Port Maps test to browser_test_runner harness.

content/test/gpu/gpu_tests/context_lost_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.
 
 import os
 import time
 
 from gpu_tests import gpu_integration_test
 from gpu_tests import context_lost_expectations
 from gpu_tests import path_util
 
+import py_utils
 from telemetry.core import exceptions
-from telemetry.core import util
 
 data_path = os.path.join(
     path_util.GetChromiumSrcDir(), 'content', 'test', 'data', 'gpu')
 
 wait_timeout = 60  # seconds
 
 harness_script = r"""
   var domAutomationController = {};
 
   domAutomationController._loaded = false;
@@ skipping 75 matching lines @@
   @classmethod
   def setUpClass(cls):
     super(cls, ContextLostIntegrationTest).setUpClass()
     cls.CustomizeOptions()
     cls.SetBrowserOptions(cls._finder_options)
     cls.StartBrowser()
     cls.SetStaticServerDirs([data_path])
 
   def _WaitForPageToFinish(self, tab):
     try:
-      util.WaitFor(lambda: tab.EvaluateJavaScript(
+      py_utils.WaitFor(lambda: tab.EvaluateJavaScript(
         'window.domAutomationController._finished'), wait_timeout)
       return True
     except exceptions.TimeoutException:
       return False
 
   def _KillGPUProcess(self, number_of_gpu_process_kills,
                       check_crash_count):
     tab = self.tab
     # Doing the GPU process kill operation cooperatively -- in the
     # same page's context -- is much more stressful than restarting
     # the browser every time.
     for x in range(number_of_gpu_process_kills):
       expected_kills = x + 1
 
       # Reset the test's state.
       tab.EvaluateJavaScript(
         'window.domAutomationController.reset()')
 
       # If we're running the GPU process crash test, we need the test
       # to have fully reset before crashing the GPU process.
       if check_crash_count:
-        util.WaitFor(lambda: tab.EvaluateJavaScript(
+        py_utils.WaitFor(lambda: tab.EvaluateJavaScript(
           'window.domAutomationController._finished'), wait_timeout)
 
       # Crash the GPU process.
       gpucrash_tab = tab.browser.tabs.New()
       # To access these debug URLs from Telemetry, they have to be
       # written using the chrome:// scheme.
       # The try/except is a workaround for crbug.com/368107.
       try:
         gpucrash_tab.Navigate('chrome://gpucrash')
       except Exception:
@@ skipping 102 matching lines @@
 
   def _ContextLost_WebGLContextLostInHiddenTab(self, test_path):
     self._NavigateAndWaitForLoad(test_path)
     # Test losing a context in a hidden tab. This test passes if the tab
     # doesn't crash.
     tab = self.tab
     dummy_tab = tab.browser.tabs.New()
     tab.EvaluateJavaScript('loseContextUsingExtension()')
     tab.Activate()
     self._WaitForTabAndCheckCompletion()