Handle nested position:sticky elements

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 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 132 matching lines @@
   LayoutUnit marginAfter(const ComputedStyle* otherStyle = nullptr) const final;
   LayoutUnit marginStart(const ComputedStyle* otherStyle = nullptr) const final;
   LayoutUnit marginEnd(const ComputedStyle* otherStyle = nullptr) const final;
   LayoutUnit marginOver() const final;
   LayoutUnit marginUnder() const final;
 
   void absoluteRects(Vector<IntRect>&,
                      const LayoutPoint& accumulatedOffset) const final;
   FloatRect localBoundingBoxRectForAccessibility() const final;
 
-  LayoutSize offsetFromContainer(const LayoutObject*) const final;
+  LayoutSize offsetFromContainer(const LayoutObject*,
+                                 bool ignoreSticky = false) const final;
 
   LayoutRect linesBoundingBox() const;
   LayoutRect visualOverflowRect() const final;
 
   InlineFlowBox* createAndAppendInlineFlowBox();
 
   void dirtyLineBoxes(bool fullLayout);
 
   LineBoxList* lineBoxes() { return &m_lineBoxes; }
   const LineBoxList* lineBoxes() const { return &m_lineBoxes; }
@@ skipping 182 matching lines @@
   // All of the line boxes created for this inline flow. For example,
   // <i>Hello<br>world.</i> will have two <i> line boxes.
   LineBoxList m_lineBoxes;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutInline, isLayoutInline());
 
 }  // namespace blink
 
 #endif  // LayoutInline_h