[1] Use USVString for all URLs ( (domenic著, 2016-05-20 22:02:29 +09:00)) https://github.com/whatwg/html/commit/018b983b77b2cd908f6d00100e7e0abe893dd2c3

[2] Remove registerContentHandler() and several friends (annevk著, 2017-09-14 20:16:09 +09:00) https://github.com/whatwg/html/commit/b143dbc2d16f3473fcadee377d838070718549d3