2010-12-02 Dirk Pranke <dpranke@chromium.org>

2010-12-02  Dirk Pranke  <dpranke@chromium.org>

        Reviewed by Tony Chang.

        nrwt multiprocessing - move logic back into run_webkit_tests

        This change moves a bunch of logic that I had put into
        message_broker back into run_webkit_tests, in a slightly
        different format. WorkerMessageBroker needed to become less aware of
        the logic the TestRunner class uses, and more generic.
        Eventually the MessageBroker will only do generic messaging and
        thread/process-pooling, and (almost) all of the
        run-webkit-tests-specific logic will be moved to
        run_webkit_tests.py and dump_render_tree_thread.py.

        The biggest changes are that the Broker can now start a single
        worker, but the responsibility for starting all of them is pushed
        back to the TestRunner (Manager), and the logic for checking if
        the threads are done or wedged is moved back to TestRunner. We
        also remove WorkerMessageBroker.cleanup (not needed) and
        cancel_workers (they have to be cancelled individually).

        The  message_broker is now encapsulated inside
        TestRunner._run_tests(); it only needs to exist while actually
        running the tests.

        Also, delete a bunch of tests in message_broker_unittest that no
        longer make much sense.

        This patch depends on bug 50372.

        https://bugs.webkit.org/show_bug.cgi?id=50374

        * Scripts/webkitpy/layout_tests/layout_package/dump_render_tree_thread.py:
        * Scripts/webkitpy/layout_tests/layout_package/message_broker.py:
        * Scripts/webkitpy/layout_tests/layout_package/message_broker_unittest.py:
        * Scripts/webkitpy/layout_tests/run_webkit_tests.py:
        * Scripts/webkitpy/layout_tests/run_webkit_tests_unittest.py:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@73231 268f45cc-cd09-0410-ab3c-d52691b4dbfc