandlerImpl> sync_encryption_handler_;
 
   base::WeakPtrFactory<SyncManagerImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncManagerImpl);
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_ENGINE_IMPL_SYNC_MANAGER_IMPL_H_