Add an interface for nacl to create delete-on-close temp files,

ppapi/api/private/finish_writing_these/ppb_nacl_private.idl

 /* 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.
  */
 
 /* This file contains NaCl private interfaces. */
 
+#include "ppapi/c/private/pp_file_handle.h"
+
 /* PPB_NaCl_Private */
-interface PPB_NaCl_Private_0_6 {
+interface PPB_NaCl_Private_0_7 {
   /* This function launches NaCl's sel_ldr process.  On success, the function
    * returns true, otherwise it returns false.  When it returns true, it will
    * write |socket_count| nacl::Handles to imc_handles.
    */
   bool LaunchSelLdr([in] PP_Instance instance,
                     [in] str_t alleged_url,
                     [in] int32_t socket_count,
                     [out] mem_t imc_handles);
 
   /* This function starts the PPAPI proxy so the nexe can communicate with the
@@ skipping 10 matching lines @@
    * proxy. This is so paranoid admins can effectively prevent untrusted shader
    * code to be processed by the graphics stack.
    */
   bool Are3DInterfacesDisabled();
 
   /* 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
    * could we make this happen on another thread?
    */
-  int32_t GetReadonlyPnaclFd([in] str_t filename);
+  PP_FileHandle GetReadonlyPnaclFd([in] str_t filename);
+
+  /* This creates a temporary file that will be deleted by the time
+   * the last handle is closed (or earlier on POSIX systems), and
+   * returns a posix handle to that temporary file.
+   */
+  PP_FileHandle CreateTemporaryFile([in] PP_Instance instance);
 };