* Electron Version: v2.0.1
* Operating System (Platform and Version): windows10
* Last known working Electron version: 1.7.9

Allow frameless transparent windows to be sized smaller than 64x64 on Windows #12923

but，now, it can't bigger than 64x64 on Windows
my `height/width` don't work
when i set `frame: true`, it can't resize
remove `transparent: true`, all work right
![2018-05-18 11_14_17](https://user-images.githubusercontent.com/12164900/40214332-aac2815e-5a8c-11e8-8aa1-38ec2a427e0a.gif)

atom/browser/native_window.cc
return GetBounds().origin();
}
void NativeWindow::SetContentSize(const gfx::Size& size, bool animate) {
  SetSize(ContentBoundsToWindowBounds(gfx::Rect(size)).size(), animate);
}
gfx::Size NativeWindow::GetContentSize() {
  return GetContentBounds().size();
}
void NativeWindow::SetContentBounds(const gfx::Rect& bounds, bool animate) {
  SetBounds(ContentBoundsToWindowBounds(bounds), animate);
}
gfx::Rect NativeWindow::GetContentBounds() {
  return WindowBoundsToContentBounds(GetBounds());
}
void NativeWindow::SetSizeConstraints(
    const extensions::SizeConstraints& window_constraints) {
  extensions::SizeConstraints content_constraints(GetContentSizeConstraints());
  if (window_constraints.HasMaximumSize()) {
    gfx::Rect max_bounds = WindowBoundsToContentBounds(
        gfx::Rect(window_constraints.GetMaximumSize()));
    content_constraints.set_maximum_size(max_bounds.size());
  }
  if (window_constraints.HasMinimumSize()) {
    gfx::Rect min_bounds = WindowBoundsToContentBounds(
        gfx::Rect(window_constraints.GetMinimumSize()));
    content_constraints.set_minimum_size(min_bounds.size());
  }
  SetContentSizeConstraints(content_constraints);
}
extensions::SizeConstraints NativeWindow::GetSizeConstraints() const {