Revert of ResizeObserver pt6: integration

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2006, 2007 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 1055 matching lines @@
     {
         if (!m_rareData)
             m_rareData = wrapUnique(new LayoutBoxRareData());
         return *m_rareData.get();
     }
 
     bool logicalHeightComputesAsNone(SizeType) const;
 
     bool isBox() const = delete; // This will catch anyone doing an unnecessary check.
 
-    void frameRectChanged();
+    void frameRectChanged()
+    {
+        // The frame rect may change because of layout of other objects.
+        // Should check this object for paint invalidation.
+        if (!needsLayout())
+            setMayNeedPaintInvalidation();
+    }
 
     virtual bool isInSelfHitTestingPhase(HitTestAction hitTestAction) const { return hitTestAction == HitTestForeground; }
 
     void updateBackgroundAttachmentFixedStatusAfterStyleChange();
 
     // The CSS border box rect for this box.
     //
     // The rectangle is in this box's physical coordinates but with a
     // flipped block-flow direction (see the COORDINATE SYSTEMS section
     // in LayoutBoxModelObject). The location is the distance from this
@@ skipping 124 matching lines @@
         || breakValue == BreakLeft
         || breakValue == BreakPage
         || breakValue == BreakRecto
         || breakValue == BreakRight
         || breakValue == BreakVerso;
 }
 
 } // namespace blink
 
 #endif // LayoutBox_h