Delete AuthorStyleInfo and move its data into ComputedStyle.RareNonInheritedData.

Source/core/style/StyleRareNonInheritedData.h

Index: Source/core/style/StyleRareNonInheritedData.h
diff --git a/Source/core/style/StyleRareNonInheritedData.h b/Source/core/style/StyleRareNonInheritedData.h
index 35728ef6ba515002fbec47969e70b24ec5c0caec..51be700b2755f3978be4e20ba72cc53efef5c62d 100644
--- a/Source/core/style/StyleRareNonInheritedData.h
+++ b/Source/core/style/StyleRareNonInheritedData.h
@@ -202,6 +202,10 @@ public:
     unsigned m_resize : 2; // EResize
     unsigned m_hasCompositorProxy : 1;
 
+    // Style adjustment for appearance is disabled when certain properties are set.
+    unsigned m_hasAuthorBackground : 1; // Whether there is a author-defined background.
+    unsigned m_hasAuthorBorder : 1; // Whether there is a author-defined border.
+
 private:
     StyleRareNonInheritedData();
     StyleRareNonInheritedData(const StyleRareNonInheritedData&);