Make original_response_headers parameter of NetworkDelegate::OnHeadersReceived const

content/shell/shell_network_delegate.cc

Index: content/shell/shell_network_delegate.cc
diff --git a/content/shell/shell_network_delegate.cc b/content/shell/shell_network_delegate.cc
index 69d0d8928795f2298cc641293a127df259d95a5f..bf23a20e2b25570b0a9ca02d47f3fe33165374f5 100644
--- a/content/shell/shell_network_delegate.cc
+++ b/content/shell/shell_network_delegate.cc
@@ -36,7 +36,7 @@ void ShellNetworkDelegate::OnSendHeaders(
 int ShellNetworkDelegate::OnHeadersReceived(
     net::URLRequest* request,
     const net::CompletionCallback& callback,
-    net::HttpResponseHeaders* original_response_headers,
+    const net::HttpResponseHeaders* original_response_headers,
     scoped_refptr<net::HttpResponseHeaders>* override_response_headers) {
   return net::OK;
 }