* 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.h
bool ShouldBeEnabled();
  void SetEnabledInternal(bool enabled);
  
  void HandleKeyboardEvent(
      content::WebContents*,
      const content::NativeWebKeyboardEvent& event) override;
#if defined(OS_LINUX)
  
  void OnMouseEvent(ui::MouseEvent* event) override;
#endif
  
  ui::WindowShowState GetRestoredState();
  
  void MoveBehindTaskBarIfNeeded();
  std::unique_ptr<RootView> root_view_;
  
  views::View* focused_view_ = nullptr;
  
  
  
  
  extensions::SizeConstraints old_size_constraints_;
#if defined(USE_X11)
  std::unique_ptr<GlobalMenuBarX11> global_menu_bar_;
  
  std::unique_ptr<WindowStateWatcher> window_state_watcher_;
  
  std::unique_ptr<EventDisabler> event_disabler_;
#endif
#if defined(OS_WIN)