Have const StyleResolverState return const RenderStyle

Source/core/css/resolver/StyleResolverState.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 64 matching lines @@
 class StyleResolverState {
 WTF_MAKE_NONCOPYABLE(StyleResolverState);
 public:
     StyleResolverState(const Document*, Element*, RenderStyle* parentStyle = 0, RenderRegion* regionForStyling = 0);
     ~StyleResolverState();
 
     // These are all just pass-through methods to ElementResolveContext.
     Document* document() const { return m_elementContext.document(); }
     Element* element() const { return m_elementContext.element(); }
     const ContainerNode* parentNode() const { return m_elementContext.parentNode(); }
-    RenderStyle* rootElementStyle() const { return m_elementContext.rootElementStyle(); }
+    const RenderStyle* rootElementStyle() const { return m_elementContext.rootElementStyle(); }
     EInsideLink elementLinkState() const { return m_elementContext.elementLinkState(); }
     bool distributedToInsertionPoint() const { return m_elementContext.distributedToInsertionPoint(); }
 
     const ElementResolveContext& elementContext() const { return m_elementContext; }
 
     void setStyle(PassRefPtr<RenderStyle> style) { m_style = style; }
-    RenderStyle* style() const { return m_style.get(); }
+    const RenderStyle* style() const { return m_style.get(); }
+    RenderStyle* style() { return m_style.get(); }
     PassRefPtr<RenderStyle> takeStyle() { return m_style.release(); }
 
     void setParentStyle(PassRefPtr<RenderStyle> parentStyle) { m_parentStyle = parentStyle; }
-    RenderStyle* parentStyle() const { return m_parentStyle.get(); }
+    const RenderStyle* parentStyle() const { return m_parentStyle.get(); }
+    RenderStyle* parentStyle() { return m_parentStyle.get(); }
 
     const RenderRegion* regionForStyling() const { return m_regionForStyling; }
 
     // FIXME: These are effectively side-channel "out parameters" for the various
     // map functions. When we map from CSS to style objects we use this state object
     // to track various meta-data about that mapping (e.g. if it's cache-able).
     // We need to move this data off of StyleResolverState and closer to the
     // objects it applies to. Possibly separating (immutable) inputs from (mutable) outputs.
     void setApplyPropertyToRegularStyle(bool isApply) { m_applyPropertyToRegularStyle = isApply; }
     void setApplyPropertyToVisitedLinkStyle(bool isApply) { m_applyPropertyToVisitedLinkStyle = isApply; }
@@ skipping 70 matching lines @@
 
     ElementStyleResources m_elementStyleResources;
     // CSSToStyleMap is a pure-logic class and only contains
     // a back-pointer to this object.
     CSSToStyleMap m_styleMap;
 };
 
 } // namespace WebCore
 
 #endif // StyleResolverState_h