Add stats script.

This includes some feature additions and bug fixes:
- Add additional date modifiers.
- Handle case where patchset is missing from an issue.
- Fix date issue that occurs with some CLs.
- Add support for importing 'stats' and calling its methods.
- Add BERSERK and BINARY_FILE2 message handling.
- Add FAILED_PATCHSET and INTERNAL_ERROR message handling.
- Add APPLY2 message handling.
- Change number of items per search to 100.
- Make output unbuffered.
- Change the QPS throttle to allow up to 20 QPS.

Also some extra changes:
- Add script to call stats.py.
- Ensure all lines are < 80 chars and indent is +2.
- Add skia tracking.

Original author: [email protected]
Modifications by: [email protected]
Further modifications by: [email protected]

[email protected]
BUG=330869

Review URL: https://codereview.chromium.org/121763002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/commit-queue@242625 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed