IntersectionObserver: second cut.

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

Index: third_party/WebKit/Source/core/frame/FrameView.h
diff --git a/third_party/WebKit/Source/core/frame/FrameView.h b/third_party/WebKit/Source/core/frame/FrameView.h
index 9152342e4417194c0267b7923ebe7683732647ef..2938b125323d7901147af08e41c19daa7a8f6767 100644
--- a/third_party/WebKit/Source/core/frame/FrameView.h
+++ b/third_party/WebKit/Source/core/frame/FrameView.h
@@ -748,9 +748,9 @@ private:
     template <typename Function> void forAllNonThrottledFrameViews(Function);
 
     void setNeedsUpdateViewportIntersection();
-    void updateViewportIntersectionsForSubtree();
+    void updateViewportIntersectionsForSubtree(LifeCycleUpdateOption);
     void updateViewportIntersectionIfNeeded();
-    void notifyIntersectionObservers();
+    void notifyRenderThrottlingObservers();
 
     // PaintInvalidationCapableScrollableArea
     LayoutBox& boxForScrollControlPaintInvalidation() const override;
@@ -789,7 +789,7 @@ private:
     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;