[SyncFS] Demote local file changes before local-to-remote sync (3/3)

chrome/browser/sync_file_system/local/local_file_change_tracker.cc

 // 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.
 
 #include "chrome/browser/sync_file_system/local/local_file_change_tracker.h"
 
 #include <queue>
 
 #include "base/location.h"
 #include "base/logging.h"
@@ skipping 225 matching lines @@
     return;
 
   FileChangeList::List change_list = iter->second.change_list.list();
   // Make sure that this URL is in no queues.
   DCHECK(!ContainsKey(change_seqs_, iter->second.change_seq));
   DCHECK(!ContainsKey(changes_, url));
 
   change_seqs_[iter->second.change_seq] = url;
   changes_.insert(*iter);
   demoted_changes_.erase(iter);
+  UpdateNumChanges();
 }
 
 bool LocalFileChangeTracker::PromoteDemotedChanges() {
   DCHECK(file_task_runner_->RunsTasksOnCurrentThread());
   if (demoted_changes_.empty())
     return false;
   while (!demoted_changes_.empty()) {
     fileapi::FileSystemURL url = demoted_changes_.begin()->first;
     PromoteDemotedChangesForURL(url);
   }
@@ skipping 351 matching lines @@
   if (!status.ok() && !status.IsNotFound()) {
     HandleError(FROM_HERE, status);
     db_status_ = LevelDBStatusToSyncStatusCode(status);
     db_.reset();
     return db_status_;
   }
   return SYNC_STATUS_OK;
 }
 
 }  // namespace sync_file_system