[tools/perf] Update code to reference py_utils.cloud_storage

tools/perf/fetch_benchmark_deps.py

 #!/usr/bin/env python
 # 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.
 
 """This module fetches and prints the dependencies given a benchmark."""
 
 import os
 import sys
 
 from core import path_util
 
-path_util.AddCatapultBaseToPath()
-from catapult_base import cloud_storage
+path_util.AddPyUtilsToPath()
+from py_utils import cloud_storage
 
 path_util.AddTelemetryToPath()
 from telemetry import benchmark_runner
 
 from chrome_telemetry_build import chromium_config
 
 
 def _FetchDependenciesIfNeeded(story_set):
   """ Download files needed by a user story set. """
   # Download files in serving_dirs.
@@ skipping 56 matching lines @@
   deps = _EnumerateDependencies(story_set)
   for dep in deps:
     print >> output, dep
 
 
 if __name__ == '__main__':
   if len(sys.argv) != 2 or sys.argv[1][0] == '-':
     _show_usage()
   else:
     main()