GitLab

        Reviewed by David Levin.

        check-webkit-style should check ChangeLog for a valid bug number
        https://bugs.webkit.org/show_bug.cgi?id=57184

        * Scripts/webkitpy/style/checker.py:
        * Scripts/webkitpy/style/checker_unittest.py:
        * Scripts/webkitpy/style/checkers/changelog.py: Added.
        * Scripts/webkitpy/style/checkers/changelog_unittest.py: Added.

git-svn-id: svn://svn.chromium.org/blink/trunk@82083 bbb929c8-8fbe-4397-9dbb-9b2b20218538