Add Wait* API to ActionRunner to wrap over WaitAction.

tools/perf/page_sets/gmail_alt_two_labels.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 GmailAltTwoLabelsPage(page_module.Page):
 
   """ Why: Alternate between Inbox and Sent Mail """
 
   def __init__(self, page_set):
     super(GmailAltTwoLabelsPage, self).__init__(
       url='https://mail.google.com/mail/',
       page_set=page_set,
       name='gmail_alt_two_labels')
 
     self.credentials_path = 'data/credentials.json'
     self.credentials = 'google'
     self.user_agent_type = 'desktop'
     self.archive_data_file = 'data/gmail_alt_two_labels.json'
 
   def RunNavigateSteps(self, action_runner):
     action_runner.NavigateToPage(self)
-    action_runner.RunAction(WaitAction(
-      {
-        'javascript':
-        'window.gmonkey !== undefined && document.getElementById("gb") !== null'
-      }))
+    action_runner.WaitForJavaScriptCondition(
+        'window.gmonkey !== undefined && '
+        'document.getElementById("gb") !== null')
 
   def RunEndure(self, action_runner):
     action_runner.RunAction(ClickElementAction(
       {
         'wait_until': {'condition': 'href_change'},
         'selector': 'a[href="https://mail.google.com/mail/u/0/?shva=1#sent"]'
       }))
-    action_runner.RunAction(WaitAction({'seconds': 1}))
+    action_runner.Wait(1)
     action_runner.RunAction(ClickElementAction(
       {
         'wait_until': {'condition': 'href_change'},
         'selector': 'a[href="https://mail.google.com/mail/u/0/?shva=1#inbox"]'
       }))
-    action_runner.RunAction(WaitAction({'seconds': 1}))
+    action_runner.Wait(1)
 
 
 class GmailAltTwoLabelsPageSet(page_set_module.PageSet):
 
   """ Chrome Endure test for GMail. """
 
   def __init__(self):
     super(GmailAltTwoLabelsPageSet, self).__init__(
       credentials_path='data/credentials.json',
       user_agent_type='desktop',
       archive_data_file='data/gmail_alt_two_labels.json')
 
     self.AddPage(GmailAltTwoLabelsPage(self))