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

chrome/browser/extensions/extension_crash_recovery_browsertest.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 "base/process_util.h"
 #include "chrome/browser/extensions/crashed_extension_infobar.h"
 #include "chrome/browser/extensions/extension_browsertest.h"
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/browser/extensions/extension_process_manager.h"
 #include "chrome/browser/extensions/extensions_service.h"
@@ skipping 44 matching lines @@
         GetExtensionsService()->extensions()->at(index);
     ASSERT_TRUE(extension);
     std::string extension_id(extension->id());
     ExtensionHost* extension_host =
         GetExtensionProcessManager()->GetBackgroundHostForExtension(extension);
     ASSERT_TRUE(extension_host);
 
     RenderProcessHost* extension_rph =
         extension_host->render_view_host()->process();
     base::KillProcess(extension_rph->GetHandle(),
-                      base::PROCESS_END_KILLED_BY_USER, false);
+                      base::EXIT_CODE_PROCESS_WAS_KILLED, false);
     ASSERT_TRUE(WaitForExtensionCrash(extension_id));
     ASSERT_FALSE(
         GetExtensionProcessManager()->GetBackgroundHostForExtension(extension));
   }
 
   void CheckExtensionConsistency(size_t index) {
     ASSERT_LT(index, GetExtensionsService()->extensions()->size());
     const Extension* extension =
         GetExtensionsService()->extensions()->at(index);
     ASSERT_TRUE(extension);
@@ skipping 211 matching lines @@
     CheckExtensionConsistency(size_before);
   }
 
   {
     SCOPED_TRACE("second: infobar");
     AcceptCrashedExtensionInfobar(0);
     CheckExtensionConsistency(size_before);
     CheckExtensionConsistency(size_before + 1);
   }
 }