Dominik Schilling 113a9d4517 Language Upgrader: Re-use the automatic upgrader skin if the parent upgrader is using it.
Prevents broken Ajax responses when `Language_Pack_Upgrader::async_upgrade()` gets triggered during a shiny update.

Fixes #34048.
Built from https://develop.svn.wordpress.org/trunk@34748


git-svn-id: http://core.svn.wordpress.org/trunk@34713 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-10-01 20:25:26 +00:00
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2015-06-27 15:41:25 +00:00