[telemetry] Update examples so they work.

tools/telemetry/examples/telemetry_perf_test.py

Index: tools/telemetry/examples/telemetry_perf_test.py
diff --git a/tools/telemetry/examples/telemetry_perf_test.py b/tools/telemetry/examples/telemetry_perf_test.py
index f509939634cb20fb202655788d7943c7f72968c6..bb1d21a43b76aa04f151f6016b10fd0090fc216e 100755
--- a/tools/telemetry/examples/telemetry_perf_test.py
+++ b/tools/telemetry/examples/telemetry_perf_test.py
@@ -2,15 +2,17 @@
 # Copyright (c) 2012 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 os
 import sys
 import time
 
-sys.path.append(os.path.join(os.path.dirname(__file__), '..'))
+sys.path.append(os.path.join(os.path.dirname(__file__), os.pardir))
 
 from telemetry.core import browser_finder
 from telemetry.core import browser_options
 
+
 def Main(args):
   options = browser_options.BrowserFinderOptions()
   parser = options.CreateParser('telemetry_perf_test.py')
@@ -40,5 +42,6 @@ def Main(args):
 
   return 0
 
+
 if __name__ == '__main__':
   sys.exit(Main(sys.argv[1:]))