Commit 137b6f36 authored by Elliott Hughes's avatar Elliott Hughes
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popen: stop using _fwalk. 

We don't need this now that popen always uses O_CLOEXEC, and it's unsafe
because _fwalk takes a lock. (In <= P, the equivalent code walked the
list without a lock in the child.)

Bug: http://b/129156634
Test: ran tests
Change-Id: Ic9cee7eb59cfc9397f370d1dc47ea3d3326179ca
parent e187d920
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