Update window region after widget resizes not changing HWND size

ui/views/win/hwnd_message_handler.h

Index: ui/views/win/hwnd_message_handler.h
diff --git a/ui/views/win/hwnd_message_handler.h b/ui/views/win/hwnd_message_handler.h
index 24cd8fda66d53212e1cfbabe45a1a21ee0c17c0b..0e8aeb727136ded9122b3bbb0fdb0cf04d5d724d 100644
--- a/ui/views/win/hwnd_message_handler.h
+++ b/ui/views/win/hwnd_message_handler.h
@@ -130,7 +130,10 @@ class VIEWS_EXPORT HWNDMessageHandler :
   void GetWindowPlacement(gfx::Rect* bounds,
                           ui::WindowShowState* show_state) const;
 
-  void SetBounds(const gfx::Rect& bounds_in_pixels);
+  // Sets the bounds of the HWND to |bounds_in_pixels|. If the HWND size is not
+  // changed, |force_size_changed| determines if we should pretend it is.
+  void SetBounds(const gfx::Rect& bounds_in_pixels, bool force_size_changed);
+
   void SetSize(const gfx::Size& size);
   void CenterWindow(const gfx::Size& size);