merge_pr_18152
Source: https://github.com/tidoust/reffy-reports/blob/d24fdfa/whatwg/idl/picture-in-picture.idl Build: https://travis-ci.org/tidoust/reffy-reports/builds/565056840
Source: https://github.com/tidoust/reffy-reports/blob/d24fdfa/whatwg/idl/picture-in-picture.idl Build: https://travis-ci.org/tidoust/reffy-reports/builds/565056840