* 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 GetSizeConstraints().GetMinimumSize();
}
void NativeWindow::SetMaximumSize(const gfx::Size& size) {
  extensions::SizeConstraints size_constraints;
  size_constraints.set_maximum_size(size);
  SetSizeConstraints(size_constraints);
}
gfx::Size NativeWindow::GetMaximumSize() const {
  return GetSizeConstraints().GetMaximumSize();
}
gfx::Size NativeWindow::GetContentMinimumSize() const {
  return GetContentSizeConstraints().GetMinimumSize();
}
gfx::Size NativeWindow::GetContentMaximumSize() const {
  gfx::Size maximum_size = GetContentSizeConstraints().GetMaximumSize();
#if defined(OS_WIN)
  return GetExpandedWindowSize(this, maximum_size);
#else
  return maximum_size;
#endif
}
void NativeWindow::SetSheetOffset(const double offsetX, const double offsetY) {
  sheet_offset_x_ = offsetX;
  sheet_offset_y_ = offsetY;
}
double NativeWindow::GetSheetOffsetX() {
  return sheet_offset_x_;
}
double NativeWindow::GetSheetOffsetY() {