Use removeFontFace to avoid resetting fontSelector.

Source/web/WebSettingsImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 47 matching lines @@
     , m_clobberUserAgentInitialScaleQuirk(false)
     , m_pinchOverlayScrollbarThickness(0)
     , m_mainFrameResizesAreOrientationChanges(false)
 {
     ASSERT(settings);
 }
 
 void WebSettingsImpl::setStandardFontFamily(const WebString& font, UScriptCode script)
 {
     m_settings->genericFontFamilySettings().setStandard(font, script);
+    m_settings->notifyGenericFontFamilyChange();
 }
 
 void WebSettingsImpl::setFixedFontFamily(const WebString& font, UScriptCode script)
 {
     m_settings->genericFontFamilySettings().setFixed(font, script);
+    m_settings->notifyGenericFontFamilyChange();
 }
 
 void WebSettingsImpl::setSerifFontFamily(const WebString& font, UScriptCode script)
 {
     m_settings->genericFontFamilySettings().setSerif(font, script);
+    m_settings->notifyGenericFontFamilyChange();
 }
 
 void WebSettingsImpl::setSansSerifFontFamily(const WebString& font, UScriptCode script)
 {
     m_settings->genericFontFamilySettings().setSansSerif(font, script);
+    m_settings->notifyGenericFontFamilyChange();
 }
 
 void WebSettingsImpl::setCursiveFontFamily(const WebString& font, UScriptCode script)
 {
     m_settings->genericFontFamilySettings().setCursive(font, script);
+    m_settings->notifyGenericFontFamilyChange();
 }
 
 void WebSettingsImpl::setFantasyFontFamily(const WebString& font, UScriptCode script)
 {
     m_settings->genericFontFamilySettings().setFantasy(font, script);
+    m_settings->notifyGenericFontFamilyChange();
 }
 
 void WebSettingsImpl::setPictographFontFamily(const WebString& font, UScriptCode script)
 {
     m_settings->genericFontFamilySettings().setPictograph(font, script);
+    m_settings->notifyGenericFontFamilyChange();
 }
 
 void WebSettingsImpl::setDefaultFontSize(int size)
 {
     m_settings->setDefaultFontSize(size);
 }
 
 void WebSettingsImpl::setDefaultFixedFontSize(int size)
 {
     m_settings->setDefaultFixedFontSize(size);
@@ skipping 638 matching lines @@
 {
     m_settings->setUseSolidColorScrollbars(enabled);
 }
 
 void WebSettingsImpl::setMainFrameResizesAreOrientationChanges(bool enabled)
 {
     m_mainFrameResizesAreOrientationChanges = enabled;
 }
 
 } // namespace blink