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 d5500ab4e95c82e5e070257fe31daa32549e2884..717085648f293f9fec82a9ca23f4fefb27b21edb 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
@@ -328,6 +328,11 @@ 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) {