[NaCl SDK] Upate atomic ops in nacl_io

native_client_sdk/src/libraries/nacl_io/mount_html5fs.h

 /* 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.
  */
 #ifndef LIBRARIES_NACL_IO_MOUNT_HTML5FS_H_
 #define LIBRARIES_NACL_IO_MOUNT_HTML5FS_H_
 
 #include <pthread.h>
 
 #include "nacl_io/mount.h"
 #include "nacl_io/pepper_interface.h"
 #include "nacl_io/typed_mount_factory.h"
+#include "sdk_util/simple_lock.h"
 
 class MountNode;
 
 class MountHtml5Fs : public Mount {
  public:
   virtual Error Access(const Path& path, int a_mode);
   virtual Error Open(const Path& path, int mode, ScopedMountNode* out_node);
   virtual Error Unlink(const Path& path);
   virtual Error Mkdir(const Path& path, int permissions);
   virtual Error Rmdir(const Path& path);
@@ skipping 10 matching lines @@
   Error BlockUntilFilesystemOpen();
 
  private:
   static void FilesystemOpenCallbackThunk(void* user_data, int32_t result);
   void FilesystemOpenCallback(int32_t result);
 
   PP_Resource filesystem_resource_;
   bool filesystem_open_has_result_;  // protected by lock_.
   Error filesystem_open_error_;      // protected by lock_.
   pthread_cond_t filesystem_open_cond_;
+  SimpleLock lock_;
 
   friend class TypedMountFactory<MountHtml5Fs>;
 };
 
 #endif  // LIBRARIES_NACL_IO_MOUNT_HTML5FS_H_