Set up a NaCl load status callback to start replacing "start_module".

components/nacl/renderer/ppb_nacl_private_impl.cc

Index: components/nacl/renderer/ppb_nacl_private_impl.cc
diff --git a/components/nacl/renderer/ppb_nacl_private_impl.cc b/components/nacl/renderer/ppb_nacl_private_impl.cc
index c879e48671bf9e1cb00fc42c3325ba6d162bf16f..018f8d871add9aa65403366a8022abb9820973c7 100644
--- a/components/nacl/renderer/ppb_nacl_private_impl.cc
+++ b/components/nacl/renderer/ppb_nacl_private_impl.cc
@@ -501,13 +501,12 @@ void LaunchSelLdr(PP_Instance instance,
 
   // Create the trusted plugin channel.
   if (IsValidChannelHandle(launch_result.trusted_ipc_channel_handle)) {
-    bool report_exit_status = PP_ToBool(main_service_runtime);
     scoped_ptr<TrustedPluginChannel> trusted_plugin_channel(
         new TrustedPluginChannel(
             load_manager,
             launch_result.trusted_ipc_channel_handle,
             content::RenderThread::Get()->GetShutdownEvent(),
-            report_exit_status));
+            PP_ToBool(main_service_runtime)));
     load_manager->set_trusted_plugin_channel(trusted_plugin_channel.Pass());
   } else {
     PostPPCompletionCallback(callback, PP_ERROR_FAILED);