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

native_client_sdk/src/libraries/nacl_io/jsfs/js_fs.h

 // Copyright 2014 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.
 
 #ifndef LIBRARIES_NACL_IO_JSFS_JS_FS_H_
 #define LIBRARIES_NACL_IO_JSFS_JS_FS_H_
 
 #include <pthread.h>
 #include <stdarg.h>
 
@@ skipping 17 matching lines @@
  public:
   typedef uint32_t RequestId;
 
  protected:
   JsFs();
 
   virtual Error Init(const FsInitArgs& args);
   virtual void Destroy();
 
  public:
-  virtual Error Open(const Path& path, int mode, ScopedNode* out_node);
+  virtual Error OpenWithMode(const Path& path, int open_flags, mode_t mode,
+                             ScopedNode* out_node);
   virtual Error Unlink(const Path& path);
   virtual Error Mkdir(const Path& path, int perm);
   virtual Error Rmdir(const Path& path);
   virtual Error Remove(const Path& path);
   virtual Error Rename(const Path& path, const Path& newpath);
   virtual Error Filesystem_VIoctl(int request, va_list args);
 
  private:
   bool SetDictVar(PP_Var dict, const char* key, PP_Var value);
   PP_Var GetDictVar(PP_Var dict, const char* key);
@@ skipping 26 matching lines @@
   pthread_cond_t response_cond_;  // protected by lock_.
   ResponseMap_t responses_;       // protected by lock_.
 
   friend class JsFsNode;
   DISALLOW_COPY_AND_ASSIGN(JsFs);
 };
 
 }  // namespace nacl_io
 
 #endif  // LIBRARIES_NACL_IO_JSFS_JS_FS_H_