Move MediaQuery classes off BlinkGC heap

third_party/WebKit/Source/core/css/CSSStyleSheet.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2006, 2007, 2012 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 184 matching lines @@
 }
 
 void CSSStyleSheet::setDisabled(bool disabled) {
   if (disabled == m_isDisabled)
     return;
   m_isDisabled = disabled;
 
   didMutate();
 }
 
-void CSSStyleSheet::setMediaQueries(MediaQuerySet* mediaQueries) {
-  m_mediaQueries = mediaQueries;
+void CSSStyleSheet::setMediaQueries(RefPtr<MediaQuerySet> mediaQueries) {
+  m_mediaQueries = std::move(mediaQueries);
   if (m_mediaCSSOMWrapper && m_mediaQueries)
     m_mediaCSSOMWrapper->reattach(m_mediaQueries.get());
 }
 
 bool CSSStyleSheet::matchesMediaQueries(const MediaQueryEvaluator& evaluator) {
   m_viewportDependentMediaQueryResults.clear();
   m_deviceDependentMediaQueryResults.clear();
 
   if (!m_mediaQueries)
     return true;
-  return evaluator.eval(m_mediaQueries, &m_viewportDependentMediaQueryResults,
+  return evaluator.eval(*m_mediaQueries, &m_viewportDependentMediaQueryResults,
                         &m_deviceDependentMediaQueryResults);
 }
 
 unsigned CSSStyleSheet::length() const {
   return m_contents->ruleCount();
 }
 
 CSSRule* CSSStyleSheet::item(unsigned index) {
   unsigned ruleCount = length();
   if (index >= ruleCount)
@@ skipping 209 matching lines @@
 void CSSStyleSheet::setText(const String& text) {
   m_childRuleCSSOMWrappers.clear();
 
   CSSStyleSheet::RuleMutationScope mutationScope(this);
   m_contents->clearRules();
   m_contents->parseString(text);
 }
 
 DEFINE_TRACE(CSSStyleSheet) {
   visitor->trace(m_contents);
-  visitor->trace(m_mediaQueries);
-  visitor->trace(m_viewportDependentMediaQueryResults);
-  visitor->trace(m_deviceDependentMediaQueryResults);
   visitor->trace(m_ownerNode);
   visitor->trace(m_ownerRule);
   visitor->trace(m_mediaCSSOMWrapper);
   visitor->trace(m_childRuleCSSOMWrappers);
   visitor->trace(m_ruleListCSSOMWrapper);
   StyleSheet::trace(visitor);
 }
 
 }  // namespace blink