CSS Custom Properties (Variables)

Source/core/style/ComputedStyle.h

Index: Source/core/style/ComputedStyle.h
diff --git a/Source/core/style/ComputedStyle.h b/Source/core/style/ComputedStyle.h
index 4099c5d08cd2cce6ec766e0924838a74652b6ed3..787a473ba0aa05f4fa159b2b284d53637fa83dd1 100644
--- a/Source/core/style/ComputedStyle.h
+++ b/Source/core/style/ComputedStyle.h
@@ -584,6 +584,9 @@ public:
     TextDecorationStyle textDecorationStyle() const { return static_cast<TextDecorationStyle>(rareNonInheritedData->m_textDecorationStyle); }
     float wordSpacing() const;
     float letterSpacing() const;
+    void createVariables();
+    StyleVariableData* variables() const;
+    void setVariables(PassRefPtr<StyleVariableData>);
 
     float zoom() const { return visual->m_zoom; }
     float effectiveZoom() const { return rareInheritedData->m_effectiveZoom; }
@@ -1693,6 +1696,7 @@ public:
     static TouchAction initialTouchAction() { return TouchActionAuto; }
     static ShadowList* initialBoxShadow() { return 0; }
     static ShadowList* initialTextShadow() { return 0; }
+    static StyleVariableData* initialVariables() { return 0; }
     static ScrollBehavior initialScrollBehavior() { return ScrollBehaviorAuto; }
     static WebScrollBlocksOn initialScrollBlocksOn() { return WebScrollBlocksOnNone; }
     static ScrollSnapType initialScrollSnapType() { return ScrollSnapTypeNone; }