Add Wait* API to ActionRunner to wrap over WaitAction.

tools/perf/page_sets/polymer.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 PolymerPage(page_module.Page):
 
   def __init__(self, url, page_set):
     super(PolymerPage, self).__init__(
       url=url,
       page_set=page_set)
     self.archive_data_file = "data/polymer.json"
     self.script_to_evaluate_on_commit = '''
       document.addEventListener("polymer-ready", function() {
         window.__polymer_ready = true;
       });
     '''
 
   def RunNavigateSteps(self, action_runner):
     action_runner.NavigateToPage(self)
-    action_runner.RunAction(WaitAction(
-      { 'javascript': "window.__polymer_ready" }))
+    action_runner.WaitForJavaScriptCondition(
+        'window.__polymer_ready')
 
 
 class PolymerCalculatorPage(PolymerPage):
 
   def __init__(self, page_set):
     super(PolymerCalculatorPage, self).__init__(
       url='http://localhost:8000/components/paper-calculator/demo.html',
       page_set=page_set)
 
   def RunSmoothness(self, action_runner):
@@ skipping 51 matching lines @@
 
   def __init__(self, page_set):
     super(PolymerShadowPage, self).__init__(
       url='http://localhost:8000/components/paper-shadow/demo.html',
       page_set=page_set)
     self.archive_data_file = 'data/polymer.json'
 
   def RunSmoothness(self, action_runner):
     action_runner.ExecuteJavaScript(
         "document.getElementById('fab').scrollIntoView()")
-    action_runner.RunAction(WaitAction(
-      {
-        'seconds': 5
-      }))
+    action_runner.Wait(5)
     self.AnimateShadow(action_runner, 'card')
     self.AnimateShadow(action_runner, 'fab')
 
   def AnimateShadow(self, action_runner, eid):
     for i in range(1, 6):
       action_runner.ExecuteJavaScript(
           'document.getElementById("{0}").z = {1}'.format(eid, i))
-      action_runner.RunAction(WaitAction(
-        {
-          'seconds': 1
-        }))
+      action_runner.Wait(1)
 
 
 class PolymerPageSet(page_set_module.PageSet):
 
   def __init__(self):
     super(PolymerPageSet, self).__init__(
       user_agent_type='mobile',
       archive_data_file='data/polymer.json')
 
     self.AddPage(PolymerCalculatorPage(self))
     self.AddPage(PolymerShadowPage(self))