Made StyleEngine CSSFontSelectorClient instead of StyleResolver.

Source/core/css/resolver/StyleResolver.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 329 matching lines @@
     if (!m_styleSharingLists[depth])
         m_styleSharingLists[depth] = adoptPtr(new StyleSharingList);
     return *m_styleSharingLists[depth];
 }
 
 void StyleResolver::clearStyleSharingList()
 {
     m_styleSharingLists.resize(0);
 }
 
-void StyleResolver::fontsNeedUpdate(CSSFontSelector* fontSelector)
-{
-    invalidateMatchedPropertiesCache();
-    m_document.setNeedsStyleRecalc(SubtreeStyleChange);
-}
-
 void StyleResolver::pushParentElement(Element& parent)
 {
     const ContainerNode* parentsParent = parent.parentOrShadowHostElement();
 
     // We are not always invoked consistently. For example, script execution can cause us to enter
     // style recalc in the middle of tree building. We may also be invoked from somewhere within the tree.
     // Reset the stack in this case, or if we see a new root element.
     // Otherwise just push the new parent.
     if (!parentsParent || m_selectorFilter.parentStackIsEmpty())
         m_selectorFilter.setupParentStack(parent);
@@ skipping 1133 matching lines @@
 {
     visitor->trace(m_keyframesRuleMap);
     visitor->trace(m_viewportDependentMediaQueryResults);
     visitor->trace(m_viewportStyleResolver);
     visitor->trace(m_features);
     visitor->trace(m_siblingRuleSet);
     visitor->trace(m_uncommonAttributeRuleSet);
     visitor->trace(m_watchedSelectorsRules);
     visitor->trace(m_treeBoundaryCrossingRules);
     visitor->trace(m_pendingStyleSheets);
-    CSSFontSelectorClient::trace(visitor);
 }
 
 } // namespace WebCore