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

chrome/browser/extensions/sandboxed_extension_unpacker.cc

Index: chrome/browser/extensions/sandboxed_extension_unpacker.cc
diff --git a/chrome/browser/extensions/sandboxed_extension_unpacker.cc b/chrome/browser/extensions/sandboxed_extension_unpacker.cc
index faf236b1fe09b67b0a135d74118193ff096190e3..fc01884bce29c0e2181d12da8e5174029ffcca69 100644
--- a/chrome/browser/extensions/sandboxed_extension_unpacker.cc
+++ b/chrome/browser/extensions/sandboxed_extension_unpacker.cc
@@ -181,7 +181,7 @@ void SandboxedExtensionUnpacker::OnUnpackExtensionFailed(
   ReportFailure(error);
 }
 
-void SandboxedExtensionUnpacker::OnProcessCrashed() {
+void SandboxedExtensionUnpacker::OnProcessCrashed(int exit_code) {
   // Don't report crashes if they happen after we got a response.
   if (got_response_)
     return;