[Slimming paint] [New Multicolumn] Repaint column rules when they change.

Source/core/rendering/style/RenderStyle.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * 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
@@ skipping 791 matching lines @@
     bool hasAutoColumnWidth() const { return rareNonInheritedData->m_multiCol->m_autoWidth; }
     unsigned short columnCount() const { return rareNonInheritedData->m_multiCol->m_count; }
     bool hasAutoColumnCount() const { return rareNonInheritedData->m_multiCol->m_autoCount; }
     bool specifiesColumns() const { return !hasAutoColumnCount() || !hasAutoColumnWidth(); }
     ColumnFill columnFill() const { return static_cast<ColumnFill>(rareNonInheritedData->m_multiCol->m_fill); }
     float columnGap() const { return rareNonInheritedData->m_multiCol->m_gap; }
     bool hasNormalColumnGap() const { return rareNonInheritedData->m_multiCol->m_normalGap; }
     EBorderStyle columnRuleStyle() const { return rareNonInheritedData->m_multiCol->m_rule.style(); }
     unsigned short columnRuleWidth() const { return rareNonInheritedData->m_multiCol->ruleWidth(); }
     bool columnRuleIsTransparent() const { return rareNonInheritedData->m_multiCol->m_rule.isTransparent(); }
+    bool columnRuleEquivalent(const RenderStyle* otherStyle) const;
     ColumnSpan columnSpan() const { return static_cast<ColumnSpan>(rareNonInheritedData->m_multiCol->m_columnSpan); }
     EPageBreak columnBreakBefore() const { return static_cast<EPageBreak>(rareNonInheritedData->m_multiCol->m_breakBefore); }
     EPageBreak columnBreakInside() const { return static_cast<EPageBreak>(rareNonInheritedData->m_multiCol->m_breakInside); }
     EPageBreak columnBreakAfter() const { return static_cast<EPageBreak>(rareNonInheritedData->m_multiCol->m_breakAfter); }
     bool hasInlineTransform() const { return rareNonInheritedData->m_hasInlineTransform; }
     const TransformOperations& transform() const { return rareNonInheritedData->m_transform->m_operations; }
     const TransformOrigin& transformOrigin() const { return rareNonInheritedData->m_transform->m_origin; }
     const Length& transformOriginX() const { return transformOrigin().x(); }
     const Length& transformOriginY() const { return transformOrigin().y(); }
     float transformOriginZ() const { return transformOrigin().z(); }
@@ skipping 1023 matching lines @@
 inline bool RenderStyle::hasPseudoElementStyle() const
 {
     return noninherited_flags.pseudoBits & PSEUDO_ELEMENT_MASK;
 }
 
 float calcBorderRadiiConstraintScaleFor(const FloatRect&, const FloatRoundedRect::Radii&);
 
 } // namespace blink
 
 #endif // RenderStyle_h