* Electron Version: 2.0.0
* Operating System (Platform and Version): Windows 10
* Last known working Electron version: before commit bb5eecc16cff8053c7b04e0b9396803fbbb8c4df

**Expected Behavior**
Width and height of a window should not change while being dragged 

**Actual behavior**
Width and height become smaller.

**To Reproduce**
Create a window with:
  var mainWindow = new BrowserWindow({width: 1024, height: 880, x: 30, y: 30,
            resizable: false })

Then drag the window.  Width and height become smaller than specified (1024, 880)

**Additional Information**
NativeWindowViews::SetBounds calls SetMin/MaxSize(bounds) when resizable_ is false.  bounds get adjusted to smaller  numbers by WindowBoundsToContentBounds.

shell/browser/native_window_views.cc
if (IsMaximized())
    return ui::SHOW_STATE_MAXIMIZED;
  if (IsFullscreen())
    return ui::SHOW_STATE_FULLSCREEN;
  return ui::SHOW_STATE_NORMAL;
}
void NativeWindowViews::MoveBehindTaskBarIfNeeded() {
#if defined(OS_WIN)
  if (behind_task_bar_) {
    const HWND task_bar_hwnd = ::FindWindow(kUniqueTaskBarClassName, nullptr);
    ::SetWindowPos(GetAcceleratedWidget(), task_bar_hwnd, 0, 0, 0, 0,
                   SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);
  }
#endif
  
}
NativeWindow* NativeWindow::Create(const mate::Dictionary& options,
                                   NativeWindow* parent) {
  return new NativeWindowViews(options, parent);
}
}