Daniel Holbert 912ec5051e Bug 1437623 part 2: (layout/base) Add missing includes/namespaces to preemptively fix unified bustage. r=mats
MozReview-Commit-ID: G4ufWWf9qRC

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extra : rebase_source : d7b814a8b9f5d3a6371eef14280598943a259c99
2018-02-13 09:08:42 -08:00
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