win: Fix black pixel artifact at right and bottom

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 <stddef.h>
@@ skipping 383 matching lines @@
     CR_MSG_WM_NCCALCSIZE(OnNCCalcSize)
     CR_MSG_WM_NCHITTEST(OnNCHitTest)
     CR_MSG_WM_NCPAINT(OnNCPaint)
     CR_MSG_WM_NOTIFY(OnNotify)
     CR_MSG_WM_PAINT(OnPaint)
     CR_MSG_WM_SETFOCUS(OnSetFocus)
     CR_MSG_WM_SETICON(OnSetIcon)
     CR_MSG_WM_SETTEXT(OnSetText)
     CR_MSG_WM_SETTINGCHANGE(OnSettingChange)
     CR_MSG_WM_SIZE(OnSize)
+    CR_MSG_WM_SIZING(OnSizing)
     CR_MSG_WM_SYSCOMMAND(OnSysCommand)
     CR_MSG_WM_THEMECHANGED(OnThemeChanged)
     CR_MSG_WM_WINDOWPOSCHANGED(OnWindowPosChanged)
     CR_MSG_WM_WINDOWPOSCHANGING(OnWindowPosChanging)
   CR_END_MSG_MAP()
 
   // Message Handlers.
   // This list is in _ALPHABETICAL_ order!
   // TODO(beng): Once this object becomes the WindowImpl, these methods can
   //             be made private.
@@ skipping 35 matching lines @@
   LRESULT OnNotify(int w_param, NMHDR* l_param);
   void OnPaint(HDC dc);
   LRESULT OnReflectedMessage(UINT message, WPARAM w_param, LPARAM l_param);
   LRESULT OnScrollMessage(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 OnSettingChange(UINT flags, const wchar_t* section);
   void OnSize(UINT param, const gfx::Size& size);
+  void OnSizing(UINT edge, RECT* rect);
   void OnSysCommand(UINT notification_code, const gfx::Point& point);
   void OnThemeChanged();
   LRESULT OnTouchEvent(UINT message, WPARAM w_param, LPARAM l_param);
   void OnWindowPosChanging(WINDOWPOS* window_pos);
   void OnWindowPosChanged(WINDOWPOS* window_pos);
 
   // Receives Windows Session Change notifications.
   void OnSessionChange(WPARAM status_code);
 
   typedef std::vector<ui::TouchEvent> TouchEvents;
@@ skipping 206 matching lines @@
 
   // The factory used with BEGIN_SAFE_MSG_MAP_EX.
   base::WeakPtrFactory<HWNDMessageHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(HWNDMessageHandler);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIN_HWND_MESSAGE_HANDLER_H_