Intersection Observer support for OOPIF

content/browser/frame_host/render_widget_host_view_child_frame.h

Index: content/browser/frame_host/render_widget_host_view_child_frame.h
diff --git a/content/browser/frame_host/render_widget_host_view_child_frame.h b/content/browser/frame_host/render_widget_host_view_child_frame.h
index 9af289d782d4706a25a8ac21a7fbc264875fc34d..69b36538a8f65c57e5493567ece913446340635d 100644
--- a/content/browser/frame_host/render_widget_host_view_child_frame.h
+++ b/content/browser/frame_host/render_widget_host_view_child_frame.h
@@ -194,6 +194,9 @@ class CONTENT_EXPORT RenderWidgetHostViewChildFrame
   void RegisterFrameSinkId();
   void UnregisterFrameSinkId();
 
+  void UpdateViewportIntersection(const gfx::Rect& viewport_intersection,
+                                  const gfx::Point& root_offset);
+
  protected:
   friend class RenderWidgetHostView;
   friend class RenderWidgetHostViewChildFrameTest;