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 71c132621d8369d5138c3a993d331669364778ad..4e6657c653d9468396511d0b10fee21f5f924c16 100644
--- a/Source/core/style/ComputedStyle.h
+++ b/Source/core/style/ComputedStyle.h
@@ -583,6 +583,9 @@ 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; }
@@ -1665,6 +1668,7 @@ 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; }