Benchmark: `--save-all-traces` argument

mojo/devtools/common/mojo_benchmark

 #!/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.
 
 """Runner for Mojo application benchmarks."""
 
 import argparse
 import logging
 import os.path
@@ skipping 130 matching lines @@
         pass
   return measurement_results
 
 
 def main():
   parser = argparse.ArgumentParser(
       formatter_class=argparse.RawDescriptionHelpFormatter,
       description=_DESCRIPTION)
   parser.add_argument('benchmark_list_file', type=file,
                       help='a file listing benchmarks to run')
-  parser.add_argument('--save-traces', action='store_true',
+  parser.add_argument('--save-all-traces', action='store_true',
                       help='save the traces produced by benchmarks to disk')
   perf_dashboard.add_argparse_server_arguments(parser)
 
   # Common shell configuration arguments.
   shell_config.add_shell_arguments(parser)
   script_args = parser.parse_args()
   config = shell_config.get_shell_config(script_args)
 
   try:
     shell, common_shell_args = shell_arguments.get_shell(config, [])
@@ skipping 10 matching lines @@
     benchmark_name = benchmark_spec['name']
 
     for variant_spec in _generate_benchmark_variants(benchmark_spec):
       variant_name = variant_spec['variant_name']
       app = variant_spec['app']
       duration = variant_spec['duration']
       shell_args = variant_spec.get('shell-args', []) + common_shell_args
       measurements = variant_spec['measurements']
 
       output_file = None
-      if script_args.save_traces:
+      if script_args.save_all_traces:
         output_file = 'benchmark-%s-%s-%s.trace' % (
             benchmark_name.replace(' ', '_'),
             variant_name.replace(' ', '_'),
             time.strftime('%Y%m%d%H%M%S'))
 
       chart_data_recorder = None
       if script_args.upload:
         chart_data_recorder = perf_dashboard.ChartDataRecorder(
             script_args.test_name)
 
@@ skipping 38 matching lines @@
         perf_dashboard.upload_chart_data(
             script_args.master_name, script_args.bot_name,
             script_args.test_name, script_args.builder_name,
             script_args.build_number, chart_data_recorder.get_chart_data(),
             script_args.server_url, script_args.dry_run)
 
   return exit_code
 
 if __name__ == '__main__':
   sys.exit(main())