[NaCl SDK] Consistent use of copyright header.

native_client_sdk/src/libraries/nacl_io/mount_node_dir.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.
- */
+// 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_dir.h"
 
 #include <errno.h>
 #include <string.h>
 
 #include "nacl_io/osdirent.h"
 #include "nacl_io/osstat.h"
 #include "sdk_util/auto_lock.h"
 #include "sdk_util/macros.h"
 
@@ skipping 125 matching lines @@
       cache_[index].d_off = sizeof(struct dirent);
       cache_[index].d_reclen = sizeof(struct dirent);
       cache_[index].d_name[len] = 0;
       strncpy(cache_[index].d_name, &it->first[0], len);
     }
   }
 }
 
 }  // namespace nacl_io