When a filter or action hook is deprecated, the corresponding `apply_filters()`
or `do_action()` calls should be switched out with `apply_filters_deprecated()`
or `do_action_deprecated()`. The latter functions will throw a deprecation
before invoking the original hook.
Props solarissmoke, SergeyBiryukov, DrewAPicture.
Fixes#10441.
git-svn-id: https://develop.svn.wordpress.org/trunk@37861 602fd350-edb4-49c9-b593-d223f7449a82