Move thread_pool.h into utils so it can be shared by more than one example.

native_client_sdk/src/libraries/nacl_io/mount_node.cc

 /* Copyright (c) 2012 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 "nacl_io/mount_node.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <string.h>
 #include <sys/stat.h>
 #include <string>
 
 #include "nacl_io/kernel_wrap_real.h"
 #include "nacl_io/mount.h"
 #include "nacl_io/osmman.h"
-#include "utils/auto_lock.h"
+#include "sdk_util/auto_lock.h"
 
 static const int USR_ID = 1001;
 static const int GRP_ID = 1002;
 
 MountNode::MountNode(Mount* mount)
     : mount_(mount) {
   memset(&stat_, 0, sizeof(stat_));
   stat_.st_gid = GRP_ID;
   stat_.st_uid = USR_ID;
 
@@ skipping 136 matching lines @@
 
 void MountNode::Link() {
   Acquire();
   stat_.st_nlink++;
 }
 
 void MountNode::Unlink() {
   stat_.st_nlink--;
   Release();
 }