Revert of Calculate paint invalidation rect for scrollbars

third_party/WebKit/Source/core/layout/LayoutBox.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2006, 2007 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 861 matching lines @@
     LayoutObject* splitAnonymousBoxesAroundChild(LayoutObject* beforeChild);
 
     void addLayerHitTestRects(LayerHitTestRects&, const PaintLayer* currentCompositedLayer, const LayoutPoint& layerOffset, const LayoutRect& containerRect) const override;
     void computeSelfHitTestRects(Vector<LayoutRect>&, const LayoutPoint& layerOffset) const override;
 
     PaintInvalidationReason paintInvalidationReason(const LayoutBoxModelObject& paintInvalidationContainer,
         const LayoutRect& oldBounds, const LayoutPoint& oldPositionFromPaintInvalidationContainer,
         const LayoutRect& newBounds, const LayoutPoint& newPositionFromPaintInvalidationContainer) const override;
     void incrementallyInvalidatePaint(const LayoutBoxModelObject& paintInvalidationContainer, const LayoutRect& oldBounds, const LayoutRect& newBounds, const LayoutPoint& positionFromPaintInvalidationContainer) override;
 
-    PaintInvalidationReason invalidatePaintIfNeeded(PaintInvalidationState&, const LayoutBoxModelObject& paintInvalidationContainer) override;
+    void clearPaintInvalidationState(const PaintInvalidationState&) override;
+#if ENABLE(ASSERT)
+    bool paintInvalidationStateIsDirty() const override;
+#endif
+
+    PaintInvalidationReason invalidatePaintIfNeeded(PaintInvalidationState&, const LayoutBoxModelObject& newPaintInvalidationContainer) override;
 
     bool hasNonCompositedScrollbars() const final;
     void excludeScrollbars(LayoutRect&, OverlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize) const;
 
 private:
     bool mustInvalidateBackgroundOrBorderPaintOnHeightChange() const;
     bool mustInvalidateBackgroundOrBorderPaintOnWidthChange() const;
     inline bool mustInvalidateFillLayersPaintOnWidthChange(const FillLayer&) const;
 
     void invalidatePaintRectClippedByOldAndNewBounds(const LayoutBoxModelObject& paintInvalidationContainer, const LayoutRect&, const LayoutRect& oldBounds, const LayoutRect& newBounds);
@@ skipping 168 matching lines @@
         if (UNLIKELY(inlineBoxWrapper() != nullptr))
             deleteLineBoxWrapper();
     }
 
     ensureRareData().m_inlineBoxWrapper = boxWrapper;
 }
 
 } // namespace blink
 
 #endif // LayoutBox_h