Unittest for page_runner, etc. should suppress output from gtest_progress_reporter

tools/telemetry/telemetry/results/results_options.py

Index: tools/telemetry/telemetry/results/results_options.py
diff --git a/tools/telemetry/telemetry/results/results_options.py b/tools/telemetry/telemetry/results/results_options.py
index 1d330cfb69455b5ac2af7d21fefdc10887858aa1..c8b95e5ac62fec2993d81eff3141908821d3fa18 100644
--- a/tools/telemetry/telemetry/results/results_options.py
+++ b/tools/telemetry/telemetry/results/results_options.py
@@ -13,6 +13,7 @@ from telemetry.results import gtest_progress_reporter
 from telemetry.results import html_output_formatter
 from telemetry.results import json_output_formatter
 from telemetry.results import page_test_results
+from telemetry.results import progress_reporter
 
 
 # Allowed output formats. The default is the first item in the list.
@@ -40,10 +41,17 @@ def AddResultsOptions(parser):
   group.add_option('--results-label',
                     default=None,
                     help='Optional label to use for the results of a run .')
+  group.add_option('--suppress_gtest_report',
+                   default=False,
+                   help='Whether to suppress GTest progress report.')
   parser.add_option_group(group)
 
 
 def CreateResults(metadata, options):
+  """
+  Args:
+    options: Contains the options specified in AddResultsOptions.
+  """
   # TODO(chrishenry): This logic prevents us from having multiple
   # OutputFormatters. We should have an output_file per OutputFormatter.
   # Maybe we should have --output-dir instead of --output-file?
@@ -63,6 +71,7 @@ def CreateResults(metadata, options):
 
   output_formatters = []
   output_skipped_tests_summary = True
+  reporter = None
   if options.output_format == 'none':
     pass
   elif options.output_format == 'csv':
@@ -97,7 +106,10 @@ def CreateResults(metadata, options):
                     % (options.output_format,
                        ', '.join(_OUTPUT_FORMAT_CHOICES)))
 
-  reporter = gtest_progress_reporter.GTestProgressReporter(
-      sys.stdout, output_skipped_tests_summary=output_skipped_tests_summary)
+  if options.suppress_gtest_report:
+    reporter = progress_reporter.ProgressReporter()
+  else:
+    reporter = gtest_progress_reporter.GTestProgressReporter(
+        sys.stdout, output_skipped_tests_summary=output_skipped_tests_summary)
   return page_test_results.PageTestResults(
       output_formatters=output_formatters, progress_reporter=reporter)