Reland Copy .vpython3 from chromium/src/+/main:.vpython3 As is; looks like failure was caused by just a bad bot. After https://crrev.com/c/3835165 now tests actually run on this cl, rather than being no-op. (except for verify_pep425_tag which doesn't look like something we want) As Jamie noted on https://crrev.com/c/2408717 it can't be easily auto-rolled from the Chromium src/ repo Swarming switched to vpython3 and can't be hacked back easily (https://crbug.com/1346781#c24) so it's probably a good time to just go for this and figure out what is missing or broken (if anything) Bug: chromium:1346781 Bug: angleproject:7576 Change-Id: Iab6643612d254f9b26e2e935d6b5c96fada895e0 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3835166 Commit-Queue: Yuly Novikov <ynovikov@chromium.org> Reviewed-by: Brian Sheedy <bsheedy@chromium.org> Reviewed-by: Yuly Novikov <ynovikov@chromium.org>