[SyncFS] Clear dirty flag on changelist application phase

chrome/browser/sync_file_system/drive_backend/metadata_database.h

 // Copyright 2013 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_SYNC_FILE_SYSTEM_DRIVE_BACKEND_METADATA_DATABASE_H_
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_METADATA_DATABASE_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 325 matching lines @@
   size_t CountFileMetadata() const;
   size_t CountFileTracker() const;
 
   bool GetMultiParentFileTrackers(std::string* file_id,
                                   TrackerIDSet* trackers);
   bool GetConflictingTrackers(TrackerIDSet* trackers);
 
   // Sets |app_ids| to a list of all registered app ids.
   void GetRegisteredAppIDs(std::vector<std::string>* app_ids);
 
+  // Clears dirty flag of trackers that can be cleared without external
+  // interactien.
+  void SweepDirtyTrackers(const SyncStatusCallback& callback);
+
  private:
   friend class MetadataDatabaseTest;
   struct CreateParam;
 
   MetadataDatabase(base::SequencedTaskRunner* worker_task_runner,
                    const base::FilePath& database_path,
                    leveldb::Env* env_override);
   static void CreateOnWorkerTaskRunner(
       scoped_ptr<CreateParam> create_param,
       const CreateCallback& callback);
@@ skipping 40 matching lines @@
 
   void AttachSyncRoot(const google_apis::FileResource& sync_root_folder);
   void AttachInitialAppRoot(const google_apis::FileResource& app_root_folder);
 
   void ForceActivateTrackerByPath(int64 parent_tracker_id,
                                   const std::string& title,
                                   const std::string& file_id);
 
   void DetachFromSequence();
 
+  void VisitTrackerToSweep(std::vector<int64>* tracker_ids, int64 tracker_id);
+
   scoped_refptr<base::SequencedTaskRunner> worker_task_runner_;
   base::FilePath database_path_;
   leveldb::Env* env_override_;
   scoped_ptr<LevelDBWrapper> db_;
 
   int64 largest_known_change_id_;
 
   scoped_ptr<MetadataDatabaseIndexInterface> index_;
 
   base::WeakPtrFactory<MetadataDatabase> weak_ptr_factory_;
 
   base::SequenceChecker worker_sequence_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(MetadataDatabase);
 };
 
 }  // namespace drive_backend
 }  // namespace sync_file_system
 
 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_METADATA_DATABASE_H_