GitLab

Replace usages of java_files with sources in above directory's gn files,
and automatically format.

TBR=jbudorick@chromium.org,pshmakov@chromium.org

Bug: 1035074
Change-Id: I3423d3481c2baaaa7ccc1724051bdd30f5fb5dae
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1980899Reviewed-by: Natalie Chouinard <chouinard@chromium.org>
Commit-Queue: Natalie Chouinard <chouinard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#727230}