Summary:
See "D3291793 Symbolicate JS stacktrace using RN Packager" for the background
of why this matters. TLDR - saving tons of memory by moving symbolication from
JSC into server and cleaning up old hacks.
Before this change: a redbox causes +73MB JSC size
{F60869250}
{F60869249}
After this change: a redbox causes +1MB JSC size
{F61005061}
{F61005062}
Next step – replace JS implementation by native to show better progress and
clean up even more old APIs (ExceptionsManager.updateExceptionMessage).
Reviewed By: davidaurelio
Differential Revision: D3319151
fbshipit-source-id: 48ff4df27642ea4e1bc2414f48a8dd4d32adee50
946ec48a07