Revert of 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 6254c4266dd60fca7a51c738a7e6029a407104a9..dcaba3799d9cd350b768467b630688f4c6a187b9 100644
--- a/Source/core/style/ComputedStyle.h
+++ b/Source/core/style/ComputedStyle.h
@@ -1563,11 +1563,6 @@
 
     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; }