Delete AuthorStyleInfo and move its data into ComputedStyle.RareNonInheritedData.

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 e8f1dd447b7c3da63b8cea7aa1f136bd3b89779c..5e63debe538edab0e6f521447eca6424bab94979 100644
--- a/Source/core/style/ComputedStyle.h
+++ b/Source/core/style/ComputedStyle.h
@@ -1565,6 +1565,11 @@ public:
     bool borderObscuresBackground() const;
     void getBorderEdgeInfo(BorderEdge edges[], bool includeLogicalLeftEdge = true, bool includeLogicalRightEdge = true) const;
 
+    void setHasAuthorBackground(bool authorBackground) { SET_VAR(rareNonInheritedData, m_hasAuthorBackground, authorBackground); }
+    void setHasAuthorBorder(bool authorBorder) { SET_VAR(rareNonInheritedData, m_hasAuthorBorder, authorBorder); }
+    bool hasAuthorBackground() const { return rareNonInheritedData->m_hasAuthorBackground; };
+    bool hasAuthorBorder() const { return rareNonInheritedData->m_hasAuthorBorder; };
+
     // Initial values for all the properties
     static EBorderCollapse initialBorderCollapse() { return BSEPARATE; }
     static EBorderStyle initialBorderStyle() { return BNONE; }