When launching PNaCl helper nexes, explicitly disable IRT loading.

ppapi/native_client/src/trusted/plugin/plugin.h

 // -*- c++ -*-
 // 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.
 
 // The portable representation of an instance and root scriptable object.
 // The PPAPI version of the plugin instantiates a subclass of this class.
 
 #ifndef NATIVE_CLIENT_SRC_TRUSTED_PLUGIN_PLUGIN_H_
 #define NATIVE_CLIENT_SRC_TRUSTED_PLUGIN_PLUGIN_H_
@@ skipping 332 matching lines @@
   ServiceRuntime* main_service_runtime() const {
     return main_subprocess_.service_runtime();
   }
 
   // Help load a nacl module, from the file specified in wrapper.
   // This will fully initialize the |subprocess| if the load was successful.
   bool LoadNaClModuleCommon(nacl::DescWrapper* wrapper,
                             NaClSubprocess* subprocess,
                             const Manifest* manifest,
                             bool should_report_uma,
+                            bool uses_irt,
                             bool uses_ppapi,
                             ErrorInfo* error_info,
                             pp::CompletionCallback init_done_cb,
                             pp::CompletionCallback crash_cb);
 
   // Callback used when getting the URL for the .nexe file.  If the URL loading
   // is successful, the file descriptor is opened and can be passed to sel_ldr
   // with the sandbox on.
   void NexeFileDidOpen(int32_t pp_error);
   void NexeFileDidOpenContinuation(int32_t pp_error);
@@ skipping 164 matching lines @@
   const FileDownloader* FindFileDownloader(PP_Resource url_loader) const;
 
   int64_t time_of_last_progress_event_;
 
   const PPB_NaCl_Private* nacl_interface_;
 };
 
 }  // namespace plugin
 
 #endif  // NATIVE_CLIENT_SRC_TRUSTED_PLUGIN_PLUGIN_H_