2010-10-14 Dirk Pranke <dpranke@chromium.org>

2010-10-14  Dirk Pranke  <dpranke@chromium.org>

        Reviewed by Eric Seidel.

        new-run-webkit-tests will now handle missing Ruby installs (or
        missing PrettyPatch scripts) more cleanly - previously this
        would be detected when we actually tried to create the diff, and
        the error message was obscure. Now we'll log a warning up front
        and otherwise be silent.

        This change also refactors some global variables to be class or
        instance variables to be slightly more testable and more
        modular. There are no cases where we create lots of port objects
        and can't afford to test for configurations repeatedly, so
        there's no performance concern here.

        https://bugs.webkit.org/show_bug.cgi?id=47466

        * Scripts/webkitpy/layout_tests/port/base.py:
        * Scripts/webkitpy/layout_tests/port/base_unittest.py:
        * Scripts/webkitpy/layout_tests/port/chromium.py:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@69820 268f45cc-cd09-0410-ab3c-d52691b4dbfc