Create ActionRunner wrapper API over TapAction and ClickElementAction.

tools/perf/page_sets/gmail_alt_threadlist_conversation.py

Index: tools/perf/page_sets/gmail_alt_threadlist_conversation.py
diff --git a/tools/perf/page_sets/gmail_alt_threadlist_conversation.py b/tools/perf/page_sets/gmail_alt_threadlist_conversation.py
index 5e1c53641c29e6d99032e88cfee393f825418595..7630c5af5da2ccacdf8d1fa99693e95354128c25 100644
--- a/tools/perf/page_sets/gmail_alt_threadlist_conversation.py
+++ b/tools/perf/page_sets/gmail_alt_threadlist_conversation.py
@@ -1,12 +1,33 @@
 # 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
 
 
+def _CreateXpathFunction(xpath):
+  return ('document.evaluate("%s",'
+                             'document,'
+                             'null,'
+                             'XPathResult.FIRST_ORDERED_NODE_TYPE,'
+                             'null)'
+          '.singleNodeValue' % re.escape(xpath))
+
+
+def _GetCurrentLocation(action_runner):
+  return action_runner.EvaluateJavaScript('document.location.href')
+
+
+def _WaitForLocationChange(action_runner, old_href):
+  action_runner.WaitForJavaScriptCondition(
+      'document.location.href != "%s"' % old_href)
+
+
 class GmailAltThreadlistConversationPage(
   page_module.Page):
 
@@ -29,17 +50,15 @@ class GmailAltThreadlistConversationPage(
         'document.getElementById("gb") !== null')
 
   def RunEndure(self, action_runner):
-    action_runner.RunAction(ClickElementAction(
-      {
-        'xpath': '//span[@email]',
-        'wait_until': {'condition': 'href_change'}
-      }))
+    old_href = _GetCurrentLocation(action_runner)
+    action_runner.ClickElement(
+        element_function=_CreateXpathFunction('//span[@email]'))
+    _WaitForLocationChange(action_runner, old_href)
     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"]'
-      }))
+    old_href = _GetCurrentLocation(action_runner)
+    action_runner.ClickElement(
+        'a[href="https://mail.google.com/mail/u/0/?shva=1#inbox"]')
+    _WaitForLocationChange(action_runner, old_href)
     action_runner.Wait(1)