sandwich: Aggregates metrics per URLs

tools/android/loading/pull_sandwich_metrics_unittest.py

 # Copyright 2016 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 copy
 import json
 import os
 import shutil
 import subprocess
 import tempfile
@@ skipping 128 matching lines @@
   def testPullMetricsFromTrace(self):
     metrics = puller._PullMetricsFromTrace(_MINIMALIST_TRACE)
     self.assertEquals(4, len(metrics))
     self.assertEquals(20, metrics['total_load'])
     self.assertEquals(5, metrics['onload'])
     self.assertEquals(30971, metrics['browser_malloc_avg'])
     self.assertEquals(55044, metrics['browser_malloc_max'])
 
   def testCommandLine(self):
     tmp_dir = tempfile.mkdtemp()
+    with open(os.path.join(tmp_dir, 'run_infos.json'), 'w') as out_file:
+      json.dump({'urls': ['a.com', 'b.com', 'c.org']}, out_file)
     for dirname in ['1', '2', 'whatever']:
       os.mkdir(os.path.join(tmp_dir, dirname))
       with open(os.path.join(tmp_dir, dirname, 'trace.json'), 'w') as out_file:
         json.dump(_MINIMALIST_TRACE, out_file)
 
     process = subprocess.Popen(['python', puller.__file__, tmp_dir])
     process.wait()
     shutil.rmtree(tmp_dir)
 
     self.assertEquals(0, process.returncode)
 
 
 if __name__ == '__main__':
   unittest.main()