RFC: Add an interface for having the browser open a pnacl support file

ppapi/c/private/ppb_nacl_private.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
 #ifndef PPAPI_C_PRIVATE_PPB_NACL_UTIL_PRIVATE_H_
 #define PPAPI_C_PRIVATE_PPB_NACL_UTIL_PRIVATE_H_
 
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/pp_stdint.h"
 
 #define PPB_NACL_PRIVATE_INTERFACE "PPB_NaCl(Private);0.2"
@@ skipping 14 matching lines @@
   // /dev/urandom.  On non-POSIX systems, this function returns 0.
   int (*UrandomFD)(void);
 
   // Whether the Pepper 3D interfaces should be disabled in the NaCl PPAPI
   // proxy. This is so paranoid admins can effectively prevent untrusted shader
   // code to be processed by the graphics stack.
   bool (*Are3DInterfacesDisabled)();
 
   // Enables the creation of sel_ldr processes from other than the main thread.
   void (*EnableBackgroundSelLdrLaunch)();
+
+  // Returns a read-only file descriptor of a file rooted in the Pnacl
+  // component directory, or -1 on error.
+  // Do we want this to take a completion callback and be async, or
+  // or could we make this happen on another thread?
+  int (*GetReadonlyPnaclFd)(const char* filename);
 };
 
 #endif  // PPAPI_C_PRIVATE_PPB_NACL_PRIVATE_H_