GitLab

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

TBR=dpranke@chromium.org

Bug: 1035074
Change-Id: I1ac9d292b68955a38757cf90f57631ff260b388a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1980893Reviewed-by: Natalie Chouinard <chouinard@chromium.org>
Commit-Queue: Natalie Chouinard <chouinard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#727204}