Move collapseAnonymousBlockChild() to LayoutBlockFlow, and make it non-static.

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

 /*
  * This file is part of the layout object implementation for KHTML.
  *
  * Copyright (C) 2003 Apple Computer, Inc.
  *
  * 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 26 matching lines @@
     const char* name() const override { return "LayoutDeprecatedFlexibleBox"; }
 
     void styleWillChange(StyleDifference, const ComputedStyle& newStyle) override;
 
     void layoutBlock(bool relayoutChildren) override;
     void layoutHorizontalBox(bool relayoutChildren);
     void layoutVerticalBox(bool relayoutChildren);
 
     bool isDeprecatedFlexibleBox() const override { return true; }
     bool isStretchingChildren() const { return m_stretchingChildren; }
-    bool canCollapseAnonymousBlockChild() const override { return false; }
 
     void placeChild(LayoutBox* child, const LayoutPoint& location);
 
 private:
     void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const override;
 
     LayoutUnit allowedChildFlex(LayoutBox* child, bool expanding, unsigned group);
 
     bool hasMultipleLines() const { return style()->boxLines() == MULTIPLE; }
     bool isVertical() const { return style()->boxOrient() == VERTICAL; }
     bool isHorizontal() const { return style()->boxOrient() == HORIZONTAL; }
 
     void applyLineClamp(FlexBoxIterator&, bool relayoutChildren);
     void clearLineClamp();
 
     bool m_stretchingChildren;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutDeprecatedFlexibleBox, isDeprecatedFlexibleBox());
 
 } // namespace blink
 
 #endif // LayoutDeprecatedFlexibleBox_h