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svn:author
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kai
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svn:date
V 27
2019-06-02T19:50:16.976104Z
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svn:log
V 470
devel/gn: Update to 1592

Changelog:

Minor fixes to tracing

The chrome://tracing expects the timestamp to be in microseconds, but
it had been stored in the TraceItem in nanoseconds, so this fixes it.

Also adds quotes around the thread_id, since on Mac it is written in hex
format and so the JSON parser doesn't recognize it.

Finally, adds toolchain information to the import traces.

PR:		238241
Submitted by:	Oleh Hushchenkov <o.hushchenkov@gmail.com> (maintainer)

END