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

chrome/browser/extensions/extension_host.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/extension_host.h"
 
 #include <list>
 
 #include "app/keyboard_codes.h"
 #include "app/l10n_util.h"
@@ skipping 266 matching lines @@
 
 void ExtensionHost::UpdateInspectorSetting(const std::string& key,
                                          const std::string& value) {
   RenderViewHostDelegateHelper::UpdateInspectorSetting(profile(), key, value);
 }
 
 void ExtensionHost::ClearInspectorSettings() {
   RenderViewHostDelegateHelper::ClearInspectorSettings(profile());
 }
 
-void ExtensionHost::RenderViewGone(RenderViewHost* render_view_host) {
+void ExtensionHost::RenderViewGone(RenderViewHost* render_view_host,
+                                   base::TerminationStatus status,
+                                   int error_code) {
   // During browser shutdown, we may use sudden termination on an extension
   // process, so it is expected to lose our connection to the render view.
   // Do nothing.
   if (browser_shutdown::GetShutdownType() != browser_shutdown::NOT_VALID)
     return;
 
   // In certain cases, multiple ExtensionHost objects may have pointed to
   // the same Extension at some point (one with a background page and a
   // popup, for example). When the first ExtensionHost goes away, the extension
   // is unloaded, and any other host that pointed to that extension will have
@@ skipping 470 matching lines @@
     // Extensions hosted in ExternalTabContainer objects may not have
     // an associated browser.
     Browser* browser = GetBrowser();
     if (browser)
       window_id = ExtensionTabUtil::GetWindowId(browser);
   } else if (extension_host_type_ != ViewType::EXTENSION_BACKGROUND_PAGE) {
     NOTREACHED();
   }
   return window_id;
 }