We can get the content size and the window size, but not the chrome position.

At the moment we do this:

```
leftBorderWidth = (windowWidth - contentWidth) / 2;
titlebarHeight = windowHeight - (contentHeight + leftBorderWidth);
```

which makes some assumptions so therefore feels a bit wrong.

it would be nice if alongside getContentSize (https://github.com/electron/electron/blob/master/docs/api/browser-window.md#wingetcontentsize) there was a getContentOffset.

I've been looking at the C++ - https://github.com/electron/electron/blob/e05804848f98959d63337aacd9047cd579c5b23f/chromium_src/extensions/browser/app_window/size_constraints.cc and I don't see an easy way to get this information - do you have any ideas or pointers if you accept this as a feature request?

atom/browser/native_window_views.cc
return menu_bar_visible_;
}
void NativeWindowViews::SetVisibleOnAllWorkspaces(bool visible) {
  window_->SetVisibleOnAllWorkspaces(visible);
}
bool NativeWindowViews::IsVisibleOnAllWorkspaces() {
#if defined(USE_X11)
  
  
  XAtom sticky_atom = GetAtom("_NET_WM_STATE_STICKY");
  std::vector<XAtom> wm_states;
  ui::GetAtomArrayProperty(GetAcceleratedWidget(), "_NET_WM_STATE", &wm_states);
  return std::find(wm_states.begin(),
                   wm_states.end(), sticky_atom) != wm_states.end();
#endif
  return false;
}
gfx::AcceleratedWidget NativeWindowViews::GetAcceleratedWidget() {