Check visited color for visual diff.

Source/core/layout/style/LayoutStyle.cpp

 /*
  * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Adobe Systems Incorporated. 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 678 matching lines @@
 
         if (rareNonInheritedData->opacity != other.rareNonInheritedData->opacity)
             diff.setOpacityChanged();
 
         if (rareNonInheritedData->m_filter != other.rareNonInheritedData->m_filter)
             diff.setFilterChanged();
     }
 
     if (!diff.needsPaintInvalidation()) {
         if (inherited->color != other.inherited->color
+            || inherited->visitedLinkColor != other.inherited->visitedLinkColor
             || inherited_flags.m_textUnderline != other.inherited_flags.m_textUnderline
             || visual->textDecoration != other.visual->textDecoration) {
             diff.setTextOrColorChanged();
         } else if (rareNonInheritedData.get() != other.rareNonInheritedData.get()) {
             if (rareNonInheritedData->m_textDecorationStyle != other.rareNonInheritedData->m_textDecorationStyle
                 || rareNonInheritedData->m_textDecorationColor != other.rareNonInheritedData->m_textDecorationColor)
                 diff.setTextOrColorChanged();
         } else if (rareInheritedData.get() != other.rareInheritedData.get()) {
             if (rareInheritedData->textFillColor() != other.rareInheritedData->textFillColor()
                 || rareInheritedData->textStrokeColor() != other.rareInheritedData->textStrokeColor()
@@ skipping 956 matching lines @@
         horizontal || includeLogicalRightEdge);
 
     edges[BSLeft] = BorderEdge(borderLeftWidth(),
         visitedDependentColor(CSSPropertyBorderLeftColor),
         borderLeftStyle(),
         borderLeftIsTransparent(),
         !horizontal || includeLogicalLeftEdge);
 }
 
 } // namespace blink