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

mojo/public/dart/third_party/unittest/lib/src/group_context.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 unittest.group_context;
+
+import 'dart:async';
+
+import '../unittest.dart';
+
+/// Setup and teardown functions for a group and its parents, the latter
+/// for chaining.
+class GroupContext {
+  /// The parent context, or `null`.
+  final GroupContext parent;
+
+  /// Whether this is the root context.
+  bool get isRoot => parent == null;
+
+  /// Description text of the current test group.
+  final String _name;
+
+  /// The set-up function called before each test in a group.
+  Function get testSetUp => _testSetUp;
+  Function _testSetUp;
+
+  set testSetUp(Function setUp) {
+    if (parent == null || parent.testSetUp == null) {
+      _testSetUp = setUp;
+      return;
+    }
+
+    _testSetUp = () {
+      var f = parent.testSetUp();
+      if (f is Future) {
+        return f.then((_) => setUp());
+      } else {
+        return setUp();
+      }
+    };
+  }
+
+  /// The tear-down function called after each test in a group.
+  Function get testTearDown => _testTearDown;
+  Function _testTearDown;
+
+  set testTearDown(Function tearDown) {
+    if (parent == null || parent.testTearDown == null) {
+      _testTearDown = tearDown;
+      return;
+    }
+
+    _testTearDown = () {
+      var f = tearDown();
+      if (f is Future) {
+        return f.then((_) => parent.testTearDown());
+      } else {
+        return parent.testTearDown();
+      }
+    };
+  }
+
+  /// Returns the fully-qualified name of this context.
+  String get fullName =>
+      (isRoot || parent.isRoot) ? _name : "${parent.fullName}$groupSep$_name";
+
+  GroupContext.root()
+      : parent = null,
+        _name = '';
+
+  GroupContext(this.parent, this._name) {
+    _testSetUp = parent.testSetUp;
+    _testTearDown = parent.testTearDown;
+  }
+}