GitLab

Original: https://chromium-review.googlesource.com/c/chromium/src/+/782704
Revert:   https://chromium-review.googlesource.com/c/chromium/src/+/797934

Cast Audio Linux bots doesn't have |enable_webrtc| defined. So the two new
files shouldn't be added there in BUILD.gn as in original cl, but together
with "web_contents_video_capture_device.*"

TBR=avi@chromium.org,zijiehe@chromium.org

BUG: 699201
Change-Id: I4df15c66d44d40f3379c5e2333d96f8b2b97c065
Reviewed-on: https://chromium-review.googlesource.com/798311Reviewed-by: Weiyong Yao <braveyao@chromium.org>
Commit-Queue: Weiyong Yao <braveyao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#520392}