Fixed shutdown concurrency issues in FilePathWatcher.

chrome/browser/file_path_watcher/file_path_watcher_inotify.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/file_path_watcher/file_path_watcher.h"
 
 #include <errno.h>
 #include <string.h>
 #include <sys/inotify.h>
 #include <sys/ioctl.h>
 #include <sys/select.h>
 #include <unistd.h>
 
 #include <algorithm>
 #include <set>
 #include <utility>
 #include <vector>
 
 #include "base/eintr_wrapper.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/hash_tables.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/scoped_ptr.h"
 #include "base/synchronization/lock.h"
 #include "base/task.h"
 #include "base/threading/thread.h"
+#include "content/browser/browser_thread.h"
 
 namespace {
 
 class FilePathWatcherImpl;
 
 // Singleton to manage all inotify watches.
 // TODO(tony): It would be nice if this wasn't a singleton.
 // http://crbug.com/38174
 class InotifyReader {
  public:
@@ skipping 364 matching lines @@
   }
 
   return true;
 }
 
 }  // namespace
 
 FilePathWatcher::FilePathWatcher() {
   impl_ = new FilePathWatcherImpl();
 }