Stop running pub get at gclient sync time and fix build bugs

mojo/public/dart/third_party/unittest/test/returning_future_using_runasync_test.dart

Index: mojo/public/dart/third_party/unittest/test/returning_future_using_runasync_test.dart
diff --git a/mojo/public/dart/third_party/unittest/test/returning_future_using_runasync_test.dart b/mojo/public/dart/third_party/unittest/test/returning_future_using_runasync_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..3ae13c4d11e2374fa0d808ff5ad221b222d7c764
--- /dev/null
+++ b/mojo/public/dart/third_party/unittest/test/returning_future_using_runasync_test.dart
@@ -0,0 +1,87 @@
+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+library unittest.returning_future_using_runasync_test;
+
+import 'dart:async';
+
+import 'package:metatest/metatest.dart';
+import 'package:unittest/unittest.dart';
+
+void main() => initTests(_test);
+
+void _test(message) {
+  initMetatest(message);
+
+  expectTestResults('test returning future using scheduleMicrotask', () {
+    test("successful", () {
+      return new Future.sync(() {
+        scheduleMicrotask(() {
+          expect(true, true);
+        });
+      });
+    });
+    test("fail1", () {
+      var callback = expectAsync(() {});
+      return new Future.sync(() {
+        scheduleMicrotask(() {
+          expect(true, false);
+          callback();
+        });
+      });
+    });
+    test('error1', () {
+      var callback = expectAsync(() {});
+      var excesscallback = expectAsync(() {});
+      return new Future.sync(() {
+        scheduleMicrotask(() {
+          excesscallback();
+          excesscallback();
+          callback();
+        });
+      });
+    });
+    test("fail2", () {
+      var callback = expectAsync(() {});
+      return new Future.sync(() {
+        scheduleMicrotask(() {
+          fail('failure');
+          callback();
+        });
+      });
+    });
+    test('error2', () {
+      var callback = expectAsync(() {});
+      var excesscallback = expectAsync(() {});
+      return new Future.sync(() {
+        scheduleMicrotask(() {
+          excesscallback();
+          excesscallback();
+          excesscallback();
+          callback();
+        });
+      });
+    });
+    test('foo6', () {});
+  }, [
+    {'description': 'successful', 'result': 'pass',},
+    {
+      'description': 'fail1',
+      'message': 'Expected: <false>\n' '  Actual: <true>\n' '',
+      'result': 'fail',
+    },
+    {
+      'description': 'error1',
+      'message': 'Callback called more times than expected (1).',
+      'result': 'fail',
+    },
+    {'description': 'fail2', 'message': 'failure', 'result': 'fail',},
+    {
+      'description': 'error2',
+      'message': 'Callback called more times than expected (1).',
+      'result': 'fail',
+    },
+    {'description': 'foo6', 'result': 'pass',}
+  ]);
+}