Make Telemetry produce CSV, JSON, and HTML by default.

telemetry/telemetry/internal/results/results_options.py

 # Copyright 2014 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.
 
 import codecs
 import optparse
 import os
 import sys
 import time
 
@@ skipping 30 matching lines @@
 }
 
 
 def AddResultsOptions(parser):
   group = optparse.OptionGroup(parser, 'Results options')
   group.add_option(
       '--output-format',
       action='append',
       dest='output_formats',
       choices=_OUTPUT_FORMAT_CHOICES,
-      default=[],
+      default=['csv', 'json', 'html'],
       help='Output format. Defaults to "%%default". '
       'Can be %s.' % ', '.join(_OUTPUT_FORMAT_CHOICES))
   group.add_option(
       '-o',
       '--output',
       dest='output_file',
       default=None,
       help='Redirects output to a file. Defaults to stdout.')
   group.add_option(
       '--output-dir',
@@ skipping 136 matching lines @@
       output_dir=options.output_dir,
       value_can_be_added_predicate=value_can_be_added_predicate,
       benchmark_enabled=benchmark_enabled)
 
   results.telemetry_info.benchmark_name = benchmark_metadata.name
   results.telemetry_info.benchmark_start_epoch = time.time()
   if options.results_label:
     results.telemetry_info.label = options.results_label
 
   return results