IntersectionObserver: second cut.

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 727 matching lines @@
     void collectAnnotatedRegions(LayoutObject&, Vector<AnnotatedRegionValue>&) const;
 
     typedef WTF::HashMap <const GraphicsLayer*, Vector<std::pair<int64_t, WebRect>>> GraphicsLayerFrameTimingRequests;
     void updateFrameTimingRequestsIfNeeded();
     void collectFrameTimingRequests(GraphicsLayerFrameTimingRequests&);
     void collectFrameTimingRequestsRecursive(GraphicsLayerFrameTimingRequests&);
 
     template <typename Function> void forAllNonThrottledFrameViews(Function);
 
     void setNeedsUpdateViewportIntersection();
-    void updateViewportIntersectionsForSubtree();
+    void updateViewportIntersectionsForSubtree(LifeCycleUpdateOption);
     void updateViewportIntersectionIfNeeded();
-    void notifyIntersectionObservers();
+    void notifyRenderThrottlingObservers();
 
     // PaintInvalidationCapableScrollableArea
     LayoutBox& boxForScrollControlPaintInvalidation() const override;
     LayoutScrollbarPart* resizer() const override { return nullptr; }
 
     LayoutSize m_size;
 
     typedef HashSet<RefPtr<LayoutEmbeddedObject>> EmbeddedObjectSet;
     EmbeddedObjectSet m_partUpdateSet;
 
@@ skipping 18 matching lines @@
     bool m_hasPendingLayout;
     LayoutSubtreeRootList m_layoutSubtreeRootList;
 
     bool m_layoutSchedulingEnabled;
     bool m_inPerformLayout;
     bool m_inSynchronousPostLayout;
     int m_layoutCount;
     unsigned m_nestedLayoutCount;
     Timer<FrameView> m_postLayoutTasksTimer;
     Timer<FrameView> m_updateWidgetsTimer;
-    OwnPtr<CancellableTaskFactory> m_intersectionObserverNotificationFactory;
+    OwnPtr<CancellableTaskFactory> m_renderThrottlingObserverNotificationFactory;
 
     bool m_firstLayout;
     bool m_isTransparent;
     Color m_baseBackgroundColor;
     IntSize m_lastViewportSize;
     float m_lastZoomFactor;
 
     AtomicString m_mediaType;
     AtomicString m_mediaTypeWhenNotPrinting;
 
@@ skipping 117 matching lines @@
     static const unsigned visualPixelThreshold = 32 * 32;
     if (m_visuallyNonEmptyPixelCount > visualPixelThreshold)
         setIsVisuallyNonEmpty();
 }
 
 DEFINE_TYPE_CASTS(FrameView, Widget, widget, widget->isFrameView(), widget.isFrameView());
 
 } // namespace blink
 
 #endif // FrameView_h