* Electron version: 1.4.15
* Operating system: Windows 10

### Actual behavior

Height is oversized by exactly 8px consistently (taskbar is set to small icons).

![Alt](https://raw.githubusercontent.com/adi518/electron-frameless-maximize-test/master/issue.jpg)

### How to reproduce

https://github.com/adi518/electron-frameless-maximize-test
atom/browser/native_window_views.cc
#if defined(OS_WIN)
  if (!(::GetWindowLong(GetAcceleratedWidget(), GWL_STYLE) & WS_THICKFRAME)) {
    SetBounds(restore_bounds_, false);
    return;
  }
#endif
  window_->Restore();
}
bool NativeWindowViews::IsMaximized() {
  return window_->IsMaximized();
}
void NativeWindowViews::Minimize() {
  if (IsVisible())
    window_->Minimize();
  else
    window_->native_widget_private()->ShowWithWindowState(
        ui::SHOW_STATE_MINIMIZED);
}
void NativeWindowViews::Restore() {
  window_->Restore();
}
bool NativeWindowViews::IsMinimized() {