NaCl: enable meta-based validation for shared libraries.

ppapi/api/private/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. This interface is not versioned
  * and is for internal Chrome use. It may change without notice. */
 
 #inline c
 #include "ppapi/c/private/pp_file_handle.h"
@@ skipping 16 matching lines @@
 
 /** NaCl-specific errors that should be reported to the user */
 enum PP_NaClError {
   /**
    *  The manifest program element does not contain a program usable on the
    *  user's architecture
   */
   PP_NACL_MANIFEST_MISSING_ARCH = 0
 };
 
-struct PP_NaClExecutableMetadata {
-  /** File path of NaCl executable. This is created by the OpenNaClExecutableFd
-   *  function. It is the caller's responsiblity to release it. */
-  PP_Var file_path;
-};
-
 /* PPB_NaCl_Private */
 interface PPB_NaCl_Private {
   /* Launches NaCl's sel_ldr process.  Returns PP_NACL_OK on success and
    * writes a NaClHandle to imc_handle. Returns PP_NACL_FAILED on failure.
    * The |enable_ppapi_dev| parameter controls whether GetInterface
    * returns 'Dev' interfaces to the NaCl plugin.  The |uses_ppapi| flag
    * indicates that the nexe run by sel_ldr will use the PPAPI APIs.
    * This implies that LaunchSelLdr is run from the main thread.  If a nexe
    * does not need PPAPI, then it can run off the main thread.
    * The |uses_irt| flag indicates whether the IRT should be loaded in this
@@ skipping 69 matching lines @@
   /* Display a UI message to the user. */
   PP_NaClResult ReportNaClError([in] PP_Instance instance,
                                 [in] PP_NaClError message_id);
 
   /* Opens a NaCl executable file in the application's extension directory
    * corresponding to the file URL and returns a file descriptor, or an invalid
    * handle on failure. |metadata| is left unchanged on failure.
    */
   PP_FileHandle OpenNaClExecutable([in] PP_Instance instance,
                                    [in] str_t file_url,
-                                   [out] PP_NaClExecutableMetadata metadata);
+                                   [out] uint64_t nonce);
 };