- Electron version: 1.4.3
- Operating system: MacOS 10.11.6

When setCertificateVerifyProc is used, Electron will crash as soon as the callback method is called. Crash log is attached and I've created a very simple project to demonstrate how this can be reproduced: https://github.com/gregnolle/electron-cert-verify-demo

[Electron_2016-10-15-120129_Gregs-iMac.crash.txt](https://github.com/electron/electron/files/531093/Electron_2016-10-15-120129_Gregs-iMac.crash.txt)

atom/browser/atom_browser_context.cc
}
void AtomBrowserContext::SetUserAgent(const std::string& user_agent) {
  user_agent_ = user_agent;
}
net::NetworkDelegate* AtomBrowserContext::CreateNetworkDelegate() {
  return network_delegate_;
}
net::CookieMonsterDelegate* AtomBrowserContext::CreateCookieDelegate() {