Update metrics dependency to use slotted libmetrics library.

BUG=chromium:342866
CQ-DEPEND=CL:185187
CQ-DEPEND=CL:186026
TEST=Trybot run on paladin, release, and chromiumos-sdk builders.

Change-Id: I3dde56f13b0ac34d959f44746e37701facbdd580
Reviewed-on: https://chromium-review.googlesource.com/186029
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Ben Chan <benchan@chromium.org>
Commit-Queue: Ben Chan <benchan@chromium.org>
1 file changed