Start webdriver session after creating it.

servo · jdm · Jul 4, 2016 · Jul 7, 2016 · Sep 13, 2016 · Sep 13, 2016
commit cdfe796858603f0e1510a186b959a5d2577f91e0
diff --git a/tests/wpt/harness/wptrunner/executors/executorservo.py b/tests/wpt/harness/wptrunner/executors/executorservo.py
@@ -301,6 +301,7 @@ def setup(self, runner):
                 "Establishing new WebDriver session with %s" % self.server.url)
             self.session = webdriver.Session(
                 self.server.host, self.server.port, self.server.base_path)
+            self.session.start()
         except Exception:
             self.logger.error(traceback.format_exc())
             self.executor.runner.send_message("init_failed")