Move MediaQuery classes off BlinkGC heap

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

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2002, 2006, 2008, 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 18 matching lines @@
 namespace blink {
 
 class CSSStyleSheetResource;
 class MediaQuerySet;
 class StyleSheetContents;
 
 class StyleRuleImport : public StyleRuleBase {
   USING_PRE_FINALIZER(StyleRuleImport, Dispose);
 
  public:
-  static StyleRuleImport* Create(const String& href, MediaQuerySet*);
+  static StyleRuleImport* Create(const String& href, RefPtr<MediaQuerySet>);
 
   ~StyleRuleImport();
 
   StyleSheetContents* ParentStyleSheet() const { return parent_style_sheet_; }
   void SetParentStyleSheet(StyleSheetContents* sheet) {
     DCHECK(sheet);
     parent_style_sheet_ = sheet;
   }
   void ClearParentStyleSheet() { parent_style_sheet_ = nullptr; }
 
@@ skipping 39 matching lines @@
    private:
     Member<StyleRuleImport> owner_rule_;
   };
 
   void SetCSSStyleSheet(const String& href,
                         const KURL& base_url,
                         ReferrerPolicy,
                         const String& charset,
                         const CSSStyleSheetResource*);
 
-  StyleRuleImport(const String& href, MediaQuerySet*);
+  StyleRuleImport(const String& href, RefPtr<MediaQuerySet>);
 
   void Dispose();
 
   Member<StyleSheetContents> parent_style_sheet_;
 
   Member<ImportedStyleSheetClient> style_sheet_client_;
   String str_href_;
-  Member<MediaQuerySet> media_queries_;
+  RefPtr<MediaQuerySet> media_queries_;
   Member<StyleSheetContents> style_sheet_;
   Member<CSSStyleSheetResource> resource_;
   bool loading_;
 };
 
 DEFINE_STYLE_RULE_TYPE_CASTS(Import);
 
 }  // namespace blink
 
 #endif