Intersection Observer support for OOPIF

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2006 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 96 matching lines @@
 
   int viewLogicalWidth(IncludeScrollbarsInRect = ExcludeScrollbars) const;
   int viewLogicalHeight(IncludeScrollbarsInRect = ExcludeScrollbars) const;
 
   LayoutUnit viewLogicalHeightForPercentages() const;
 
   float zoomFactor() const;
 
   FrameView* frameView() const { return m_frameView; }
 
+  // |ancestor| can be nullptr, which will map the rect to the main frame's
+  // space, even if the main frame is remote (or has intermediate remote
+  // frames in the chain).
   bool mapToVisualRectInAncestorSpace(const LayoutBoxModelObject* ancestor,
                                       LayoutRect&,
                                       MapCoordinatesFlags,
                                       VisualRectFlags) const;
   bool mapToVisualRectInAncestorSpace(
       const LayoutBoxModelObject* ancestor,
       LayoutRect&,
       VisualRectFlags = DefaultVisualRectFlags) const override;
   LayoutSize offsetForFixedPosition(bool includePendingScroll = false) const;
 
@@ skipping 183 matching lines @@
   unsigned m_hitTestCount;
   unsigned m_hitTestCacheHits;
   Persistent<HitTestCache> m_hitTestCache;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutView, isLayoutView());
 
 }  // namespace blink
 
 #endif  // LayoutView_h