Yoshi Cheng-Hao Huang e17d60cbf4 Bug 1551810 - Part 1: return bool in CallbackTracer methods. r=jonco
Differential Revision: https://phabricator.services.mozilla.com/D38980

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extra : moz-landing-system : lando
2019-07-26 08:59:38 +00:00
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