* 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
if (prevent_default) {
        ::GetWindowRect(GetAcceleratedWidget(),
                        reinterpret_cast<RECT*>(l_param));
        return true;  
      }
      return false;
    }
    case WM_SIZE: {
      
      HandleSizeEvent(w_param, l_param);
      consecutive_moves_ = false;
      last_normal_bounds_before_move_ = last_normal_bounds_;
      return false;
    }
    case WM_MOVING: {
      bool prevent_default = false;
      NotifyWindowWillMove(gfx::Rect(*reinterpret_cast<RECT*>(l_param)),
                           &prevent_default);
      if (!movable_ || prevent_default) {
        ::GetWindowRect(GetAcceleratedWidget(),
                        reinterpret_cast<RECT*>(l_param));
        return true;  
                      
                      
      }
      return false;
    }
    case WM_MOVE: {
      if (last_window_state_ == ui::SHOW_STATE_NORMAL) {
        if (consecutive_moves_)