[1] [whatwg] Forcing orientation in content ( (2013-09-10 23:02:32 +09:00 版)) http://lists.whatwg.org/pipermail/whatwg-whatwg.org/2013-September/040758.html

[2] [whatwg] Forcing orientation in content ( (2013-07-13 12:26:29 +09:00 版)) http://lists.whatwg.org/pipermail/whatwg-whatwg.org/2013-July/040060.html