Revert of [Android] Remove old gtest test_runner code.

build/android/test_runner.py

Index: build/android/test_runner.py
diff --git a/build/android/test_runner.py b/build/android/test_runner.py
index e324536713445017247de46d9b85bf80b76d2122..8088ad214db51601008a737897b0219a8d84eb28 100755
--- a/build/android/test_runner.py
+++ b/build/android/test_runner.py
@@ -31,6 +31,9 @@
 from pylib.base import test_dispatcher
 from pylib.base import test_instance_factory
 from pylib.base import test_run_factory
+from pylib.gtest import gtest_config
+from pylib.gtest import setup as gtest_setup
+from pylib.gtest import test_options as gtest_test_options
 from pylib.linker import setup as linker_setup
 from pylib.host_driven import setup as host_driven_setup
 from pylib.instrumentation import setup as instrumentation_setup
@@ -190,10 +193,15 @@
 def AddGTestOptions(parser):
   """Adds gtest options to |parser|."""
 
+  gtest_suites = list(gtest_config.STABLE_TEST_SUITES
+                      + gtest_config.EXPERIMENTAL_TEST_SUITES)
+
   group = parser.add_argument_group('GTest Options')
   group.add_argument('-s', '--suite', dest='suite_name',
                      nargs='+', metavar='SUITE_NAME', required=True,
-                     help='Executable name of the test suite to run.')
+                     help=('Executable name of the test suite to run. '
+                           'Available suites include (but are not limited to): '
+                            '%s' % ', '.join('"%s"' % s for s in gtest_suites)))
   group.add_argument('--gtest_also_run_disabled_tests',
                      '--gtest-also-run-disabled-tests',
                      dest='run_disabled', action='store_true',
@@ -640,6 +648,44 @@
       choices=constants.PYTHON_UNIT_TEST_SUITES.keys(),
       help='Name of the test suite to run.')
   AddCommonOptions(parser)
+
+
+def _RunGTests(args, devices):
+  """Subcommand of RunTestsCommands which runs gtests."""
+  exit_code = 0
+  for suite_name in args.suite_name:
+    # TODO(jbudorick): Either deprecate multi-suite or move its handling down
+    # into the gtest code.
+    gtest_options = gtest_test_options.GTestOptions(
+        args.tool,
+        args.test_filter,
+        args.run_disabled,
+        args.test_arguments,
+        args.timeout,
+        args.isolate_file_path,
+        suite_name,
+        args.app_data_files,
+        args.app_data_file_dir,
+        args.delete_stale_data)
+    runner_factory, tests = gtest_setup.Setup(gtest_options, devices)
+
+    results, test_exit_code = test_dispatcher.RunTests(
+        tests, runner_factory, devices, shard=True, test_timeout=None,
+        num_retries=args.num_retries)
+
+    if test_exit_code and exit_code != constants.ERROR_EXIT_CODE:
+      exit_code = test_exit_code
+
+    report_results.LogFull(
+        results=results,
+        test_type='Unit test',
+        test_package=suite_name,
+        flakiness_server=args.flakiness_dashboard_server)
+
+    if args.json_results_file:
+      json_results.GenerateJsonResultsFile(results, args.json_results_file)
+
+  return exit_code
 
 
 def _RunLinkerTests(args, devices):