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

ppapi/c/private/ppb_nacl_private.h

Index: ppapi/c/private/ppb_nacl_private.h
diff --git a/ppapi/c/private/ppb_nacl_private.h b/ppapi/c/private/ppb_nacl_private.h
index e275a909bdb3ac6bdaaae63ca805bd63bf505a58..98a69a54759ff4f0ed52745c11cae6382e57dd58 100644
--- a/ppapi/c/private/ppb_nacl_private.h
+++ b/ppapi/c/private/ppb_nacl_private.h
@@ -1,4 +1,4 @@
-// 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.
 
@@ -33,6 +33,12 @@ struct PPB_NaCl_Private {
 
   // 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_