Remove multicol special-cases from invalidation and the pre-paint tree walk

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

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef LayoutMultiColumnSpannerPlaceholder_h
 #define LayoutMultiColumnSpannerPlaceholder_h
 
 #include "core/layout/LayoutBlockFlow.h"
 
 namespace blink {
@@ skipping 41 matching lines @@
  protected:
   void insertedIntoTree() override;
   void willBeRemovedFromTree() override;
   bool needsPreferredWidthsRecalculation() const override;
   LayoutUnit minPreferredLogicalWidth() const override;
   LayoutUnit maxPreferredLogicalWidth() const override;
   void layout() override;
   void computeLogicalHeight(LayoutUnit logicalHeight,
                             LayoutUnit logicalTop,
                             LogicalExtentComputedValues&) const override;
-  void invalidatePaintOfSubtreesIfNeeded(
-      const PaintInvalidationState&) override;
   void paint(const PaintInfo&, const LayoutPoint& paintOffset) const override;
   bool nodeAtPoint(HitTestResult&,
                    const HitTestLocation& locationInContainer,
                    const LayoutPoint& accumulatedOffset,
                    HitTestAction) override;
 
  private:
   LayoutMultiColumnSpannerPlaceholder(LayoutBox*);
 
   // The actual column-span:all layoutObject inside the flow thread.
   LayoutBox* m_layoutObjectInFlowThread;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutMultiColumnSpannerPlaceholder,
                                 isLayoutMultiColumnSpannerPlaceholder());
 
 }  // namespace blink
 
 #endif