Revert of [Telemetry] Migrate browser_test_runner to use typ as the test runner

telemetry/telemetry/testing/serially_executed_browser_test_case.py

Index: telemetry/telemetry/testing/serially_executed_browser_test_case.py
diff --git a/telemetry/telemetry/testing/serially_executed_browser_test_case.py b/telemetry/telemetry/testing/serially_executed_browser_test_case.py
index 1bb1f6e72584626c1c300160c226ec0af1869945..3a469cb3cfdd9ee49c86b43efab8d7df81c9f906 100644
--- a/telemetry/telemetry/testing/serially_executed_browser_test_case.py
+++ b/telemetry/telemetry/testing/serially_executed_browser_test_case.py
@@ -8,7 +8,7 @@
 
 from py_utils import cloud_storage
 from telemetry.internal.browser import browser_finder
-from telemetry.testing import browser_test_context
+from telemetry.testing import options_for_unittests
 from telemetry.util import wpr_modes
 
 
@@ -30,12 +30,8 @@
     pass
 
   @classmethod
-  def SetUpProcess(cls):
-    """ Set up testing logic before running the test case.
-    This is guaranteed to be called only once for all the tests before the test
-    suite runs.
-    """
-    cls._finder_options = browser_test_context.GetCopy().finder_options
+  def setUpClass(cls):
+    cls._finder_options = options_for_unittests.GetCopy()
     cls.platform = None
     cls.browser = None
     cls._browser_to_create = None
@@ -96,12 +92,7 @@
     cls.browser = None
 
   @classmethod
-  def TearDownProcess(cls):
-    """ Tear down the testing logic after running the test cases.
-    This is guaranteed to be called only once for all the tests after the test
-    suite finishes running.
-    """
-
+  def tearDownClass(cls):
     if cls.platform:
       cls.platform.StopAllLocalServers()
       cls.platform.network_controller.Close()
@@ -151,24 +142,15 @@
     test cases to be run.
   """
   suite = unittest.TestSuite()
-  test_context = browser_test_context.GetCopy()
-  if not test_context:
+  finder_options = options_for_unittests.GetCopy()
+  if not hasattr(finder_options, 'browser_test_runner_running'):
     return suite
   for _, obj in inspect.getmembers(module):
     if (inspect.isclass(obj) and
         issubclass(obj, SeriallyExecutedBrowserTestCase)):
-      # We bail out early if this class doesn't match the targeted
-      # test_class in test_context to avoid calling GenerateTestCases
-      # for tests that we don't intend to run. This is to avoid possible errors
-      # in GenerateTestCases as the test class may define custom options in
-      # the finder_options object, and hence would raise error if they can't
-      # find their custom options in finder_options object.
-      if test_context.test_class != obj:
-        continue
       for test in GenerateTestCases(
-          test_class=obj, finder_options=test_context.finder_options):
-        if test.id() in test_context.test_case_ids_to_run:
-          suite.addTest(test)
+          test_class=obj, finder_options=finder_options):
+        suite.addTest(test)
   return suite