Plumbing though mode parameter to open, since fusefs can make use of it.

native_client_sdk/src/libraries/nacl_io/html5fs/html5_fs.cc

 // Copyright 2013 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/html5fs/html5_fs.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <stdlib.h>
 #include <string.h>
@@ skipping 11 matching lines @@
 namespace {
 
 #if defined(WIN32)
 int64_t strtoull(const char* nptr, char** endptr, int base) {
   return _strtoui64(nptr, endptr, base);
 }
 #endif
 
 }  // namespace
 
-Error Html5Fs::Open(const Path& path, int open_flags, ScopedNode* out_node) {
+Error Html5Fs::OpenWithMode(const Path& path, int open_flags, mode_t mode,
+                            ScopedNode* out_node) {
   out_node->reset(NULL);
   Error error = BlockUntilFilesystemOpen();
   if (error)
     return error;
 
   PP_Resource fileref = file_ref_iface_->Create(
       filesystem_resource_, GetFullPath(path).Join().c_str());
   if (!fileref)
     return ENOENT;
 
@@ skipping 248 matching lines @@
 }
 
 void Html5Fs::FilesystemOpenCallback(int32_t result) {
   AUTO_LOCK(filesysem_open_lock_);
   filesystem_open_has_result_ = true;
   filesystem_open_error_ = PPErrorToErrno(result);
   pthread_cond_signal(&filesystem_open_cond_);
 }
 
 }  // namespace nacl_io