Underline Thickness is not uniform

Source/core/css/CSSComputedStyleDeclaration.cpp

 /*
  * Copyright (C) 2004 Zack Rusin <zack@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2011 Sencha, Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
@@ skipping 1254 matching lines @@
     case TextDecorationStyleSolid:
         return cssValuePool().createIdentifierValue(CSSValueSolid);
     case TextDecorationStyleDouble:
         return cssValuePool().createIdentifierValue(CSSValueDouble);
     case TextDecorationStyleDotted:
         return cssValuePool().createIdentifierValue(CSSValueDotted);
     case TextDecorationStyleDashed:
         return cssValuePool().createIdentifierValue(CSSValueDashed);
     case TextDecorationStyleWavy:
         return cssValuePool().createIdentifierValue(CSSValueWavy);
+    case TextDecorationStyleNone:
+        break;
     }
 
     ASSERT_NOT_REACHED();
     return cssValuePool().createExplicitInitialValue();
 }
 
 static PassRefPtrWillBeRawPtr<CSSValue> valueForFillRepeat(EFillRepeat xRepeat, EFillRepeat yRepeat)
 {
     // For backwards compatibility, if both values are equal, just return one of them. And
     // if the two values are equivalent to repeat-x or repeat-y, just return the shorthand.
@@ skipping 1757 matching lines @@
     static const CSSPropertyID propertiesAfterSlashSeperator[3] = { CSSPropertyBackgroundSize, CSSPropertyBackgroundOrigin,
                                                                     CSSPropertyBackgroundClip };
 
     RefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createSlashSeparated();
     list->append(valuesForShorthandProperty(StylePropertyShorthand(CSSPropertyBackground, propertiesBeforeSlashSeperator, WTF_ARRAY_LENGTH(propertiesBeforeSlashSeperator))));
     list->append(valuesForShorthandProperty(StylePropertyShorthand(CSSPropertyBackground, propertiesAfterSlashSeperator, WTF_ARRAY_LENGTH(propertiesAfterSlashSeperator))));
     return list.release();
 }
 
 } // namespace WebCore