Add support for python pageset

tools/telemetry/telemetry/page/actions/action_runner.py

Index: tools/telemetry/telemetry/page/actions/action_runner.py
diff --git a/tools/telemetry/telemetry/page/actions/action_runner.py b/tools/telemetry/telemetry/page/actions/action_runner.py
new file mode 100644
index 0000000000000000000000000000000000000000..c0c23698d2f69675db06d7f2523f7851defd9a4b
--- /dev/null
+++ b/tools/telemetry/telemetry/page/actions/action_runner.py
@@ -0,0 +1,20 @@
+# Copyright (c) 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.
+
+class ActionRunner(object):
+  def __init__(self, page, tab, page_test=None):
+    self._page = page
+    self._tab = tab
+    self._page_test = page_test
+
+  def RunAction(self, action):
+    if not action.WillWaitAfterRun():
+      action.WillRunAction(self._page, self._tab)
+    if self._page_test:
+      self._page_test.WillRunAction(self._page, self._tab, action)
+    try:
+      action.RunActionAndMaybeWait(self._page, self._tab)
+    finally:
+      if self._page_test:
+        self._page_test.DidRunAction(self._page, self._tab, action)