Intersection Observer support for OOPIF

content/renderer/render_frame_proxy.h

Index: content/renderer/render_frame_proxy.h
diff --git a/content/renderer/render_frame_proxy.h b/content/renderer/render_frame_proxy.h
index 8aa49eab19a0a71803c71d559006f06d0d2979b9..9dc47061a4e32b087a72e2301bf80311e5934f35 100644
--- a/content/renderer/render_frame_proxy.h
+++ b/content/renderer/render_frame_proxy.h
@@ -21,6 +21,7 @@ struct FrameMsg_CompositorFrameSwapped_Params;
 
 namespace blink {
 class WebInputEvent;
+struct WebPoint;
 struct WebRect;
 }
 
@@ -135,6 +136,9 @@ class CONTENT_EXPORT RenderFrameProxy
                 bool should_replace_current_entry) override;
   void forwardInputEvent(const blink::WebInputEvent* event) override;
   void frameRectsChanged(const blink::WebRect& frame_rect) override;
+  void updateRemoteViewportIntersection(
+      const blink::WebRect& viewportIntersection,
+      const blink::WebPoint& rootOffset) override;
   void visibilityChanged(bool visible) override;
   void didChangeOpener(blink::WebFrame* opener) override;
   void advanceFocus(blink::WebFocusType type,