GTTF: Add command-line switches for number of jobs and batch limit.

base/test/test_switches.cc

 // 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.
 
 #include "base/test/test_switches.h"
 
 // Time (in milliseconds) that the tests should wait before timing out.
 // TODO(phajdan.jr): Clean up the switch names.
 const char switches::kTestLargeTimeout[] = "test-large-timeout";
 
+// Maximum number of tests to run in a single batch.
+const char switches::kTestLauncherBatchLimit[] = "test-launcher-batch-limit";
+
+// Number of parallel test launcher jobs.
+const char switches::kTestLauncherJobs[] = "test-launcher-jobs";
+
 // Path to test results file in our custom test launcher format.
 const char switches::kTestLauncherOutput[] = "test-launcher-output";
 
 // Time (in milliseconds) that the tests should wait before timing out.
 // TODO(phajdan.jr): Clean up the switch names.
 const char switches::kTestTinyTimeout[] = "test-tiny-timeout";
 const char switches::kUiTestActionTimeout[] = "ui-test-action-timeout";
 const char switches::kUiTestActionMaxTimeout[] = "ui-test-action-max-timeout";