[CSS Grid Layout] Upgrade justify-content parsing to CSS3 Box Alignment spec.

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 57c810a017477e440462ba1bf3e15398238d1c43..ec6e7525976dc1de3866c38752b3a438875be3af 100644
--- a/Source/core/rendering/style/StyleRareNonInheritedData.cpp
+++ b/Source/core/rendering/style/StyleRareNonInheritedData.cpp
@@ -66,6 +66,8 @@ StyleRareNonInheritedData::StyleRareNonInheritedData()
     , m_alignSelf(RenderStyle::initialAlignSelf())
     , m_alignSelfOverflowAlignment(RenderStyle::initialAlignSelfOverflowAlignment())
     , m_justifyContent(RenderStyle::initialJustifyContent())
+    , m_justifyContentDistribution(RenderStyle::initialJustifyContentDistribution())
+    , m_justifyContentOverflowAlignment(RenderStyle::initialJustifyContentOverflowAlignment())
     , userDrag(RenderStyle::initialUserDrag())
     , textOverflow(RenderStyle::initialTextOverflow())
     , marginBeforeCollapse(MCOLLAPSE)
@@ -150,6 +152,8 @@ StyleRareNonInheritedData::StyleRareNonInheritedData(const StyleRareNonInherited
     , m_alignSelf(o.m_alignSelf)
     , m_alignSelfOverflowAlignment(o.m_alignSelfOverflowAlignment)
     , m_justifyContent(o.m_justifyContent)
+    , m_justifyContentDistribution(o.m_justifyContentDistribution)
+    , m_justifyContentOverflowAlignment(o.m_justifyContentOverflowAlignment)
     , userDrag(o.userDrag)
     , textOverflow(o.textOverflow)
     , marginBeforeCollapse(o.marginBeforeCollapse)
@@ -241,6 +245,8 @@ bool StyleRareNonInheritedData::operator==(const StyleRareNonInheritedData& o) c
         && m_alignSelf == o.m_alignSelf
         && m_alignSelfOverflowAlignment == o.m_alignSelfOverflowAlignment
         && m_justifyContent == o.m_justifyContent
+        && m_justifyContentDistribution == o.m_justifyContentDistribution
+        && m_justifyContentOverflowAlignment == o.m_justifyContentOverflowAlignment
         && userDrag == o.userDrag
         && textOverflow == o.textOverflow
         && marginBeforeCollapse == o.marginBeforeCollapse