hr color attribute not working.

Source/core/html/HTMLHRElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2010 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 58 matching lines @@
         int v = value.toInt(&ok);
         if (ok && !v)
             addPropertyToPresentationAttributeStyle(style, CSSPropertyWidth, 1, CSSPrimitiveValue::CSS_PX);
         else
             addHTMLLengthToStyle(style, CSSPropertyWidth, value);
     } else if (name == colorAttr) {
         addPropertyToPresentationAttributeStyle(style, CSSPropertyBorderStyle, CSSValueSolid);
         addHTMLColorToStyle(style, CSSPropertyBorderColor, value);
         addHTMLColorToStyle(style, CSSPropertyBackgroundColor, value);
     } else if (name == noshadeAttr) {
-        addPropertyToPresentationAttributeStyle(style, CSSPropertyBorderStyle, CSSValueSolid);
+        if (!hasAttribute(colorAttr)) {
+            addPropertyToPresentationAttributeStyle(style, CSSPropertyBorderStyle, CSSValueSolid);
 
-        RefPtrWillBeRawPtr<CSSPrimitiveValue> darkGrayValue = cssValuePool().createColorValue(Color::darkGray);
-        style->setProperty(CSSPropertyBorderColor, darkGrayValue);
-        style->setProperty(CSSPropertyBackgroundColor, darkGrayValue);
+            RefPtrWillBeRawPtr<CSSPrimitiveValue> darkGrayValue = cssValuePool().createColorValue(Color::darkGray);
+            style->setProperty(CSSPropertyBorderColor, darkGrayValue);
+            style->setProperty(CSSPropertyBackgroundColor, darkGrayValue);
+        }
     } else if (name == sizeAttr) {
         StringImpl* si = value.impl();
         int size = si->toInt();
         if (size <= 1)
             addPropertyToPresentationAttributeStyle(style, CSSPropertyBorderBottomWidth, 0, CSSPrimitiveValue::CSS_PX);
         else
             addPropertyToPresentationAttributeStyle(style, CSSPropertyHeight, size - 2, CSSPrimitiveValue::CSS_PX);
     } else
         HTMLElement::collectStyleForPresentationAttribute(name, value, style);
 }
 
 }