Move more message handlers from NativeWidgetWin to HWNDMessageHandler.

ui/views/widget/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_WIDGET_HWND_MESSAGE_HANDLER_H_
 #define UI_VIEWS_WIDGET_HWND_MESSAGE_HANDLER_H_
 
 #include <atlbase.h>
 #include <atlapp.h>
 #include <atlmisc.h>
@@ skipping 47 matching lines @@
   void OnMoving(UINT param, const RECT* new_bounds);
   LRESULT OnNCHitTest(const CPoint& point);
   LRESULT OnNCUAHDrawCaption(UINT message, WPARAM w_param, LPARAM l_param);
   LRESULT OnNCUAHDrawFrame(UINT message, WPARAM w_param, LPARAM l_param);
   LRESULT OnPowerBroadcast(DWORD power_event, DWORD data);
   LRESULT OnReflectedMessage(UINT message, WPARAM w_param, LPARAM l_param);
   LRESULT OnSetCursor(UINT message, WPARAM w_param, LPARAM l_param);
   void OnSetFocus(HWND last_focused_window);
   LRESULT OnSetIcon(UINT size_type, HICON new_icon);
   LRESULT OnSetText(const wchar_t* text);
+  void OnSize(UINT param, const CSize& size);
   void OnThemeChanged();
   void OnVScroll(int scroll_type, short position, HWND scrollbar);
 
   // TODO(beng): Can be removed once this object becomes the WindowImpl.
   bool remove_standard_frame() const { return remove_standard_frame_; }
   void set_remove_standard_frame(bool remove_standard_frame) {
     remove_standard_frame_ = remove_standard_frame;
   }
 
+  // Resets the window region for the current widget bounds if necessary.
+  // If |force| is true, the window region is reset to NULL even for native
+  // frame windows.
+  void ResetWindowRegion(bool force);
+
  private:
   // TODO(beng): This won't be a style violation once this object becomes the
   //             WindowImpl.
   HWND hwnd();
 
   // TODO(beng): Remove once this class becomes the WindowImpl.
   LRESULT DefWindowProcWithRedrawLock(UINT message,
                                       WPARAM w_param,
                                       LPARAM l_param);
 
   // TODO(beng): Remove once this class becomes the WindowImpl.
   void SetMsgHandled(BOOL handled);
 
   HWNDMessageHandlerDelegate* delegate_;
 
   bool remove_standard_frame_;
 
   DISALLOW_COPY_AND_ASSIGN(HWNDMessageHandler);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_HWND_MESSAGE_HANDLER_H_