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/api/atom_api_window.cc
window_->FlashFrame(flash);
}
void Window::SetSkipTaskbar(bool skip) {
  window_->SetSkipTaskbar(skip);
}
void Window::SetKiosk(bool kiosk) {
  window_->SetKiosk(kiosk);
}
bool Window::IsKiosk() {
  return window_->IsKiosk();
}
void Window::SetBackgroundColor(const std::string& color_name) {
  window_->SetBackgroundColor(color_name);
}
void Window::SetHasShadow(bool has_shadow) {
  window_->SetHasShadow(has_shadow);
}
bool Window::HasShadow() {
  return window_->HasShadow();
}
void Window::FocusOnWebView() {
  window_->FocusOnWebView();
}
void Window::BlurWebView() {
  window_->BlurWebView();
}
bool Window::IsWebViewFocused() {
  return window_->IsWebViewFocused();
}
void Window::SetRepresentedFilename(const std::string& filename) {