[CSS Grid Layout] Implement 'justify-self' parsing

Source/core/css/resolver/StyleBuilderCustom.cpp

Index: Source/core/css/resolver/StyleBuilderCustom.cpp
diff --git a/Source/core/css/resolver/StyleBuilderCustom.cpp b/Source/core/css/resolver/StyleBuilderCustom.cpp
index e56e1aa9c9bcc3aed21c9d93303010d903327ed4..b8db6fa9fef7906ec184383c2035f3bceb65c12a 100755
--- a/Source/core/css/resolver/StyleBuilderCustom.cpp
+++ b/Source/core/css/resolver/StyleBuilderCustom.cpp
@@ -59,6 +59,7 @@
 #include "core/css/CSSReflectValue.h"
 #include "core/css/CSSVariableValue.h"
 #include "core/css/Counter.h"
+#include "core/css/Pair.h"
 #include "core/css/Rect.h"
 #include "core/css/StylePropertySet.h"
 #include "core/css/StyleRule.h"
@@ -1700,6 +1701,18 @@ void StyleBuilder::oldApplyProperty(CSSPropertyID id, StyleResolverState& state,
         return;
     }
 
+    case CSSPropertyJustifySelf: {
+        HANDLE_INHERIT_AND_INITIAL(justifySelf, JustifySelf);
+        CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
+        if (Pair* pairValue = primitiveValue->getPairValue()) {
+            state.style()->setJustifySelf(*pairValue->first());
+            state.style()->setJustifySelfOverflowAlignment(*pairValue->second());
+        } else {
+            state.style()->setJustifySelf(*primitiveValue);
+        }
+        return;
+    }
+
     // These properties are aliased and we already applied the property on the prefixed version.
     case CSSPropertyAnimationDelay:
     case CSSPropertyAnimationDirection: