Flexbox flex: 1 incorrectly sets flex-basis to 0px

Source/core/css/parser/CSSPropertyParser.cpp

 /*
  * Copyright (C) 2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
  * Copyright (C) 2012 Intel Corporation. All rights reserved.
  *
@@ skipping 5771 matching lines @@
             return false;
         }
         args->next();
     }
 
     if (flexGrow == unsetValue)
         flexGrow = 1;
     if (flexShrink == unsetValue)
         flexShrink = 1;
     if (!flexBasis)
-        flexBasis = cssValuePool().createValue(0, CSSPrimitiveValue::CSS_PX);
+        flexBasis = cssValuePool().createValue(0, CSSPrimitiveValue::CSS_PERCENTAGE);
 
     addProperty(CSSPropertyFlexGrow, cssValuePool().createValue(clampToFloat(flexGrow), CSSPrimitiveValue::CSS_NUMBER), important);
     addProperty(CSSPropertyFlexShrink, cssValuePool().createValue(clampToFloat(flexShrink), CSSPrimitiveValue::CSS_NUMBER), important);
     addProperty(CSSPropertyFlexBasis, flexBasis, important);
     return true;
 }
 
 bool CSSPropertyParser::parseObjectPosition(bool important)
 {
     RefPtrWillBeRawPtr<CSSValue> xValue = nullptr;
@@ skipping 2631 matching lines @@
         parsedValues->append(CSSPrimitiveValue::createIdentifier(CSSValueFill));
     if (!seenStroke)
         parsedValues->append(CSSPrimitiveValue::createIdentifier(CSSValueStroke));
     if (!seenMarkers)
         parsedValues->append(CSSPrimitiveValue::createIdentifier(CSSValueMarkers));
 
     return parsedValues.release();
 }
 
 } // namespace blink