Remove LayoutBlockFlow overflow invalidation

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2003-2013 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
@@ skipping 270 matching lines @@
     bool positionNewFloats(LineWidth* = nullptr);
 
     LayoutUnit nextFloatLogicalBottomBelow(LayoutUnit) const;
     LayoutUnit nextFloatLogicalBottomBelowForBlock(LayoutUnit) const;
 
     FloatingObject* lastFloatFromPreviousLine() const
     {
         return containsFloats() ? m_floatingObjects->set().last().get() : nullptr;
     }
 
-    void invalidateDisplayItemClientsOfFirstLine();
+    void setShouldDoFullPaintInvalidationForFirstLine();
 
     void simplifiedNormalFlowInlineLayout();
     bool recalcInlineChildrenOverflowAfterStyleChange();
 
     PositionWithAffinity positionForPoint(const LayoutPoint&) override;
 
     LayoutUnit lowestFloatLogicalBottom(FloatingObject::Type = FloatingObject::FloatLeftRight) const;
 
 #ifndef NDEBUG
     void showLineTreeAndMark(const InlineBox* = nullptr, const char* = nullptr, const InlineBox* = nullptr, const char* = nullptr, const LayoutObject* = nullptr) const;
 #endif
 
 protected:
     void rebuildFloatsFromIntruding();
-    void layoutInlineChildren(bool relayoutChildren, LayoutUnit& paintInvalidationLogicalTop, LayoutUnit& paintInvalidationLogicalBottom, LayoutUnit afterEdge);
+    void layoutInlineChildren(bool relayoutChildren, LayoutUnit afterEdge);
     void addLowestFloatFromChildren(LayoutBlockFlow*);
 
     void createFloatingObjects();
 
     void willBeDestroyed() override;
     void styleWillChange(StyleDifference, const ComputedStyle& newStyle) override;
     void styleDidChange(StyleDifference, const ComputedStyle* oldStyle) override;
 
     void updateBlockChildDirtyBitsBeforeLayout(bool relayoutChildren, LayoutBox&);
 
@@ skipping 55 matching lines @@
 
     bool hasOverhangingFloats() { return parent() && containsFloats() && lowestFloatLogicalBottom() > logicalHeight(); }
     bool hasOverhangingFloat(LayoutBox*);
     void addIntrudingFloats(LayoutBlockFlow* prev, LayoutUnit xoffset, LayoutUnit yoffset);
     void addOverhangingFloats(LayoutBlockFlow* child, bool makeChildPaintOtherFloats);
     bool isOverhangingFloat(const FloatingObject& floatObject) const { return logicalBottomForFloat(floatObject) > logicalHeight(); }
 
     bool hitTestFloats(HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset);
 
     void invalidatePaintForOverhangingFloats(bool paintAllDescendants) final;
-    void invalidatePaintForOverflow() final;
     void invalidateDisplayItemClients(PaintInvalidationReason) const override;
 
     void clearFloats(EClear);
 
     LayoutUnit logicalRightFloatOffsetForLine(LayoutUnit logicalTop, LayoutUnit fixedOffset, LayoutUnit logicalHeight) const;
     LayoutUnit logicalLeftFloatOffsetForLine(LayoutUnit logicalTop, LayoutUnit fixedOffset, LayoutUnit logicalHeight) const;
 
     LayoutUnit logicalRightOffsetForPositioningFloat(LayoutUnit logicalTop, LayoutUnit fixedOffset, LayoutUnit* heightRemaining) const;
     LayoutUnit logicalLeftOffsetForPositioningFloat(LayoutUnit logicalTop, LayoutUnit fixedOffset, LayoutUnit* heightRemaining) const;
 
@@ skipping 209 matching lines @@
     // If the child is unsplittable and can't fit on the current page, return the top of the next page/column.
     LayoutUnit adjustForUnsplittableChild(LayoutBox&, LayoutUnit logicalOffset) const;
 
     // Used to store state between styleWillChange and styleDidChange
     static bool s_canPropagateFloatIntoSibling;
 
     LineBoxList m_lineBoxes; // All of the root line boxes created for this block flow.  For example, <div>Hello<br>world.</div> will have two total lines for the <div>.
 
     LayoutBlockFlowRareData& ensureRareData();
 
-    LayoutUnit m_paintInvalidationLogicalTop;
-    LayoutUnit m_paintInvalidationLogicalBottom;
-
     bool isSelfCollapsingBlock() const override;
     bool checkIfIsSelfCollapsingBlock() const;
 
 protected:
     std::unique_ptr<LayoutBlockFlowRareData> m_rareData;
     std::unique_ptr<FloatingObjects> m_floatingObjects;
 
     friend class MarginInfo;
     friend class LineWidth; // needs to know FloatingObject
 
@@ skipping 38 matching lines @@
 
 // END METHODS DEFINED IN LayoutBlockFlowLine
 
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutBlockFlow, isLayoutBlockFlow());
 
 } // namespace blink
 
 #endif // LayoutBlockFlow_h