[SyncFS] Clear dirty flag on changelist application phase

chrome/browser/sync_file_system/drive_backend/list_changes_task.h

Index: chrome/browser/sync_file_system/drive_backend/list_changes_task.h
diff --git a/chrome/browser/sync_file_system/drive_backend/list_changes_task.h b/chrome/browser/sync_file_system/drive_backend/list_changes_task.h
index c594ba3ea02127dbab516b77c32be8ac3d3705bd..b5e2558cc60dd7d3bea88a9c915e16c42e28834e 100644
--- a/chrome/browser/sync_file_system/drive_backend/list_changes_task.h
+++ b/chrome/browser/sync_file_system/drive_backend/list_changes_task.h
@@ -40,6 +40,8 @@ class ListChangesTask : public SyncTask {
                       scoped_ptr<google_apis::ChangeList> change_list);
   void CheckInChangeList(int64 largest_change_id,
                          scoped_ptr<SyncTaskToken> token);
+  void DidCheckInChangeList(scoped_ptr<SyncTaskToken> token,
+                            SyncStatusCode status);
 
   bool IsContextReady();
   MetadataDatabase* metadata_database();
@@ -48,6 +50,8 @@ class ListChangesTask : public SyncTask {
   SyncEngineContext* sync_context_;
   ScopedVector<google_apis::ChangeResource> change_list_;
 
+  std::vector<std::string> file_ids_;
+
   base::WeakPtrFactory<ListChangesTask> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ListChangesTask);