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

native_client_sdk/src/libraries/nacl_io/httpfs/http_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/httpfs/http_fs.h"
 
 #include <assert.h>
 #include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>
@@ skipping 23 matching lines @@
   bool upper = true;
   for (size_t i = 0; i < s.length(); ++i) {
     char c = s[i];
     result += upper ? toupper(c) : tolower(c);
     upper = c == '-';
   }
 
   return result;
 }
 
-Error HttpFs::Open(const Path& path, int open_flags, ScopedNode* out_node) {
+Error HttpFs::OpenWithMode(const Path& path, int open_flags, mode_t mode,
+                           ScopedNode* out_node) {
   out_node->reset(NULL);
 
   ScopedNode node = FindExistingNode(path);
   if (node.get() != NULL) {
     *out_node = node;
     return 0;
   }
 
   // If we can't find the node in the cache, create it
   std::string url = MakeUrl(path);
@@ skipping 349 matching lines @@
   *out_manifest = text;
   return 0;
 }
 
 std::string HttpFs::MakeUrl(const Path& path) {
   return url_root_ +
          (path.IsAbsolute() ? path.Range(1, path.Size()) : path.Join());
 }
 
 }  // namespace nacl_io