- Add getters for the current packageRoot or packageMap.

tests/standalone/io/http_client_stays_alive_test.dart

Index: tests/standalone/io/http_client_stays_alive_test.dart
diff --git a/tests/standalone/io/http_client_stays_alive_test.dart b/tests/standalone/io/http_client_stays_alive_test.dart
index 64ced6e16352c93fe813a937d9624a722ebdb2fe..614e5b37e61aa49a740ade277670a2926cf026f0 100644
--- a/tests/standalone/io/http_client_stays_alive_test.dart
+++ b/tests/standalone/io/http_client_stays_alive_test.dart
@@ -19,7 +19,7 @@ const SECONDS = 4;
 
 void runServerProcess() {
   asyncStart();
-  HttpServer.bind('127.0.0.1', 0).then((server) {
+  HttpServer.bind('127.0.0.1', 0).then((server) async {
     var url = 'http://127.0.0.1:${server.port}/';
 
     server.idleTimeout = const Duration(hours: 1);
@@ -29,7 +29,7 @@ void runServerProcess() {
     });
 
     var sw = new Stopwatch()..start();
-    var arguments = ['--package-root=${Platform.packageRoot}',
+    var arguments = ['--package-root=${(await Platform.packageRoot).toFilePath()}',
                      '${Platform.script}',
                      url];
     Process.run(Platform.executable, arguments).then((res) {