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 7453b3a40cd57f92460bb7a22dc65eb6d7fd0e8a..f0093c9ea9a71584669c177de1fa883b3da5ee59 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) {