[Oilpan]: Move CSSFontSelectorClient to the oilpan heap using transition types.

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 379 matching lines @@
 }
 
 void StyleResolver::popParentShadowRoot(const ShadowRoot& shadowRoot)
 {
     ASSERT(shadowRoot.host());
     m_styleTree.popStyleCache(shadowRoot);
 }
 
 StyleResolver::~StyleResolver()
 {
-    m_viewportStyleResolver->clearDocument();
 }
 
 inline void StyleResolver::collectTreeBoundaryCrossingRules(Element* element, ElementRuleCollector& collector, bool includeEmptyRules)
 {
     if (m_treeBoundaryCrossingRules.isEmpty())
         return;
 
     RuleRange ruleRange = collector.matchedResult().ranges.authorRuleRange();
 
     // When comparing rules declared in outer treescopes, outer's rules win.
@@ skipping 1007 matching lines @@
 
 bool StyleResolver::mediaQueryAffectedByViewportChange() const
 {
     for (unsigned i = 0; i < m_viewportDependentMediaQueryResults.size(); ++i) {
         if (m_medium->eval(&m_viewportDependentMediaQueryResults[i]->m_expression) != m_viewportDependentMediaQueryResults[i]->m_result)
             return true;
     }
     return false;
 }
 
+void StyleResolver::trace(Visitor* visitor)
+{
+    visitor->trace(m_keyframesRuleMap);
+    visitor->trace(m_viewportDependentMediaQueryResults);
+    visitor->trace(m_viewportStyleResolver);
+    visitor->trace(m_siblingRuleSet);
+    visitor->trace(m_uncommonAttributeRuleSet);
+    visitor->trace(m_watchedSelectorsRules);
+    visitor->trace(m_treeBoundaryCrossingRules);
+}
+
 } // namespace WebCore