This patch converts datetimebox.xml to datetimebox.js and loads it as a UA Widget,
while touches things here and there to make it work.
In HTMLInputElement manages the lifecycle of the datetimebox UA Widget.
It is loaded when in <input> has type date or time, or have its type switch to date or time.
nsDateTimeControlFrame is changed so that when UA Widget is enabled,
it would not generate <xul:datetimebox>.
Like bug 1483972, a check is added in nsCSSFrameConstructor::CreateGeneratedContentItem()
to make sure we don't generate pseudo content inside <input>.
Assertions in IntlUtils is changed to allow UAWidget to call the methods.
Depends on D9056
Differential Revision: https://phabricator.services.mozilla.com/D9057
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rename : toolkit/content/widgets/datetimebox.xml => toolkit/content/widgets/datetimebox.js
extra : moz-landing-system : lando
These were detected by the script used to generate part 2.
MozReview-Commit-ID: VMcT154f6f
--HG--
extra : rebase_source : 2f5fc8a314302fcacac840a8dbe0ff874d518e51
Simon Giesecke
Emilio Cobos Álvarez
Sylvestre Ledru
Timothy Guan-tin Chien
Jan de Mooij
Jeff Gilbert
Jonathan Watt
Andrew McCreight
Jessica Jong