PurgeMemory.

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 34 matching lines @@
     void clearParentStyleSheet() { m_parentStyleSheet = nullptr; }
 
     String href() const { return m_strHref; }
     StyleSheetContents* styleSheet() const { return m_styleSheet.get(); }
 
     bool isLoading() const;
     MediaQuerySet* mediaQueries() { return m_mediaQueries.get(); }
 
     void requestStyleSheet();
 
+    void purgeMemory();
+
     DECLARE_TRACE_AFTER_DISPATCH();
 
 private:
     // FIXME: inherit from StyleSheetResourceClient directly to eliminate raw back pointer, as there are no space savings in this.
     // NOTE: We put the StyleSheetResourceClient in a member instead of inheriting from it
     // to avoid adding a vptr to StyleRuleImport.
     class ImportedStyleSheetClient final : public StyleSheetResourceClient {
         DISALLOW_NEW();
     public:
         ImportedStyleSheetClient(StyleRuleImport* ownerRule) : m_ownerRule(ownerRule) { }
@@ skipping 26 matching lines @@
     RefPtrWillBeMember<StyleSheetContents> m_styleSheet;
     ResourcePtr<CSSStyleSheetResource> m_resource;
     bool m_loading;
 };
 
 DEFINE_STYLE_RULE_TYPE_CASTS(Import);
 
 } // namespace blink
 
 #endif