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

mojo/public/dart/third_party/analyzer/test/src/util/asserts_test.dart

Index: mojo/public/dart/third_party/analyzer/test/src/util/asserts_test.dart
diff --git a/mojo/public/dart/third_party/analyzer/test/src/util/asserts_test.dart b/mojo/public/dart/third_party/analyzer/test/src/util/asserts_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..a504e439c52355a651f12ff724381bb8e24bf053
--- /dev/null
+++ b/mojo/public/dart/third_party/analyzer/test/src/util/asserts_test.dart
@@ -0,0 +1,31 @@
+// 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.src.util.asserts;
+
+import 'package:analyzer/src/util/asserts.dart';
+import 'package:unittest/unittest.dart';
+
+import '../../reflective_tests.dart';
+import '../../utils.dart';
+
+main() {
+  initializeTestEnvironment();
+  runReflectiveTests(AnalysisTaskTest);
+}
+
+@reflectiveTest
+class AnalysisTaskTest {
+  void test_notNull_notNull() {
+    notNull(this);
+  }
+
+  void test_notNull_null_hasDescription() {
+    expect(() => notNull(null, 'desc'), throwsArgumentError);
+  }
+
+  void test_notNull_null_noDescription() {
+    expect(() => notNull(null), throwsArgumentError);
+  }
+}