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 187 matching lines @@
 }
 
 void CSSStyleSheet::setDisabled(bool disabled) {
   if (disabled == is_disabled_)
     return;
   is_disabled_ = disabled;
 
   DidMutate();
 }
 
-void CSSStyleSheet::SetMediaQueries(MediaQuerySet* media_queries) {
+void CSSStyleSheet::SetMediaQueries(PassRefPtr<MediaQuerySet> media_queries) {
   media_queries_ = media_queries;
   if (media_cssom_wrapper_ && media_queries_)
     media_cssom_wrapper_->Reattach(media_queries_.Get());
 }
 
 bool CSSStyleSheet::MatchesMediaQueries(const MediaQueryEvaluator& evaluator) {
   viewport_dependent_media_query_results_.clear();
   device_dependent_media_query_results_.clear();
 
   if (!media_queries_)
     return true;
-  return evaluator.Eval(media_queries_,
+  return evaluator.Eval(*media_queries_,
                         &viewport_dependent_media_query_results_,
                         &device_dependent_media_query_results_);
 }
 
 unsigned CSSStyleSheet::length() const {
   return contents_->RuleCount();
 }
 
 CSSRule* CSSStyleSheet::item(unsigned index) {
   unsigned rule_count = length();
@@ skipping 204 matching lines @@
 void CSSStyleSheet::SetText(const String& text) {
   child_rule_cssom_wrappers_.clear();
 
   CSSStyleSheet::RuleMutationScope mutation_scope(this);
   contents_->ClearRules();
   contents_->ParseString(text);
 }
 
 DEFINE_TRACE(CSSStyleSheet) {
   visitor->Trace(contents_);
-  visitor->Trace(media_queries_);
-  visitor->Trace(viewport_dependent_media_query_results_);
-  visitor->Trace(device_dependent_media_query_results_);
   visitor->Trace(owner_node_);
   visitor->Trace(owner_rule_);
   visitor->Trace(media_cssom_wrapper_);
   visitor->Trace(child_rule_cssom_wrappers_);
   visitor->Trace(rule_list_cssom_wrapper_);
   StyleSheet::Trace(visitor);
 }
 
 }  // namespace blink