No code changes, only code moves here.
Move all code that locks pp.timersLock into time.go
so that it is all in one place, for easier abstraction.
[This is one CL in a refactoring stack making very small changes
in each step, so that any subtle bugs that we miss can be more
easily pinpointed to a small change.]
Change-Id: I1b59af7780431ec6479440534579deb1a3d9d7a3
Reviewed-on: https://go-review.googlesource.com/c/go/+/564117 Reviewed-by: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>