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

mojo/public/dart/third_party/shelf/test/test_util.dart

+// Copyright (c) 2014, 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 shelf.test_util;
+
+import 'dart:async';
+
+import 'package:shelf/shelf.dart';
+
+// "hello,"
+const HELLO_BYTES = const [104, 101, 108, 108, 111, 44];
+
+// " world"
+const WORLD_BYTES = const [32, 119, 111, 114, 108, 100];
+
+/// A simple, synchronous handler for [Request].
+///
+/// By default, replies with a status code 200, empty headers, and
+/// `Hello from ${request.url.path}`.
+Response syncHandler(Request request,
+    {int statusCode, Map<String, String> headers}) {
+  if (statusCode == null) statusCode = 200;
+  return new Response(statusCode,
+      headers: headers, body: 'Hello from ${request.requestedUri.path}');
+}
+
+/// Calls [syncHandler] and wraps the response in a [Future].
+Future<Response> asyncHandler(Request request) =>
+    new Future(() => syncHandler(request));
+
+/// Makes a simple GET request to [handler] and returns the result.
+Future<Response> makeSimpleRequest(Handler handler) =>
+    new Future.sync(() => handler(_request));
+
+final _request = new Request('GET', LOCALHOST_URI);
+
+final LOCALHOST_URI = Uri.parse('http://localhost/');