Summary:
This brings RN up to date with https://github.com/facebook/react/pull/7472 (scheduled for React 15.3.1).
If you use React 15.3.1 with RN without this patch, Systrace output will lack the reconciler events.
(Since it’s a niche feature it didn’t seem to me that full backward compat is necessary so I just removed old hooks. This won’t cause crashes—it’s just you won’t get events in Systrace if you use new React but old RN.)
Closes https://github.com/facebook/react-native/pull/9383
Differential Revision: D3738463
Pulled By: spicyj
fbshipit-source-id: 791cdbc5558666a101fa403f4e7852f700038fc9
1aef7e4629