Only upload non-empty packets to performance dashboard.

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 179 matching lines @@
         chart_data_recorder = perf_dashboard.ChartDataRecorder(
             script_args.test_name)
 
       benchmark_succeeded, benchmark_error, output = _run_benchmark(
           shell, shell_args, app, duration, measurements, script_args.verbose,
           script_args.android, output_file)
 
       print '[ %s ] %s ' % (benchmark_name, variant_name)
 
       some_measurements_failed = False
+      some_measurements_succeeded = False
       if benchmark_succeeded:
         measurement_results = _parse_measurement_results(output)
         # Iterate over the list of specs, not the dictionary, to detect missing
         # results and preserve the required order.
         for measurement in measurements:
           if measurement['spec'] in measurement_results:
             result = measurement_results[measurement['spec']]
             print '%10.4f  %s' % (result, measurement['name'])
 
             if chart_data_recorder:
               chart_name = benchmark_name + '__' + variant_name
               chart_data_recorder.record_scalar(
                   perf_dashboard.normalize_label(chart_name),
                   perf_dashboard.normalize_label(measurement['name']),
                   'ms', result)
+            some_measurements_succeeded = True
           else:
             print '?  %s' % measurement['name']
             some_measurements_failed = True
 
       if not benchmark_succeeded or some_measurements_failed:
         if not benchmark_succeeded:
           print 'benchmark failed: ' + benchmark_error
         if some_measurements_failed:
           print 'some measurements failed'
         print 'output: '
         print '-' * 72
         print output
         print '-' * 72
         exit_code = 1
 
-      if script_args.upload:
+      if script_args.upload and some_measurements_succeeded:
         if not 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):
           exit_code = 1
 
   return exit_code
 
 if __name__ == '__main__':
   sys.exit(main())