CSS Properties and Values API: Support non-inherited custom properties

third_party/WebKit/Source/core/style/StyleRareNonInheritedData.h

Index: third_party/WebKit/Source/core/style/StyleRareNonInheritedData.h
diff --git a/third_party/WebKit/Source/core/style/StyleRareNonInheritedData.h b/third_party/WebKit/Source/core/style/StyleRareNonInheritedData.h
index 6412191386680075ebabad4bff9eafe5740ff89d..c49db7262c6fff2f7f9abef65736f0e81dfdfb49 100644
--- a/third_party/WebKit/Source/core/style/StyleRareNonInheritedData.h
+++ b/third_party/WebKit/Source/core/style/StyleRareNonInheritedData.h
@@ -58,6 +58,7 @@ class StyleFlexibleBoxData;
 class StyleGridData;
 class StyleGridItemData;
 class StyleMultiColData;
+class StyleNonInheritedVariables;
 class StyleReflection;
 class StyleTransformData;
 class StyleWillChangeData;
@@ -156,6 +157,8 @@ public:
 
     std::unique_ptr<Vector<Persistent<StyleImage>>> m_paintImages;
 
+    std::unique_ptr<StyleNonInheritedVariables> m_variables;
+
     StyleContentAlignmentData m_alignContent;
     StyleSelfAlignmentData m_alignItems;
     StyleSelfAlignmentData m_alignSelf;