[NaCl SDK] Consistent use of copyright header.

native_client_sdk/src/libraries/nacl_io/mount_mem.cc

-/* Copyright (c) 2012 The hromium 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 hromium 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_mem.h"
 
 #include <errno.h>
 #include <fcntl.h>
 
 #include <string>
 
 #include "nacl_io/mount.h"
 #include "nacl_io/mount_node.h"
 #include "nacl_io/mount_node_dir.h"
@@ skipping 199 matching lines @@
 
   if (file_only && child->IsaDir())
     return EISDIR;
 
   if (remove_dir && child->ChildCount() > 0)
     return ENOTEMPTY;
 
   return parent->RemoveChild(path.Basename());
 }