Fix remaining -Wdelete-non-virtual-dtor violations on Windows.

core/src/fxge/win32/fx_win32_device.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
  
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "../../../include/fxge/fx_ge.h"
 #if _FX_OS_ == _FX_WIN32_DESKTOP_ || _FX_OS_ == _FX_WIN64_
 #include "../../../include/fxge/fx_ge_win32.h"
 #include <crtdbg.h>
 #include "../agg/include/fxfx_agg_clip_liang_barsky.h"
 #include "dwrite_int.h"
 #include "win32_int.h"
 #include "../ge/text_int.h"
 #include "../dib/dib_int.h"
 #include "../agg/include/fx_agg_driver.h"
 #include "../../../include/fxge/fx_freetype.h"
 #include "../../../include/fxcodec/fx_codec.h"
-class CWin32FontInfo : public IFX_SystemFontInfo
+class CWin32FontInfo FX_FINAL : public IFX_SystemFontInfo
 {
 public:
     CWin32FontInfo();
     ~CWin32FontInfo();
     virtual void                Release();
     virtual     FX_BOOL         EnumFontList(CFX_FontMapper* pMapper);
     virtual void*               MapFont(int weight, FX_BOOL bItalic, int charset, int pitch_family, FX_LPCSTR face, FX_BOOL& bExact);
     virtual void*               GetFont(FX_LPCSTR face)
     {
         return NULL;
@@ skipping 1161 matching lines @@
     if (m_hDC) {
         SelectObject(m_hDC, m_hOldBitmap);
         DeleteDC(m_hDC);
     }
     if (m_hBitmap) {
         DeleteObject(m_hBitmap);
     }
     delete GetBitmap();
 }
 #endif