- Electron version: 1.2.1
- Operating system: Mac OS X

See also https://github.com/electron/electron/issues/5714

STR:
1. Start a webserver on localhost:port that serves a dummy index.html
2. Register a custom http protocol.
   
   ``` js
   electron.protocol.registerStandardSchemes(['foobar', 'http', 'https']);
   
   app.on('ready', function() {
     electron.protocol.registerHttpProtocol('foobar', (request, callback) => {
       const redirectPath = `http://localhost:port/index.html`;
       callback({ method: request.method, referrer: request.referrer, url: redirectPath });
     }, e => { if (e) { console.log(e); } });
   });
   ```
3. Either through devtools, or via some js in our index.html, have a single line that does `fetch('http://localhost:port/index.html')` or anything else from our server.

Results: as soon as `fetch` is called, the webview becomes black, and the devtools crash if they were open. No other visible error or stdout.

If devtools were open, they show this message: "Devtools was disconnected from the page.
Once page is reloaded, DevTools will automatically reconnect."

atom/renderer/atom_renderer_client.cc
}
void AtomRendererClient::RenderThreadStarted() {
  blink::WebCustomElement::addEmbedderCustomElementName("webview");
  blink::WebCustomElement::addEmbedderCustomElementName("browserplugin");
  OverrideNodeArrayBuffer();
  preferences_manager_.reset(new PreferencesManager);
#if defined(OS_WIN)
  
  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
  base::string16 app_id =
      command_line->GetSwitchValueNative(switches::kAppUserModelId);
  if (!app_id.empty()) {
    SetCurrentProcessExplicitAppUserModelID(app_id.c_str());
  }
#endif
#if defined(OS_MACOSX)
  
  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
  if (!command_line->HasSwitch(switches::kScrollBounce)) {
    base::ScopedCFTypeRef<CFStringRef> key(
        base::SysUTF8ToCFStringRef("NSScrollViewRubberbanding"));
    base::ScopedCFTypeRef<CFStringRef> value(
        base::SysUTF8ToCFStringRef("false"));
    CFPreferencesSetAppValue(key, value, kCFPreferencesCurrentApplication);
    CFPreferencesAppSynchronize(kCFPreferencesCurrentApplication);
  }
#endif
}
void AtomRendererClient::RenderFrameCreated(