Move cloud_storage to catapult_base.

tools/perf/PRESUBMIT.py

 # Copyright 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.
 
 """Presubmit script for changes affecting tools/perf/.
 
 See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
 for more details about the presubmit API built into depot_tools.
 """
 
@@ skipping 13 matching lines @@
         input_api, output_api, black_list=[], pylintrc='pylintrc'))
     results.extend(_CheckJson(input_api, output_api))
     results.extend(_CheckWprShaFiles(input_api, output_api))
   finally:
     sys.path = old_sys_path
   return results
 
 
 def _CheckWprShaFiles(input_api, output_api):
   """Check whether the wpr sha files have matching URLs."""
-  from telemetry.util import cloud_storage
+  from catapult_base import cloud_storage
   results = []
   for affected_file in input_api.AffectedFiles(include_deletes=False):
     filename = affected_file.AbsoluteLocalPath()
     if not filename.endswith('wpr.sha1'):
       continue
     expected_hash = cloud_storage.ReadHash(filename)
     is_wpr_file_uploaded = any(
         cloud_storage.Exists(bucket, expected_hash)
         for bucket in cloud_storage.BUCKET_ALIASES.itervalues())
     if not is_wpr_file_uploaded:
@@ skipping 71 matching lines @@
   bots_string = ';'.join(bots)
   description = original_description
   description += '\nCQ_EXTRA_TRYBOTS=%s' % bots_string
   results.append(output_api.PresubmitNotifyResult(
       'Automatically added Perf trybots to run Telemetry benchmarks on CQ.'))
 
   if description != original_description:
    rietveld_obj.update_description(issue, description)
 
   return results