[NaCl SDK] Consistent use of copyright header.

native_client_sdk/src/libraries/nacl_io/mount_node_html5fs.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_html5fs.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <ppapi/c/pp_completion_callback.h>
 #include <ppapi/c/pp_directory_entry.h>
 #include <ppapi/c/pp_errors.h>
 #include <ppapi/c/pp_file_info.h>
 #include <ppapi/c/ppb_file_io.h>
@@ skipping 287 matching lines @@
   }
 
   mount_->ppapi()->ReleaseResource(fileref_resource_);
   fileio_resource_ = 0;
   fileref_resource_ = 0;
   MountNode::Destroy();
 }
 
 }  // namespace nacl_io