Include the outline into the visual overflow

Source/core/rendering/RenderObject.h

Index: Source/core/rendering/RenderObject.h
diff --git a/Source/core/rendering/RenderObject.h b/Source/core/rendering/RenderObject.h
index 399c0380079a52efb44ec07c23aca9afcdf972da..90838a2025c005074d508e25b7e60a3f2a9d2370 100644
--- a/Source/core/rendering/RenderObject.h
+++ b/Source/core/rendering/RenderObject.h
@@ -849,9 +849,6 @@ public:
 
     bool hasReflection() const { return m_bitfields.hasReflection(); }
 
-    // Applied as a "slop" to dirty rect checks during the outline painting phase's dirty-rect checks.
-    int maximalOutlineSize(PaintPhase) const;
-
     enum SelectionState {
         SelectionNone, // The object is not selected.
         SelectionStart, // The object either contains the start of a selection run or is the start of a run