[NOT FOR SUBMIT] Reproduce cascading failures of gpu integration test

content/test/gpu/gpu_tests/webgl_conformance_integration_test.py

 # Copyright 2016 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.
 
 from gpu_tests import gpu_integration_test
 from gpu_tests import webgl_conformance
 from gpu_tests import webgl_conformance_expectations
 from gpu_tests import webgl2_conformance_expectations
 
+_GLOBAL_COUNT = 0
 
 class WebGLConformanceIntegrationTest(gpu_integration_test.GpuIntegrationTest):
 
   _webgl_version = None
 
+  def setUp(self):
+    super(WebGLConformanceIntegrationTest, self).setUp()
+    global _GLOBAL_COUNT
+    _GLOBAL_COUNT += 1
+    if _GLOBAL_COUNT == 4:
+      self.tab.Navigate('chrome://crash')
+
   @classmethod
   def Name(cls):
     return 'webgl_conformance'
 
   @classmethod
   def AddCommandlineArgs(cls, parser):
     parser.add_option('--webgl-conformance-version',
         help='Version of the WebGL conformance tests to run.',
         default='1.0.4')
     parser.add_option('--webgl2-only',
@@ skipping 44 matching lines @@
       return webgl2_conformance_expectations.WebGL2ConformanceExpectations(
           webgl_conformance.conformance_path)
 
   @classmethod
   def setUpClass(cls):
     super(cls, WebGLConformanceIntegrationTest).setUpClass()
     cls.CustomizeOptions()
     cls.SetBrowserOptions(cls._finder_options)
     cls.StartBrowser()
     cls.SetStaticServerDir(webgl_conformance.conformance_path)