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

chrome/common/render_messages_internal.h

Index: chrome/common/render_messages_internal.h
diff --git a/chrome/common/render_messages_internal.h b/chrome/common/render_messages_internal.h
index adf6cde7dbeb0babfaf06670b3eec50dc35968dd..e232d49c8aca90c57035e1d4100e10458bcb636e 100644
--- a/chrome/common/render_messages_internal.h
+++ b/chrome/common/render_messages_internal.h
@@ -1200,7 +1200,9 @@ IPC_BEGIN_MESSAGES(ViewHost)
 
   // Indicates the renderer process is gone.  This actually is sent by the
   // browser process to itself, but keeps the interface cleaner.
-  IPC_MESSAGE_ROUTED0(ViewHostMsg_RenderViewGone)
+  IPC_MESSAGE_ROUTED2(ViewHostMsg_RenderViewGone,
+                      int, /* this really is base::TerminationStatus */
+                      int /* exit_code */)
 
   // Sent by the renderer process to request that the browser close the view.
   // This corresponds to the window.close() API, and the browser may ignore