Create ActionRunner wrapper API over TapAction and ClickElementAction.

tools/perf/page_sets/gmail_compose_discard.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.
 
 import re
 
 # 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
@@ skipping 38 matching lines @@
       button.dispatchEvent(mousedownevent);
       button.dispatchEvent(mouseupevent);''')
 
   def RunEndure(self, action_runner):
     action_runner.WaitForElement(
         element_function=_CreateXpathFunction('//div[text()="COMPOSE"]'))
     self.ComposeClick(action_runner)
     action_runner.Wait(1)
     action_runner.WaitForElement(
         'div[class~="oh"][data-tooltip="Discard draft"]')
-    action_runner.RunAction(ClickElementAction(
-      {
-        'selector': 'div[class~="oh"][data-tooltip="Discard draft"]'
-      }))
+    action_runner.ClickElement('div[class~="oh"][data-tooltip="Discard draft"]')
     action_runner.Wait(1)
 
 
 class GmailComposeDiscardPageSet(page_set_module.PageSet):
 
   """
   Description: Gmail endure test: compose and discard an email.
   """
 
   def __init__(self):
     super(GmailComposeDiscardPageSet, self).__init__(
       credentials_path='data/credentials.json',
       user_agent_type='desktop')
 
     self.AddPage(GmailComposeDiscardPage(self))