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### Issue Details

* **Electron Version:**
  * 8.0.0-beta.5
* **Operating System:**
  * Windows 10
* **Last Known Working Electron version:**
  * 8.0.0-beta,4

### Expected Behavior
http://google.com should load without any crash

### Actual Behavior
Going to http://google.com works for the first time. However, when going to the same URL after the cache has been saved in `userData`, it crashes with `3221225477` exit code. The strange thing is that when going to https://google.com, it works perfectly.

### To Reproduce
(I couldn't use Fiddle, since it saves the `userData` temporarily)
https://github.com/sentialx/electron-quick-start/tree/google-crash
Branch `google-crash`

shell/browser/atom_browser_client.cc
content::RenderFrameHost* rfh,
    content::SiteInstance* pending_site_instance) {
  
  ConsiderSiteInstanceForAffinity(rfh, pending_site_instance);
  
  auto* web_contents = content::WebContents::FromRenderFrameHost(rfh);
  auto* pending_process = pending_site_instance->GetProcess();
  pending_processes_[pending_process->GetID()] = web_contents;
  if (rfh->GetParent())
    renderer_is_subframe_.insert(pending_process->GetID());
  else
    renderer_is_subframe_.erase(pending_process->GetID());
}
void AtomBrowserClient::AppendExtraCommandLineSwitches(
    base::CommandLine* command_line,
    int process_id) {
  
  {
    base::ThreadRestrictions::ScopedAllowIO allow_io;
    base::FilePath child_path;
    base::FilePath program =
        base::MakeAbsoluteFilePath(command_line->GetProgram());
#if defined(OS_MACOSX)
    auto renderer_child_path = content::ChildProcessHost::GetChildPath(
        content::ChildProcessHost::CHILD_RENDERER);
    auto gpu_child_path = content::ChildProcessHost::GetChildPath(
        content::ChildProcessHost::CHILD_GPU);
    auto plugin_child_path = content::ChildProcessHost::GetChildPath(
        content::ChildProcessHost::CHILD_PLUGIN);
    if (program != renderer_child_path && program != gpu_child_path &&