This adds some plumbing for propagating the reason for a renderer's death

chrome/browser/utility_process_host.cc

 // Copyright (c) 2009 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 "chrome/browser/utility_process_host.h"
 
 #include "app/app_switches.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/message_loop.h"
@@ skipping 141 matching lines @@
 
   return true;
 }
 
 void UtilityProcessHost::OnMessageReceived(const IPC::Message& message) {
   BrowserThread::PostTask(
       client_thread_id_, FROM_HERE,
       NewRunnableMethod(client_.get(), &Client::OnMessageReceived, message));
 }
 
-void UtilityProcessHost::OnProcessCrashed() {
+void UtilityProcessHost::OnProcessCrashed(int exit_code) {
   BrowserThread::PostTask(
       client_thread_id_, FROM_HERE,
-      NewRunnableMethod(client_.get(), &Client::OnProcessCrashed));
+      NewRunnableMethod(client_.get(), &Client::OnProcessCrashed, exit_code));
 }
 
 void UtilityProcessHost::Client::OnMessageReceived(
     const IPC::Message& message) {
   IPC_BEGIN_MESSAGE_MAP(UtilityProcessHost, message)
     IPC_MESSAGE_HANDLER(UtilityHostMsg_UnpackExtension_Succeeded,
                         Client::OnUnpackExtensionSucceeded)
     IPC_MESSAGE_HANDLER(UtilityHostMsg_UnpackExtension_Failed,
                         Client::OnUnpackExtensionFailed)
     IPC_MESSAGE_HANDLER(UtilityHostMsg_UnpackWebResource_Succeeded,
                         Client::OnUnpackWebResourceSucceeded)
     IPC_MESSAGE_HANDLER(UtilityHostMsg_UnpackWebResource_Failed,
                         Client::OnUnpackWebResourceFailed)
     IPC_MESSAGE_HANDLER(UtilityHostMsg_ParseUpdateManifest_Succeeded,
                         Client::OnParseUpdateManifestSucceeded)
     IPC_MESSAGE_HANDLER(UtilityHostMsg_ParseUpdateManifest_Failed,
                         Client::OnParseUpdateManifestFailed)
     IPC_MESSAGE_HANDLER(UtilityHostMsg_DecodeImage_Succeeded,
                         Client::OnDecodeImageSucceeded)
     IPC_MESSAGE_HANDLER(UtilityHostMsg_DecodeImage_Failed,
                         Client::OnDecodeImageFailed)
     IPC_MESSAGE_HANDLER(UtilityHostMsg_IDBKeysFromValuesAndKeyPath_Succeeded,
                         Client::OnIDBKeysFromValuesAndKeyPathSucceeded)
     IPC_MESSAGE_HANDLER(UtilityHostMsg_IDBKeysFromValuesAndKeyPath_Failed,
                         Client::OnIDBKeysFromValuesAndKeyPathFailed)
   IPC_END_MESSAGE_MAP_EX()
 }