These events are emitted for every navigation request which isn't really efficient. Also upstream has removed the observers that provide these details as part of network servification https://chromium-review.googlesource.com/c/chromium/src/+/805008 and https://chromium-review.googlesource.com/c/chromium/src/+/786320. We are removing it as a part of chromium 66 upgrade.

Proposed alternative: Users can use the [webRequest](https://github.com/electron/electron/blob/master/docs/api/web-request.md) module which provides similar navigation details on a subscription basis.
atom/browser/api/atom_api_web_contents.cc
if (!IsOffScreen())
    return false;
#if defined(ENABLE_OSR)
  auto* osr_wcv = GetOffScreenWebContentsView();
  return osr_wcv && osr_wcv->IsPainting();
#else
  return false;
#endif
}
void WebContents::SetFrameRate(int frame_rate) {
  if (!IsOffScreen())
    return;
#if defined(ENABLE_OSR)
  auto* osr_wcv = GetOffScreenWebContentsView();
  if (osr_wcv)
    osr_wcv->SetFrameRate(frame_rate);
#endif
}
int WebContents::GetFrameRate() const {
  if (!IsOffScreen())
    return 0;
#if defined(ENABLE_OSR)
  auto* osr_wcv = GetOffScreenWebContentsView();
  return osr_wcv ? osr_wcv->GetFrameRate() : 0;
#else
  return 0;
#endif
}
void WebContents::Invalidate() {