Intersection Observer support for OOPIF

content/browser/frame_host/render_widget_host_view_child_frame.cc

Index: content/browser/frame_host/render_widget_host_view_child_frame.cc
diff --git a/content/browser/frame_host/render_widget_host_view_child_frame.cc b/content/browser/frame_host/render_widget_host_view_child_frame.cc
index 34e4b33c0da4395a1c069598aa63d941fd9c4f70..bf7d12e33523470e6138b519d82a80a8b966cc9d 100644
--- a/content/browser/frame_host/render_widget_host_view_child_frame.cc
+++ b/content/browser/frame_host/render_widget_host_view_child_frame.cc
@@ -338,6 +338,13 @@ void RenderWidgetHostViewChildFrame::UnregisterFrameSinkId() {
   }
 }
 
+void RenderWidgetHostViewChildFrame::UpdateViewportIntersection(
+    const gfx::Rect& viewport_intersection) {
+  if (host_)
+    host_->Send(new ViewMsg_SetViewportIntersection(host_->GetRoutingID(),
+                                                    viewport_intersection));
+}
+
 void RenderWidgetHostViewChildFrame::GestureEventAck(
     const blink::WebGestureEvent& event,
     InputEventAckState ack_result) {