Broaden justify-self's parsing name

Source/core/css/CSSComputedStyleDeclaration.cpp

Index: Source/core/css/CSSComputedStyleDeclaration.cpp
diff --git a/Source/core/css/CSSComputedStyleDeclaration.cpp b/Source/core/css/CSSComputedStyleDeclaration.cpp
index 6a1a2b1828d2a954df9f5ac7b24609ba69481b1d..5f7660302e72e624de92640996225e146e1fbe37 100644
--- a/Source/core/css/CSSComputedStyleDeclaration.cpp
+++ b/Source/core/css/CSSComputedStyleDeclaration.cpp
@@ -2108,7 +2108,7 @@ PassRefPtr<CSSValue> CSSComputedStyleDeclaration::getPropertyCSSValue(CSSPropert
         case CSSPropertyJustifySelf: {
             RefPtr<CSSValueList> result = CSSValueList::createSpaceSeparated();
             result->append(CSSPrimitiveValue::create(style->justifySelf()));
-            if (style->justifySelf() >= JustifySelfCenter && style->justifySelfOverflowAlignment() != JustifySelfOverflowAlignmentDefault)
+            if (style->justifySelf() >= ItemPositionCenter && style->justifySelfOverflowAlignment() != OverflowAlignmentDefault)
                 result->append(CSSPrimitiveValue::create(style->justifySelfOverflowAlignment()));
             return result.release();
         }