Update window region after widget resizes not changing HWND size

ui/views/win/hwnd_message_handler.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_VIEWS_WIN_HWND_MESSAGE_HANDLER_H_
 #define UI_VIEWS_WIN_HWND_MESSAGE_HANDLER_H_
 
 #include <windows.h>
 
 #include <set>
@@ skipping 172 matching lines @@
   void SetCursor(HCURSOR cursor);
 
   void FrameTypeChanged();
 
   void SchedulePaintInRect(const gfx::Rect& rect);
   void SetOpacity(BYTE opacity);
 
   void SetWindowIcons(const gfx::ImageSkia& window_icon,
                       const gfx::ImageSkia& app_icon);
 
+  // Forces message handler to think a resize has happened. Useful when
+  // SetBounds() does not really change the size, but we want to force updates
+  // needed after a resize.
+  void ForceWindowResized();
+
   void set_remove_standard_frame(bool remove_standard_frame) {
     remove_standard_frame_ = remove_standard_frame;
   }
 
   void set_use_system_default_icon(bool use_system_default_icon) {
     use_system_default_icon_ = use_system_default_icon;
   }
 
  private:
   typedef std::set<DWORD> TouchIDs;
@@ skipping 398 matching lines @@
   // Time the last WM_MOUSEHWHEEL message is received. Please refer to the
   // HandleMouseEventInternal function as to why this is needed.
   long last_mouse_hwheel_time_;
 
   DISALLOW_COPY_AND_ASSIGN(HWNDMessageHandler);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIN_HWND_MESSAGE_HANDLER_H_