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

chrome/browser/extensions/sandboxed_extension_unpacker.cc

 // Copyright (c) 2010 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/extensions/sandboxed_extension_unpacker.h"
 
 #include <set>
 
 #include "base/base64.h"
 #include "base/crypto/signature_verifier.h"
@@ skipping 163 matching lines @@
   ReportSuccess();
 }
 
 void SandboxedExtensionUnpacker::OnUnpackExtensionFailed(
     const std::string& error) {
   DCHECK(BrowserThread::CurrentlyOn(thread_identifier_));
   got_response_ = true;
   ReportFailure(error);
 }
 
-void SandboxedExtensionUnpacker::OnProcessCrashed() {
+void SandboxedExtensionUnpacker::OnProcessCrashed(int exit_code) {
   // Don't report crashes if they happen after we got a response.
   if (got_response_)
     return;
 
   ReportFailure("Utility process crashed while trying to install.");
 }
 
 bool SandboxedExtensionUnpacker::ValidateSignature() {
   ScopedStdioHandle file(file_util::OpenFile(crx_path_, "rb"));
   if (!file.get()) {
@@ skipping 220 matching lines @@
     if (!file_util::WriteFile(path,
                               catalog_json.c_str(),
                               catalog_json.size())) {
       ReportFailure("Error saving catalog.");
       return false;
     }
   }
 
   return true;
 }