Add Wait* API to ActionRunner to wrap over WaitAction.

content/test/gpu/page_sets/gpu_rasterization_tests.py

 # Copyright 2014 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.
 # pylint: disable=W0401,W0614
 from telemetry.page.actions.all_page_actions import *
 from telemetry.page import page as page_module
 from telemetry.page import page_set as page_set_module
 
 
 class GpuRasterizationTestsPage(page_module.Page):
@@ skipping 51 matching lines @@
        'location': [140, 140]},
       {'comment': 'box-l',
        'color': [0, 0, 255],
        'tolerance': 0,
        'location': [70, 140]}
     ]
     self.test_rect = [0, 0, 220, 220]
 
   def RunNavigateSteps(self, action_runner):
     action_runner.NavigateToPage(self)
-    action_runner.RunAction(WaitAction(
-      {
-        'javascript': 'domAutomationController._finished',
-        'timeout': 30
-      }))
+    action_runner.WaitForJavaScriptCondition(
+        'domAutomationController._finished', timeout=30)
 
 
 class GpuRasterizationTestsPageSet(page_set_module.PageSet):
 
   """ Basic test cases for GPU rasterization. """
 
   def __init__(self):
     super(GpuRasterizationTestsPageSet, self).__init__()
 
     self.AddPage(GpuRasterizationTestsPage(self))