[Sync] Split DirectoryChangeListener for thread-safety

chrome/browser/sync/util/logging.cc

+// Copyright (c) 2011 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/util/logging.h"
+
+#include "base/tracked.h"
+
+namespace browser_sync {
+
+bool VlogIsOnForLocation(const tracked_objects::Location& from_here,
+                         int verbose_level) {
+  return (verbose_level <=
+          logging::GetVlogLevelHelper(
+              from_here.file_name(), ::strlen(from_here.file_name())));
+}
+
+}  // namespace browser_sync