[telemetry] Let ScrollToElement callers pass root

telemetry/telemetry/internal/actions/action_runner_unittest.py

Index: telemetry/telemetry/internal/actions/action_runner_unittest.py
diff --git a/telemetry/telemetry/internal/actions/action_runner_unittest.py b/telemetry/telemetry/internal/actions/action_runner_unittest.py
index b8ea6bd3f980fb5730208d143e61e14b6efbfc35..19824586796d1775b235d78e7912234568b35fc4 100644
--- a/telemetry/telemetry/internal/actions/action_runner_unittest.py
+++ b/telemetry/telemetry/internal/actions/action_runner_unittest.py
@@ -332,10 +332,10 @@ class ActionRunnerTest(tab_test_case.TabTestCase):
 
     self.assertEqual(viewport_comparator(top_bottom_element), -1)
     action_runner.ScrollPageToElement(selector='#top-bottom',
+                                      container_selector='body',
                                       speed_in_pixels_per_second=5000)
     self.assertEqual(viewport_comparator(top_bottom_element), 0)
 
-
   @decorators.Disabled('android',   # crbug.com/437065.
                        'chromeos')  # crbug.com/483212.
   def testScroll(self):