GitLab

Adds option to choose to use device or host files. The combined reports
functionality has been moved to code_coverage generation in the
tools/build repo.

Won't land until after verifying the bot script is working as expected
in:
https://chromium-review.googlesource.com/c/chromium/tools/build/+/2348094

Bug: 1107004
Change-Id: I628217c9249a0d69c3ec7d82c63aefd59087d6ad
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2353367Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Reviewed-by: Yuke Liao <liaoyuke@chromium.org>
Commit-Queue: benjamin joyce <bjoyce@chromium.org>
Cr-Commit-Position: refs/heads/master@{#797825}