Move shadowCascadeOrder to Document from StyleEngine

third_party/WebKit/Source/core/dom/StyleEngine.h

Index: third_party/WebKit/Source/core/dom/StyleEngine.h
diff --git a/third_party/WebKit/Source/core/dom/StyleEngine.h b/third_party/WebKit/Source/core/dom/StyleEngine.h
index 9dac03a9f5fc7670b72cd18a9c4f98d6caa4e45f..a2670ad92abcec7a515f0be9d15bd7e95f0cdd5b 100644
--- a/third_party/WebKit/Source/core/dom/StyleEngine.h
+++ b/third_party/WebKit/Source/core/dom/StyleEngine.h
@@ -54,12 +54,6 @@ class StyleRuleFontFace;
 class StyleSheet;
 class StyleSheetContents;
 
-enum ShadowCascadeOrder {
-    ShadowCascadeNone,
-    ShadowCascadeV0,
-    ShadowCascadeV1
-};
-
 class CORE_EXPORT StyleEngine final : public GarbageCollectedFinalized<StyleEngine>, public CSSFontSelectorClient  {
     USING_GARBAGE_COLLECTED_MIXIN(StyleEngine);
 public:
@@ -182,10 +176,6 @@ public:
     StyleResolverStats* stats() { return m_styleResolverStats.get(); }
     void setStatsEnabled(bool);
 
-    ShadowCascadeOrder shadowCascadeOrder() const { return m_shadowCascadeOrder; }
-    void setShadowCascadeOrder(ShadowCascadeOrder);
-    bool mayContainV0Shadow() const { return m_mayContainV0Shadow; }
-
     DECLARE_VIRTUAL_TRACE();
 
 private:
@@ -260,9 +250,6 @@ private:
 
     bool m_ignorePendingStylesheets = false;
     bool m_didCalculateResolver = false;
-    bool m_mayContainV0Shadow = false;
-
-    ShadowCascadeOrder m_shadowCascadeOrder = ShadowCascadeNone;
 
     Member<StyleResolver> m_resolver;
     StyleInvalidator m_styleInvalidator;