GTTF: Add a basic new unit test launcher.

base/test/unit_test_launcher_ios.cc

Index: base/test/unit_test_launcher_ios.cc
diff --git a/base/test/unit_test_launcher_ios.cc b/base/test/unit_test_launcher_ios.cc
new file mode 100644
index 0000000000000000000000000000000000000000..9709a705042d05610a5ea441cfae4010f414e784
--- /dev/null
+++ b/base/test/unit_test_launcher_ios.cc
@@ -0,0 +1,17 @@
+// Copyright 2013 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/unit_test_launcher.h"
+
+namespace base {
+
+int LaunchUnitTests(int argc,
+                    char** argv,
+                    const RunTestSuiteCallback& run_test_suite) {
+  // Stub implementation - iOS doesn't support features we need for
+  // the full test launcher (e.g. process_util).
+  return run_test_suite.Run();
+}
+
+}  // namespace base