Pete Bacon Darwin bc7cde0f01 fix(core): ensure that ngI18nClosureMode is guarded (#34211)
If the `ngI18nClosureMode` global check actually makes it
through to the runtime, then checks for its existence should
be guarded to prevent `Reference undefined` errors in strict
mode.

(Normally, it is stripped out by dead code elimination during
build optimization.)

PR Close #34211
2019-12-03 16:18:12 -08:00
..