Use removeFontFace to avoid resetting fontSelector.

Source/core/css/CSSFontSelector.cpp

 /*
  * Copyright (C) 2007, 2008, 2011 Apple Inc. All rights reserved.
  *           (C) 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 198 matching lines @@
 void CSSFontSelector::beginLoadingFontSoon(FontResource* font)
 {
     m_fontLoader.addFontToBeginLoading(font);
 }
 
 void CSSFontSelector::loadPendingFonts()
 {
     m_fontLoader.loadPendingFonts();
 }
 
+void CSSFontSelector::updateGenericFontFamilySettings(Document& document)
+{
+    ASSERT(document.settings());
+    m_genericFontFamilySettings = document.settings()->genericFontFamilySettings();
 }
+
+}