Unittest for page_runner, etc. should suppress output from gtest_progress_reporter

tools/telemetry/telemetry/page/page_measurement_unittest_base.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 unittest
 
 from telemetry import benchmark
 from telemetry.core import exceptions
 from telemetry.core import util
 from telemetry.page import page_runner
@@ skipping 48 matching lines @@
     measurement.SetArgumentDefaults(temp_parser)
     defaults = temp_parser.get_default_values()
     for k, v in defaults.__dict__.items():
       if hasattr(options, k):
         continue
       setattr(options, k, v)
 
     measurement.CustomizeBrowserOptions(options.browser_options)
     options.output_file = None
     options.output_format = 'none'
+    options.suppress_gtest_report = True
     options.output_trace_tag = None
     page_runner.ProcessCommandLineArgs(temp_parser, options)
     measurement.ProcessCommandLineArgs(temp_parser, options)
     results = results_options.CreateResults(EmptyMetadataForTest(), options)
     page_runner.Run(measurement, ps, expectations, options, results)
     return results
 
   def TestTracingCleanedUp(self, measurement_class, options=None):
     ps = self.CreatePageSetFromFileInUnittestDataDir('blank.html')
     start_tracing_called = [False]
@@ skipping 20 matching lines @@
 
         return measurement_class.TabForPage(self, page, browser)
 
     measurement = BuggyMeasurement()
     try:
       self.RunMeasurement(measurement, ps, options=options)
     except page_test.TestNotSupportedOnPlatformFailure:
       pass
     if start_tracing_called[0]:
       self.assertTrue(stop_tracing_called[0])