Fixed shutdown concurrency issues in FilePathWatcher.

chrome/browser/policy/file_based_policy_loader.cc

 // Copyright (c) 2010 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/policy/file_based_policy_loader.h"
 
+#include "content/browser/browser_thread.h"
+
 namespace {
 
 // Amount of time we wait for the files on disk to settle before trying to load
 // them. This alleviates the problem of reading partially written files and
 // makes it possible to batch quasi-simultaneous changes.
 const int kSettleIntervalSeconds = 5;
 
 // The time interval for rechecking policy. This is our fallback in case the
 // delegate never reports a change to the ReloadObserver.
 const int kReloadIntervalMinutes = 15;
@@ skipping 118 matching lines @@
   base::TimeDelta age = now - last_modification_clock_;
   if (age < settle_interval_) {
     *delay = settle_interval_ - age;
     return false;
   }
 
   return true;
 }
 
 }  // namespace policy