Add Wait* API to ActionRunner to wrap over WaitAction.

content/test/gpu/gpu_tests/webgl_robustness.py

 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 from telemetry import test
 from telemetry.page import page
 from telemetry.page import page_set
 from telemetry.page import page_test
 # pylint: disable=W0401,W0614
 from telemetry.page.actions.all_page_actions import *
 
@@ skipping 40 matching lines @@
 class WebglRobustnessPage(page.Page):
   def __init__(self, page_set, base_dir):
     super(WebglRobustnessPage, self).__init__(
       url='file://extra/lots-of-polys-example.html',
       page_set=page_set,
       base_dir=base_dir)
     self.script_to_evaluate_on_commit = robustness_harness_script
 
   def RunNavigateSteps(self, action_runner):
     action_runner.NavigateToPage(self)
-    action_runner.RunAction(
-      WaitAction({'javascript': 'webglTestHarness._finished'}))
+    action_runner.WaitForJavaScriptCondition('webglTestHarness._finished')
 
 class WebglRobustness(test.Test):
   test = WebglConformanceValidator
 
   def CreatePageSet(self, options):
     ps = page_set.PageSet(
       file_path=conformance_path,
       user_agent_type='desktop',
       serving_dirs=[''])
     ps.AddPage(WebglRobustnessPage(ps, ps.base_dir))
     return ps