Set cloned_session_storage_namespace_id on error in RenderMessageFilter::OnCreateWindow().

This prevents a MSAN warning.

BUG=390973
R=piman@chromium.org

Review URL: https://codereview.chromium.org/362353004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@282203 0039d316-1c4b-4281-b951-d872f2087c98

content/browser/renderer_host/render_message_filter.cc

@@ -507,6 +507,7 @@ void RenderMessageFilter::OnCreateWindow(
     *route_id = MSG_ROUTING_NONE;
     *main_frame_route_id = MSG_ROUTING_NONE;
     *surface_id = 0;
+    *cloned_session_storage_namespace_id = 0;
     return;
   }