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 1a8c0b31195c1c1da54e1d38bca390219d744475..27c3ea7ccf88ce7cd40cdbd2d6c480dc5f51bbdf 100644
--- a/Source/core/style/ComputedStyle.h
+++ b/Source/core/style/ComputedStyle.h
@@ -591,6 +591,11 @@ public:
     TextDecorationStyle textDecorationStyle() const { return static_cast<TextDecorationStyle>(rareNonInheritedData->m_textDecorationStyle); }
     float wordSpacing() const;
     float letterSpacing() const;
+    StyleVariableData* variables() const;
+    void setVariables(PassRefPtr<StyleVariableData>);
+
+    void setVariable(const AtomicString&, CSSVariableData*);
+    void removeVariable(const AtomicString&);
 
     float zoom() const { return visual->m_zoom; }
     float effectiveZoom() const { return rareInheritedData->m_effectiveZoom; }
@@ -1707,6 +1712,7 @@ public:
     static TouchAction initialTouchAction() { return TouchActionAuto; }
     static ShadowList* initialBoxShadow() { return 0; }
     static ShadowList* initialTextShadow() { return 0; }
+    static StyleVariableData* initialVariables() { return nullptr; }
     static ScrollBehavior initialScrollBehavior() { return ScrollBehaviorAuto; }
     static WebScrollBlocksOn initialScrollBlocksOn() { return WebScrollBlocksOnNone; }
     static ScrollSnapType initialScrollSnapType() { return ScrollSnapTypeNone; }