* 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_win.cc
switch (last_window_state_) {
          case ui::SHOW_STATE_MAXIMIZED:
            last_window_state_ = ui::SHOW_STATE_NORMAL;
            NotifyWindowUnmaximize();
            if (!has_frame()) {
              TriggerNCCalcSize(GetAcceleratedWidget());
            }
            break;
          case ui::SHOW_STATE_MINIMIZED:
            if (IsFullscreen()) {
              last_window_state_ = ui::SHOW_STATE_FULLSCREEN;
              NotifyWindowEnterFullScreen();
            } else {
              last_window_state_ = ui::SHOW_STATE_NORMAL;
              
              
              if (has_frame()) {
                SetBounds(last_normal_bounds_, false);
              }
              NotifyWindowRestore();
            }
            break;
          default:
            break;
        }
      }
      break;
  }
}
void NativeWindowViews::SetForwardMouseMessages(bool forward) {