Adding Angular's DI package & Dart unittests which test it.

third_party/pkg/di/benchmark/dynamic_injector_benchmark.dart

Index: third_party/pkg/di/benchmark/dynamic_injector_benchmark.dart
diff --git a/third_party/pkg/di/benchmark/dynamic_injector_benchmark.dart b/third_party/pkg/di/benchmark/dynamic_injector_benchmark.dart
new file mode 100644
index 0000000000000000000000000000000000000000..a5fa472f1584fd5f92793094519b732c313a8593
--- /dev/null
+++ b/third_party/pkg/di/benchmark/dynamic_injector_benchmark.dart
@@ -0,0 +1,10 @@
+import 'package:benchmark_harness/benchmark_harness.dart';
+import 'package:di/dynamic_injector.dart';
+
+import 'injector_benchmark_common.dart';
+
+
+main() {
+  new InjectorBenchmark('DynamicInjectorBenchmark',
+      (m) => new DynamicInjector(modules: m)).report();
+}