SyncFS: Deleting iterator before closing database.

chrome/browser/sync_file_system/local/local_file_change_tracker.cc

Index: chrome/browser/sync_file_system/local/local_file_change_tracker.cc
diff --git a/chrome/browser/sync_file_system/local/local_file_change_tracker.cc b/chrome/browser/sync_file_system/local/local_file_change_tracker.cc
index 83334300e250c6c34c37ac167794e5f861ea29d0..a97612c449215630102de83119f410cd6353734a 100644
--- a/chrome/browser/sync_file_system/local/local_file_change_tracker.cc
+++ b/chrome/browser/sync_file_system/local/local_file_change_tracker.cc
@@ -599,6 +599,7 @@ SyncStatusCode LocalFileChangeTracker::TrackerDB::GetDirtyEntries(
       LOG(WARNING) << "Failed to deserialize an URL. "
                    << "TrackerDB might be corrupted.";
       db_status_ = SYNC_DATABASE_ERROR_CORRUPTION;
+      iter.reset();  // Must delete before closing the database.
       db_.reset();
       return db_status_;
     }