Pepper: Simplify LaunchSelLdr error reporting.

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. */
 
 label Chrome {
   M25 = 1.0
@@ skipping 170 matching lines @@
    * be used with the binary pointed by the url.
    * The |enable_dyncode_syscalls| flag indicates whether or not the nexe
    * will be able to use dynamic code system calls (e.g., mmap with PROT_EXEC).
    * The |enable_exception_handling| flag indicates whether or not the nexe
    * will be able to use hardware exception handling.
    * The |enable_crash_throttling| flag indicates whether or not crashes of
    * the nexe contribute to crash throttling statisics and whether nexe starts
    * are throttled by crash throttling.
    */
   void LaunchSelLdr([in] PP_Instance instance,
+                    [in] PP_Bool main_service_runtime,
                     [in] str_t alleged_url,
                     [in] PP_Bool uses_irt,
                     [in] PP_Bool uses_ppapi,
                     [in] PP_Bool uses_nonsfi_mode,
                     [in] PP_Bool enable_ppapi_dev,
                     [in] PP_Bool enable_dyncode_syscalls,
                     [in] PP_Bool enable_exception_handling,
                     [in] PP_Bool enable_crash_throttling,
                     [in] PPP_ManifestService manifest_service_interface,
                     [inout] mem_t manifest_service_user_data,
                     [out] mem_t imc_handle,
-                    [out] PP_Var error_message,
                     [in] PP_CompletionCallback callback);
 
   /* This function starts the IPC proxy so the nexe can communicate with the
    * browser.
    */
   PP_Bool StartPpapiProxy(PP_Instance instance);
 
   /* On POSIX systems, this function returns the file descriptor of
    * /dev/urandom.  On non-POSIX systems, this function returns 0.
    */
@@ skipping 230 matching lines @@
   // of attributes supported by LLVM in its -mattr= option:
   //   http://llvm.org/docs/CommandGuide/llc.html#cmdoption-mattr
   PP_Var GetCpuFeatureAttrs();
 
   /* Posts a message to the JavaScript object for the given instance.
    * This method may be called on any thread.
    */
   void PostMessageToJavaScript([in] PP_Instance instance,
                                [in] str_t message);
 };