Propagate inert state to OOPIFs when a modal dialog is active

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 b979394f565d7b93020fd3e2f94cbce8a0ddb9a9..101098daf65d5d78b997a77657fa8aeddbf64b42 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
@@ -378,6 +378,11 @@ void RenderWidgetHostViewChildFrame::UpdateViewportIntersection(
                                                     viewport_intersection));
 }
 
+void RenderWidgetHostViewChildFrame::SetIsInert(bool inert) {
+  if (host_)
+    host_->Send(new ViewMsg_SetIsInert(host_->GetRoutingID(), inert));
+}
+
 void RenderWidgetHostViewChildFrame::GestureEventAck(
     const blink::WebGestureEvent& event,
     InputEventAckState ack_result) {