Intersection Observer support for OOPIF

content/browser/frame_host/cross_process_frame_connector.cc

Index: content/browser/frame_host/cross_process_frame_connector.cc
diff --git a/content/browser/frame_host/cross_process_frame_connector.cc b/content/browser/frame_host/cross_process_frame_connector.cc
index d6fd0f756c171a7556cf56081cb417660731d464..f1eb10f819d3e1bc3d96e2ae7b52b68c606c477d 100644
--- a/content/browser/frame_host/cross_process_frame_connector.cc
+++ b/content/browser/frame_host/cross_process_frame_connector.cc
@@ -42,6 +42,8 @@ bool CrossProcessFrameConnector::OnMessageReceived(const IPC::Message& msg) {
   IPC_BEGIN_MESSAGE_MAP(CrossProcessFrameConnector, msg)
     IPC_MESSAGE_HANDLER(FrameHostMsg_ForwardInputEvent, OnForwardInputEvent)
     IPC_MESSAGE_HANDLER(FrameHostMsg_FrameRectChanged, OnFrameRectChanged)
+    IPC_MESSAGE_HANDLER(FrameHostMsg_UpdateViewportIntersection,
+                        OnUpdateViewportIntersection)
     IPC_MESSAGE_HANDLER(FrameHostMsg_VisibilityChanged, OnVisibilityChanged)
     IPC_MESSAGE_HANDLER(FrameHostMsg_SatisfySequence, OnSatisfySequence)
     IPC_MESSAGE_HANDLER(FrameHostMsg_RequireSequence, OnRequireSequence)
@@ -297,6 +299,12 @@ void CrossProcessFrameConnector::OnFrameRectChanged(
     SetRect(frame_rect);
 }
 
+void CrossProcessFrameConnector::OnUpdateViewportIntersection(
+    const gfx::Rect& viewport_intersection) {
+  if (view_)
+    view_->UpdateViewportIntersection(viewport_intersection);
+}
+
 void CrossProcessFrameConnector::OnVisibilityChanged(bool visible) {
   if (!view_)
     return;