Remove unused lambda capture This is a preparation CL to remove -Wno-unused-lambda-capture warning suppression. Bug: chromium:681136 Change-Id: Ib5c1c4eeeed3b7406ede2dea33066c54e5fc3da0 Reviewed-on: https://chromium-review.googlesource.com/c/1286172 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>