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

mojo/public/dart/third_party/test/lib/src/runner/runner_suite.dart

+// Copyright (c) 2015, 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 test.runner.runner_suite;
+
+import 'dart:async';
+
+import 'package:async/async.dart';
+
+import '../backend/metadata.dart';
+import '../backend/operating_system.dart';
+import '../backend/suite.dart';
+import '../backend/test.dart';
+import '../backend/test_platform.dart';
+import '../utils.dart';
+import 'environment.dart';
+
+/// A suite produced and consumed by the test runner that has runner-specific
+/// logic and lifecycle management.
+///
+/// This is separated from [Suite] because the backend library (which will
+/// eventually become its own package) is primarily for test code itself to use,
+/// for which the [RunnerSuite] APIs don't make sense.
+class RunnerSuite extends Suite {
+  final Environment environment;
+
+  /// The memoizer for running [close] exactly once.
+  final _closeMemo = new AsyncMemoizer();
+
+  /// The function to call when the suite is closed.
+  final AsyncFunction _onClose;
+
+  RunnerSuite(this.environment, Iterable<Test> tests, {String path,
+          TestPlatform platform, OperatingSystem os, Metadata metadata,
+          AsyncFunction onClose})
+      : super(tests,
+          path: path, platform: platform, os: os, metadata: metadata),
+        _onClose = onClose;
+
+  RunnerSuite change({String path, Metadata metadata, Iterable<Test> tests}) {
+    if (path == null) path = this.path;
+    if (metadata == null) metadata = this.metadata;
+    if (tests == null) tests = this.tests;
+    return new RunnerSuite(environment, tests, platform: platform, os: os,
+        path: path, metadata: metadata, onClose: close);
+  }
+
+  /// Closes the suite and releases any resources associated with it.
+  Future close() {
+    return _closeMemo.runOnce(() async {
+      if (_onClose != null) await _onClose();
+    });
+  }
+}