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

chrome/browser/extensions/extension_host.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_HOST_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_HOST_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 96 matching lines @@
   // Tell the renderer not to draw scrollbars on windows smaller than
   // |size_limit| in both width and height.
   void DisableScrollbarsForSmallWindows(const gfx::Size& size_limit);
 
   // RenderViewHostDelegate::View implementation.
   virtual const GURL& GetURL() const { return url_; }
   virtual void RenderViewCreated(RenderViewHost* render_view_host);
   virtual ViewType::Type GetRenderViewType() const;
   virtual FileSelect* GetFileSelectDelegate();
   virtual int GetBrowserWindowID() const;
-  virtual void RenderViewGone(RenderViewHost* render_view_host);
+  virtual void RenderViewGone(RenderViewHost* render_view_host,
+                              base::TerminationStatus status,
+                              int error_code);
   virtual void DidNavigate(RenderViewHost* render_view_host,
                            const ViewHostMsg_FrameNavigate_Params& params);
   virtual void DidStopLoading();
   virtual void DocumentAvailableInMainFrame(RenderViewHost* render_view_host);
   virtual void DocumentOnLoadCompletedInMainFrame(
       RenderViewHost* render_view_host,
       int32 page_id);
 
   // RenderViewHostDelegate implementation.
   virtual RenderViewHostDelegate::View* GetViewDelegate();
@@ skipping 149 matching lines @@
   // Used to measure how long it's been since the host was created.
   PerfTimer since_created_;
 
   // FileSelectHelper, lazily created.
   scoped_ptr<FileSelectHelper> file_select_helper_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionHost);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_HOST_H_