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 0711a327651df1c961f5a3508fb1bf795e1ac0d5..c93c3393f0004e0e8e4340c93d3e5232f00024de 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;