Increase Web Notification timeout to 20 seconds

chrome/browser/notifications/platform_notification_service_impl.cc

Index: chrome/browser/notifications/platform_notification_service_impl.cc
diff --git a/chrome/browser/notifications/platform_notification_service_impl.cc b/chrome/browser/notifications/platform_notification_service_impl.cc
index cc5d2ae8c664113065e24091f06c6ff9da1414e1..f30b74b17ff6986643c3e45a9bd40c8686cc49ba 100644
--- a/chrome/browser/notifications/platform_notification_service_impl.cc
+++ b/chrome/browser/notifications/platform_notification_service_impl.cc
@@ -387,6 +387,8 @@ Notification PlatformNotificationServiceImpl::CreateNotificationFromData(
 
   notification.set_buttons(buttons);
 
+  notification.set_is_web_notification(true);
+
   // On desktop, notifications with require_interaction==true stay on-screen
   // rather than minimizing to the notification center after a timeout.
   // On mobile, this is ignored (notifications are minimized at all times).