2010-08-17 Dirk Pranke <dpranke@chromium.org>

2010-08-17  Dirk Pranke  <dpranke@chromium.org>

        Reviewed by Eric Seidel.

        fix test-webkitpy, add easy way to find a checkout root

        test-webkitpy currently doesn't work right if run from someplace other
        than the checkout root, and it spews a bunch of debug logging because
        the deduplicate_tests tests contaminates the test environment.

        This patch cleans up the deduplicate_tests unit tests, and creates
        two new methods in scm.py: find_checkout_root() and default_scm(),
        both of which use a single algorithm for guessing what checkout root
        to use if you aren't explicitly told one from a path.

        https://bugs.webkit.org/show_bug.cgi?id=44001

        * Scripts/deduplicate-tests:
        * Scripts/webkitpy/common/checkout/scm.py:
        * Scripts/webkitpy/common/checkout/scm_unittest.py:
        * Scripts/webkitpy/layout_tests/deduplicate_tests.py:
        * Scripts/webkitpy/layout_tests/deduplicate_tests_unittest.py:
        * Scripts/webkitpy/layout_tests/port/test.py:
        * Scripts/webkitpy/layout_tests/rebaseline_chromium_webkit_tests.py:
        * Scripts/webkitpy/layout_tests/rebaseline_chromium_webkit_tests_unittest.py:
        * Scripts/webkitpy/tool/main.py:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@65572 268f45cc-cd09-0410-ab3c-d52691b4dbfc