[tools/perf] Add smoke test cover for record_wpr list command

tools/perf/scripts_smoke_unittest.py

 # Copyright 2015 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 json
 import os
 import subprocess
 import sys
 import tempfile
 import unittest
@@ skipping 30 matching lines @@
     return_code, stdout = self.RunPerfScript('run_benchmark list')
     self.assertIn('Pass --browser to list benchmarks', stdout)
     self.assertIn('dummy_benchmark.stable_benchmark_1', stdout)
     self.assertEquals(return_code, 0)
 
   def testRunRecordWprHelp(self):
     return_code, stdout = self.RunPerfScript('record_wpr')
     self.assertIn('optional arguments:', stdout)
     self.assertEquals(return_code, 0)
 
+  def testRunRecordWprList(self):
+    return_code, stdout = self.RunPerfScript('record_wpr --list-benchmarks')
+    self.assertIn('kraken', stdout)
+    self.assertEquals(return_code, 0)
+
   def testRunBenchmarkListJSONListsOutBenchmarks(self):
     tmp_file = tempfile.NamedTemporaryFile(delete=False)
     tmp_file_name = tmp_file.name
     tmp_file.close()
     try:
       return_code, _ = self.RunPerfScript(
           'run_benchmark list --json-output %s' % tmp_file_name)
       self.assertEquals(return_code, 0)
       with open(tmp_file_name, 'r') as f:
         benchmark_data = json.load(f)
         self.assertIn('dummy_benchmark.stable_benchmark_1',
                       benchmark_data['steps'])
     finally:
       os.remove(tmp_file_name)