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

components/nacl/loader/nacl_listener.cc

 // Copyright 2013 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.
 
 #include "components/nacl/loader/nacl_listener.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <stdlib.h>
 #include <string.h>
@@ skipping 51 matching lines @@
 
   // We copy the length of the crash data to the start of the shared memory
   // segment so we know how much to copy.
   memcpy(g_listener->crash_info_shmem_memory(), &copy_bytes, sizeof(uint32_t));
 
   memcpy((char*)g_listener->crash_info_shmem_memory() + sizeof(uint32_t),
          data,
          copy_bytes);
 }
 
+void LoadStatusCallback(int load_status) {
+  g_listener->trusted_listener()->Send(
+      new NaClRendererMsg_ReportLoadStatus(
+          static_cast<NaClErrorCode>(load_status)));
+}
+
 #if defined(OS_MACOSX)
 
 // On Mac OS X, shm_open() works in the sandbox but does not give us
 // an FD that we can map as PROT_EXEC.  Rather than doing an IPC to
 // get an executable SHM region when CreateMemoryObject() is called,
 // we preallocate one on startup, since NaCl's sel_ldr only needs one
 // of them.  This saves a round trip.
 
 base::subtle::Atomic32 g_shm_fd = -1;
 
@@ skipping 331 matching lines @@
 #if defined(OS_LINUX) || defined(OS_MACOSX)
   args->debug_stub_server_bound_socket_fd = nacl::ToNativeHandle(
       params.debug_stub_server_bound_socket);
 #endif
 #if defined(OS_WIN)
   args->broker_duplicate_handle_func = BrokerDuplicateHandle;
   args->attach_debug_exception_handler_func = AttachDebugExceptionHandler;
   args->debug_stub_server_port_selected_handler_func =
       DebugStubPortSelectedHandler;
 #endif
+  args->load_status_handler_func = LoadStatusCallback;
 #if defined(OS_LINUX)
   args->prereserved_sandbox_size = prereserved_sandbox_size_;
 #endif
 
   base::PlatformFile nexe_file = IPC::PlatformFileForTransitToPlatformFile(
       params.nexe_file);
   std::string file_path_str = params.nexe_file_path_metadata.AsUTF8Unsafe();
   args->nexe_desc = NaClDescCreateWithFilePathMetadata(nexe_file,
                                                        file_path_str.c_str());
 
@@ skipping 31 matching lines @@
 }
 
 void NaClListener::OnFileTokenResolved(
     uint64_t token_lo,
     uint64_t token_hi,
     IPC::PlatformFileForTransit ipc_fd,
     base::FilePath file_path) {
   resolved_cb_.Run(ipc_fd, file_path);
   resolved_cb_.Reset();
 }