R=iannucci, sokcevic, yuanjunh Bug: 1449933 Change-Id: I863c55f5a12da103b4167c8cf9a1aac02962838f Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/4602126 Reviewed-by: Yuanjun Huang <yuanjunh@google.com> Reviewed-by: Robbie Iannucci <iannucci@chromium.org> Commit-Queue: Yiwei Zhang <yiwzhang@google.com> Reviewed-by: Josip Sokcevic <sokcevic@chromium.org>