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

Source/core/rendering/style/StyleRareNonInheritedData.cpp

Index: Source/core/rendering/style/StyleRareNonInheritedData.cpp
diff --git a/Source/core/rendering/style/StyleRareNonInheritedData.cpp b/Source/core/rendering/style/StyleRareNonInheritedData.cpp
index d9d985d07e6885fe3ffebc2b02d0752a903667aa..b2c7cdd0cae8820f668e6a431206ca77f68fa3fb 100644
--- a/Source/core/rendering/style/StyleRareNonInheritedData.cpp
+++ b/Source/core/rendering/style/StyleRareNonInheritedData.cpp
@@ -79,6 +79,8 @@ StyleRareNonInheritedData::StyleRareNonInheritedData()
     , m_touchAction(RenderStyle::initialTouchAction())
     , m_objectFit(RenderStyle::initialObjectFit())
     , m_isolation(RenderStyle::initialIsolation())
+    , m_justifySelf(RenderStyle::initialJustifySelf())
+    , m_justifySelfOverflowAlignment(RenderStyle::initialJustifySelfOverflowAlignment())
 {
     m_maskBoxImage.setMaskDefaults();
 }
@@ -155,6 +157,8 @@ StyleRareNonInheritedData::StyleRareNonInheritedData(const StyleRareNonInherited
     , m_touchAction(o.m_touchAction)
     , m_objectFit(o.m_objectFit)
     , m_isolation(o.m_isolation)
+    , m_justifySelf(o.m_justifySelf)
+    , m_justifySelfOverflowAlignment(o.m_justifySelfOverflowAlignment)
 {
 }
 
@@ -234,7 +238,9 @@ bool StyleRareNonInheritedData::operator==(const StyleRareNonInheritedData& o) c
         && m_hasAspectRatio == o.m_hasAspectRatio
         && m_touchAction == o.m_touchAction
         && m_objectFit == o.m_objectFit
-        && m_isolation == o.m_isolation;
+        && m_isolation == o.m_isolation
+        && m_justifySelf == o.m_justifySelf
+        && m_justifySelfOverflowAlignment == o.m_justifySelfOverflowAlignment;
 }
 
 bool StyleRareNonInheritedData::contentDataEquivalent(const StyleRareNonInheritedData& o) const