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

chrome/browser/utility_process_host.h

Index: chrome/browser/utility_process_host.h
diff --git a/chrome/browser/utility_process_host.h b/chrome/browser/utility_process_host.h
index 48d5e389e7b177d660ec331dc7566df5470cc1f7..da2a05a8c3ed3d9e2380f8f297f7997fa9c2d573 100644
--- a/chrome/browser/utility_process_host.h
+++ b/chrome/browser/utility_process_host.h
@@ -39,7 +39,7 @@ class UtilityProcessHost : public BrowserChildProcessHost {
     Client() {}
 
     // Called when the process has crashed.
-    virtual void OnProcessCrashed() {}
+    virtual void OnProcessCrashed(int exit_code) {}
 
     // Called when the extension has unpacked successfully.  |manifest| is the
     // parsed manifest.json file.  |catalogs| contains list of all parsed
@@ -153,7 +153,7 @@ class UtilityProcessHost : public BrowserChildProcessHost {
   void OnMessageReceived(const IPC::Message& message);
 
   // BrowserChildProcessHost:
-  virtual void OnProcessCrashed();
+  virtual void OnProcessCrashed(int exit_code);
   virtual bool CanShutdown() { return true; }
   virtual URLRequestContext* GetRequestContext(
       uint32 request_id,