Pseudo and non pseudo elements should return correct computed content value

third_party/WebKit/Source/core/css/ComputedStyleCSSValueMapping.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.
  * Copyright (C) 2015 Google 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
@@ skipping 2361 matching lines @@
         if (style.getTextCombine() == TextCombineAll)
             return CSSPrimitiveValue::createIdentifier(CSSValueHorizontal);
     case CSSPropertyTextCombineUpright:
         return cssValuePool().createValue(style.getTextCombine());
     case CSSPropertyWebkitTextOrientation:
         if (style.getTextOrientation() == TextOrientationMixed)
             return CSSPrimitiveValue::createIdentifier(CSSValueVerticalRight);
     case CSSPropertyTextOrientation:
         return CSSPrimitiveValue::create(style.getTextOrientation());
     case CSSPropertyContent:
+        if (style.styleType() == PseudoIdNone)
+            return cssValuePool().createIdentifierValue(CSSValueNormal);
+        if (!style.hasContent() && (style.styleType() == PseudoIdBefore || style.styleType() == PseudoIdAfter))
+            return cssValuePool().createIdentifierValue(CSSValueNone);
         return valueForContentData(style);
     case CSSPropertyCounterIncrement:
         return valueForCounterDirectives(style, propertyID);
     case CSSPropertyCounterReset:
         return valueForCounterDirectives(style, propertyID);
     case CSSPropertyWebkitClipPath:
         if (ClipPathOperation* operation = style.clipPath()) {
             if (operation->type() == ClipPathOperation::SHAPE)
                 return valueForBasicShape(style, toShapeClipPathOperation(operation)->basicShape());
             if (operation->type() == ClipPathOperation::REFERENCE)
@@ skipping 362 matching lines @@
     case CSSPropertyAll:
         return nullptr;
     default:
         break;
     }
     ASSERT_NOT_REACHED();
     return nullptr;
 }
 
 } // namespace blink