Currently, the script requires you to pass the unwanted commits on the
command line, but eventually, you could configure it with a file
(checked into the repo) that provides a fixed set of commits to always
skip (such as commits that do a huge amount of renaming and nothing
else).

BUG=574290

Review URL: https://codereview.chromium.org/1559943003

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@298544 0039d316-1c4b-4281-b951-d872f2087c98