GitLab

This is a resubmission of https://codereview.chromium.org/1611533002/.
That CL was reverted because it caused Android build bot failures. Since
then, I submitted https://codereview.chromium.org/1611353003/, which
prevents battor_agent from being built on Android (and Chromecast).

This tool will also be used by the Chromium trace controller to find
any connected BattOrs.

TBR=zhenw@chromium.org,sky@chromium.org
BUG=542837

Review URL: https://codereview.chromium.org/1631313002

Cr-Commit-Position: refs/heads/master@{#371543}