libchrome: Switch to use base::Location, GetProgramCounter.

In r576279 uprev, tracked_objects::Location and
tracked_objects::GetProgramCounter were moved to base namespace.

BUG=chromium:909719
TEST=Built. Ran pre-CQ.

Cq-Depend: chromium:1660511
Change-Id: I65b6d66edf1e6359cd1f704fb964e8db26a03aa0
Reviewed-on: https://chromium-review.googlesource.com/c/weave/libweave/+/1659793
Reviewed-by: Keigo Oka <oka@chromium.org>
Tested-by: Hidehiko Abe <hidehiko@chromium.org>
Commit-Queue: Hidehiko Abe <hidehiko@chromium.org>
11 files changed