Add a link to the perf dashboard in the test output.

mojo/tools/perf_test_runner.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.
 
 """A tool that runs a perf test and uploads the resulting data to the
 performance dashboard.
 """
 
 import argparse
 from mopy import perf_data_uploader
 from mopy.version import Version
 import subprocess
 import sys
 
 
-def _GetCurrentCommitCount():
-  return subprocess.check_output(
-      ["git", "rev-list", "HEAD", "--count"]).strip()
-
-
 def main():
   parser = argparse.ArgumentParser(
       description="A tool that runs a perf test and uploads the resulting data "
                   "to the performance dashboard.")
 
   parser.add_argument(
       "--master-name",
       help="Buildbot master name, used to construct link to buildbot log by "
            "the dashboard, and also as the top-level category for the data.")
   parser.add_argument(
       "--perf-id",
       help="Used as the second-level category for the data, usually the "
            "platform type.")
   parser.add_argument(
       "--test-name",
       help="Name of the test that the perf data was generated from.")
   parser.add_argument(
       "--builder-name",
       help="Buildbot builder name, used to construct link to buildbot log by "
            "the dashboard.")
   parser.add_argument(
       "--build-number", type=int,
       help="Build number, used to construct link to buildbot log by the "
            "dashboard.")
   parser.add_argument(
       "--perf-data-path",
       help="The path to the perf data that the perf test generates.")
+  parser.add_argument(
+      "--point-id", type=int,
+      help="The x coordinate for the data points.")
   server_group = parser.add_mutually_exclusive_group()
   server_group.add_argument(
       "--testing-dashboard", action="store_true", default=True,
       help="Upload the data to the testing dashboard (default).")
   server_group.add_argument(
       "--production-dashboard", dest="testing_dashboard", action="store_false",
       default=False, help="Upload the data to the production dashboard.")
   parser.add_argument("command", nargs=argparse.REMAINDER)
   args = parser.parse_args()
 
   subprocess.check_call(args.command)
 
   if args.master_name is None or \
      args.perf_id is None or \
      args.test_name is None or \
      args.builder_name is None or \
      args.build_number is None or \
-     args.perf_data_path is None:
+     args.perf_data_path is None or \
+     args.point_id is None:
     print "Won't upload perf data to the dashboard because not all of the " \
           "following values are specified: master-name, perf-id, test-name, " \
-          "builder-name, build-number, perf-data-path."
+          "builder-name, build-number, perf-data-path, point-id."
     return 0
 
   revision = Version().version
   perf_data = open(args.perf_data_path, "r")
-  point_id = _GetCurrentCommitCount()
 
   result = perf_data_uploader.UploadPerfData(
       args.master_name, args.perf_id, args.test_name, args.builder_name,
-      args.build_number, revision, perf_data, point_id, False,
+      args.build_number, revision, perf_data, args.point_id, False,
       args.testing_dashboard)
 
   return 0 if result else 1
 
 
 if __name__ == '__main__':
   sys.exit(main())