What do those revision numbers represent? Are they binary builds? They don't look like svn/git commits. If we have a commit range, we can view the changelog between them by plugging the revision numbers into one of these URLs: https://chromium.googlesource.com/chromium/src/+log/SUCCESS_REV..FAILURE_REV?pretty=fuller http://build.chromium.org/f/chromium/perf/dashboard/ui/changelog.html?url=/trunk/src&mode=html&range=SUCCESS_REV:FAILURE_REV (see https://code.google.com/p/chromium/wiki/UsefulURLs)