Move MediaQuery classes off BlinkGC heap

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

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2006, 2007, 2008, 2009, 2010, 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.
  *
@@ skipping 82 matching lines @@
   CSSRule* item(unsigned index);
 
   void ClearOwnerNode() override;
 
   CSSRule* ownerRule() const override { return owner_rule_; }
   KURL BaseURL() const override;
   bool IsLoading() const override;
 
   void ClearOwnerRule() { owner_rule_ = nullptr; }
   Document* OwnerDocument() const;
-  const MediaQuerySet* MediaQueries() const { return media_queries_; }
-  void SetMediaQueries(MediaQuerySet*);
+  const MediaQuerySet* MediaQueries() const { return media_queries_.Get(); }
+  void SetMediaQueries(RefPtr<MediaQuerySet>);
   bool MatchesMediaQueries(const MediaQueryEvaluator&);
   const MediaQueryResultList& ViewportDependentMediaQueryResults() const {
     return viewport_dependent_media_query_results_;
   }
   const MediaQueryResultList& DeviceDependentMediaQueryResults() const {
     return device_dependent_media_query_results_;
   }
   void SetTitle(const String& title) { title_ = title; }
   // Set by LinkStyle iff CORS-enabled fetch of stylesheet succeeded from this
   // origin.
@@ skipping 42 matching lines @@
 
   bool CanAccessRules() const;
 
   void SetLoadCompleted(bool);
 
   Member<StyleSheetContents> contents_;
   bool is_inline_stylesheet_ = false;
   bool is_disabled_ = false;
   bool load_completed_ = false;
   String title_;
-  Member<MediaQuerySet> media_queries_;
+  RefPtr<MediaQuerySet> media_queries_;
   MediaQueryResultList viewport_dependent_media_query_results_;
   MediaQueryResultList device_dependent_media_query_results_;
 
   RefPtr<SecurityOrigin> allow_rule_access_from_origin_;
 
   Member<Node> owner_node_;
   Member<CSSRule> owner_rule_;
 
   TextPosition start_position_;
   mutable Member<MediaList> media_cssom_wrapper_;
@@ skipping 20 matching lines @@
 
 DEFINE_TYPE_CASTS(CSSStyleSheet,
                   StyleSheet,
                   sheet,
                   sheet->IsCSSStyleSheet(),
                   sheet.IsCSSStyleSheet());
 
 }  // namespace blink
 
 #endif