[Oilpan] Prepare full definition of classes before using Member

third_party/WebKit/Source/core/css/resolver/StyleResolver.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 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 119 matching lines @@
         CrossOriginCSSRules = 1 << 4,
         AllButEmptyCSSRules = UAAndUserCSSRules | AuthorCSSRules | CrossOriginCSSRules,
         AllCSSRules         = AllButEmptyCSSRules | EmptyCSSRules,
     };
     PassRefPtrWillBeRawPtr<CSSRuleList> cssRulesForElement(Element*, unsigned rulesToInclude = AllButEmptyCSSRules);
     PassRefPtrWillBeRawPtr<CSSRuleList> pseudoCSSRulesForElement(Element*, PseudoId, unsigned rulesToInclude = AllButEmptyCSSRules);
     PassRefPtrWillBeRawPtr<StyleRuleList> styleRulesForElement(Element*, unsigned rulesToInclude);
 
     void computeFont(ComputedStyle*, const StylePropertySet&);
 
-    ViewportStyleResolver* viewportStyleResolver() { return m_viewportStyleResolver.get(); }
+    ViewportStyleResolver* viewportStyleResolver() const;
 
     void addMediaQueryResults(const MediaQueryResultList&);
     MediaQueryResultList* viewportDependentMediaQueryResults() { return &m_viewportDependentMediaQueryResults; }
     bool hasViewportDependentMediaQueries() const { return !m_viewportDependentMediaQueryResults.isEmpty(); }
     bool mediaQueryAffectedByViewportChange() const;
 
     // FIXME: Rename to reflect the purpose, like didChangeFontSize or something.
     void invalidateMatchedPropertiesCache();
 
     void notifyResizeForViewportUnits();
@@ skipping 113 matching lines @@
 
     OwnPtr<StyleResolverStats> m_styleResolverStats;
 
     // Use only for Internals::updateStyleAndReturnAffectedElementCount.
     unsigned m_accessCount;
 };
 
 } // namespace blink
 
 #endif // StyleResolver_h