"error: values of type 'NSInteger' should not be used as format arguments; add an explicit cast to 'long' instead" Casting to long is already a common practice in the code base. This has been blocking the Chromium roll which contains an update to clang 6.0.0 BUG=None Review-Url: https://codereview.webrtc.org/2987693002 Cr-Commit-Position: refs/heads/master@{#19127}