[Extensions] Simplify EventFilteringInfo

extensions/browser/guest_view/extensions_guest_view_manager_delegate.cc

Index: extensions/browser/guest_view/extensions_guest_view_manager_delegate.cc
diff --git a/extensions/browser/guest_view/extensions_guest_view_manager_delegate.cc b/extensions/browser/guest_view/extensions_guest_view_manager_delegate.cc
index 061480b5acd6431aa9abb7e02c98ebe5e881d7f9..0199c3356074ff8d88682386cb1aa512e59a4c1f 100644
--- a/extensions/browser/guest_view/extensions_guest_view_manager_delegate.cc
+++ b/extensions/browser/guest_view/extensions_guest_view_manager_delegate.cc
@@ -43,7 +43,7 @@ void ExtensionsGuestViewManagerDelegate::DispatchEvent(
     GuestViewBase* guest,
     int instance_id) {
   EventFilteringInfo info;
-  info.SetInstanceID(instance_id);
+  info.instance_id = instance_id;
   std::unique_ptr<base::ListValue> event_args(new base::ListValue());
   event_args->Append(std::move(args));