[css-grid] Implement grid gutters

third_party/WebKit/Source/core/style/StyleGridData.cpp

Index: third_party/WebKit/Source/core/style/StyleGridData.cpp
diff --git a/third_party/WebKit/Source/core/style/StyleGridData.cpp b/third_party/WebKit/Source/core/style/StyleGridData.cpp
index 513ee8f59514ce5f96f9b662775f124f3caeb2c4..c0d5b47769ecc219daf8a72ac3717568e82e3ca2 100644
--- a/third_party/WebKit/Source/core/style/StyleGridData.cpp
+++ b/third_party/WebKit/Source/core/style/StyleGridData.cpp
@@ -43,6 +43,8 @@ StyleGridData::StyleGridData()
     , m_namedGridArea(ComputedStyle::initialNamedGridArea())
     , m_namedGridAreaRowCount(ComputedStyle::initialNamedGridAreaCount())
     , m_namedGridAreaColumnCount(ComputedStyle::initialNamedGridAreaCount())
+    , m_gridColumnGap(ComputedStyle::initialGridColumnGap())
+    , m_gridRowGap(ComputedStyle::initialGridRowGap())
 {
 }
 
@@ -60,6 +62,8 @@ StyleGridData::StyleGridData(const StyleGridData& o)
     , m_namedGridArea(o.m_namedGridArea)
     , m_namedGridAreaRowCount(o.m_namedGridAreaRowCount)
     , m_namedGridAreaColumnCount(o.m_namedGridAreaColumnCount)
+    , m_gridColumnGap(o.m_gridColumnGap)
+    , m_gridRowGap(o.m_gridRowGap)
 {
 }