Intersection Observer support for OOPIF

content/renderer/render_widget.cc

Index: content/renderer/render_widget.cc
diff --git a/content/renderer/render_widget.cc b/content/renderer/render_widget.cc
index e47f7f661395de1b053f167b9ce502f19915730a..1eee23423d6dcb56acc92a680dc45833fae2660a 100644
--- a/content/renderer/render_widget.cc
+++ b/content/renderer/render_widget.cc
@@ -616,6 +616,8 @@ bool RenderWidget::OnMessageReceived(const IPC::Message& message) {
     IPC_MESSAGE_HANDLER(ViewMsg_SetTextDirection, OnSetTextDirection)
     IPC_MESSAGE_HANDLER(ViewMsg_Move_ACK, OnRequestMoveAck)
     IPC_MESSAGE_HANDLER(ViewMsg_UpdateScreenRects, OnUpdateScreenRects)
+    IPC_MESSAGE_HANDLER(ViewMsg_SetViewportIntersection,
+                        OnSetViewportIntersection)
     IPC_MESSAGE_HANDLER(ViewMsg_WaitForNextFrameForTests,
                         OnWaitNextFrameForTests)
     IPC_MESSAGE_HANDLER(InputMsg_RequestCompositionUpdate,
@@ -1634,6 +1636,12 @@ void RenderWidget::OnUpdateWindowScreenRect(
     window_screen_rect_ = window_screen_rect;
 }
 
+void RenderWidget::OnSetViewportIntersection(
+    const gfx::Rect& viewport_intersection) {
+  if (GetWebWidget())
+    GetWebWidget()->setRemoteViewportIntersection(viewport_intersection);
+}
+
 void RenderWidget::OnHandleCompositorProto(const std::vector<uint8_t>& proto) {
   if (compositor_)
     compositor_->OnHandleCompositorProto(proto);