Add an "in_unit_test_mode" attribute to the environment. Use this to default output format to 'gtes…

content/test/gpu/gpu_tests/webgl_conformance.py

 # Copyright (c) 2012 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 json
 import optparse
 import os
 import sys
 
 import webgl_conformance_expectations
 
@@ skipping 50 matching lines @@
   };
 """
 
 def _DidWebGLTestSucceed(tab):
   return tab.EvaluateJavaScript('webglTestHarness._allTestSucceeded')
 
 def _WebGLTestMessages(tab):
   return tab.EvaluateJavaScript('webglTestHarness._messages')
 
 class WebglConformanceValidator(page_test.PageTest):
+  options = {'output_format': 'gtest'}
+
   def __init__(self):
     super(WebglConformanceValidator, self).__init__(attempts=1, max_failures=10)
 
   def ValidatePage(self, page, tab, results):
     if not _DidWebGLTestSucceed(tab):
       raise page_test.Failure(_WebGLTestMessages(tab))
 
   def CustomizeBrowserOptions(self, options):
     options.AppendExtraBrowserArgs([
         '--disable-gesture-requirement-for-media-playback',
@@ skipping 82 matching lines @@
 
         if '.txt' in test_name:
           include_path = os.path.join(current_dir, test_name)
           test_paths += WebglConformance._ParseTests(
             include_path, version)
         else:
           test = os.path.join(current_dir, test_name)
           test_paths.append(test)
 
     return test_paths