Check rect under-invalidations

third_party/WebKit/Source/core/frame/FrameView.h

 /*
    Copyright (C) 1997 Martin Jones (mjones@kde.org)
              (C) 1998 Waldo Bastian (bastian@kde.org)
              (C) 1998, 1999 Torben Weis (weis@kde.org)
              (C) 1999 Lars Knoll (knoll@kde.org)
              (C) 1999 Antti Koivisto (koivisto@kde.org)
    Copyright (C) 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
@@ skipping 304 matching lines @@
 
     bool shouldSuspendScrollAnimations() const override;
     void scrollbarStyleChanged() override;
 
     LayoutReplaced* embeddedReplacedContent() const;
 
     static void setInitialTracksPaintInvalidationsForTesting(bool);
 
     void setTracksPaintInvalidations(bool);
     bool isTrackingPaintInvalidations() const { return m_isTrackingPaintInvalidations; }
-    void resetTrackedPaintInvalidations();
 
     using ScrollableAreaSet = HeapHashSet<Member<ScrollableArea>>;
     void addScrollableArea(ScrollableArea*);
     void removeScrollableArea(ScrollableArea*);
     const ScrollableAreaSet* scrollableAreas() const { return m_scrollableAreas.get(); }
 
     void addAnimatingScrollableArea(ScrollableArea*);
     void removeAnimatingScrollableArea(ScrollableArea*);
     const ScrollableAreaSet* animatingScrollableAreas() const { return m_animatingScrollableAreas.get(); }
 
@@ skipping 605 matching lines @@
     if (m_visuallyNonEmptyPixelCount > visualPixelThreshold)
         setIsVisuallyNonEmpty();
 }
 
 DEFINE_TYPE_CASTS(FrameView, Widget, widget, widget->isFrameView(), widget.isFrameView());
 DEFINE_TYPE_CASTS(FrameView, ScrollableArea, scrollableArea, scrollableArea->isFrameView(), scrollableArea.isFrameView());
 
 } // namespace blink
 
 #endif // FrameView_h