[Telemetry] Add PRESUBMIT check to prevent .sha file uploaded without archive file uploaded

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 @@
   results = []
   old_sys_path = sys.path
   try:
     # Modules in tools/perf depend on telemetry.
     sys.path = [os.path.join(os.pardir, 'telemetry')] + sys.path
     results.extend(input_api.canned_checks.RunPylint(
         input_api, output_api,
         black_list=PYLINT_BLACKLIST,
         disabled_warnings=PYLINT_DISABLED_WARNINGS))
     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
+  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:
+      wpr_filename = filename[:-5]
+      results.append(output_api.PresubmitError(
+          'There is no URLs matched for wpr sha file %s.\n'
+          'You can upload your new wpr archive file with the command:\n'
+          'depot_tools/upload_to_google_storage.py --bucket '
+          '<Your pageset\'s bucket> %s.\nFor more info: see '
+          'http://www.chromium.org/developers/telemetry/'
+          'record_a_page_set#TOC-Upload-the-recording-to-Cloud-Storage' %
+          (filename, wpr_filename)))
+  return results
+
+
 def _CheckJson(input_api, output_api):
   """Checks whether JSON files in this change can be parsed."""
   for affected_file in input_api.AffectedFiles(include_deletes=False):
     filename = affected_file.AbsoluteLocalPath()
     if os.path.splitext(filename)[1] != '.json':
       continue
     try:
       input_api.json.load(open(filename))
     except ValueError:
       return [output_api.PresubmitError('Error parsing JSON in %s!' % filename)]
   return []
 
 
 def CheckChangeOnUpload(input_api, output_api):
   report = []
   report.extend(_CommonChecks(input_api, output_api))
   return report
 
 
 def CheckChangeOnCommit(input_api, output_api):
   report = []
   report.extend(_CommonChecks(input_api, output_api))
   return report