Support disabling unit test batching. Use it for angle_end2end_tests

base/test/launcher/unit_test_launcher.h

Index: base/test/launcher/unit_test_launcher.h
diff --git a/base/test/launcher/unit_test_launcher.h b/base/test/launcher/unit_test_launcher.h
index ca00f1048b2d18dd8566640a3d68d56ec3f70520..edb8d7dee264106321cd614cff806d26f5ba66cf 100644
--- a/base/test/launcher/unit_test_launcher.h
+++ b/base/test/launcher/unit_test_launcher.h
@@ -24,6 +24,19 @@ int LaunchUnitTestsSerially(int argc,
                             char** argv,
                             const RunTestSuiteCallback& run_test_suite);
 
+// Launches unit tests in given test suite. Returns exit code.
+// |default_jobs| is the default number of parallel test jobs.
+// |default_batch_limit| is the default size of test batch
+// (use 0 to disable batching).
+// |use_job_objects| determines whether to use job objects.
+int LaunchUnitTestsWithOptions(
+    int argc,
+    char** argv,
+    int default_jobs,
+    int default_batch_limit,
+    bool use_job_objects,
+    const RunTestSuiteCallback& run_test_suite);
+
 #if defined(OS_WIN)
 // Launches unit tests in given test suite. Returns exit code.
 // |use_job_objects| determines whether to use job objects.