Unbreak local browser testing.

tools/testing/dart/http_server.dart

Index: tools/testing/dart/http_server.dart
diff --git a/tools/testing/dart/http_server.dart b/tools/testing/dart/http_server.dart
index db2d04642c28395ccf0eaf0b6eba7ebd8aae325e..dcc37a6dbb03dba3abc1257d60c58fa882b6e7f6 100644
--- a/tools/testing/dart/http_server.dart
+++ b/tools/testing/dart/http_server.dart
@@ -7,7 +7,53 @@ library http_server;
 import 'dart:io';
 import 'dart:isolate';
 import 'test_suite.dart';  // For TestUtils.
+// TODO(efortuna): Rewrite to not use the args library and simply take an
+// expected number of arguments, so test.dart doesn't rely on the args library?
+// See discussion on https://codereview.chromium.org/11931025/.
+import 'vendored_pkg/args/args.dart';
 
+main() {
+  /** Convenience method for local testing. */
+  var parser = new ArgParser();
+  parser.addOption('port', abbr: 'p',
+      help: 'The main server port we wish to respond to requests.',
+      defaultsTo: '0');
+  parser.addOption('crossOriginPort', abbr: 'c',
+      help: 'A different port that accepts request from the main server port.',
+      defaultsTo: '0');
+  parser.addOption('mode', abbr: 'm', help: 'Testing mode.',
+      defaultsTo: 'release');
+  parser.addOption('arch', abbr: 'a', help: 'Testing architecture.',
+      defaultsTo: 'ia32');
+  parser.addFlag('help', abbr: 'h', negatable: false,
+      help: 'Print this usage information.');
+  var args = parser.parse(new Options().arguments);
+  if (args['help']) {
+    print(parser.getUsage());
+  } else {
+    // Pretend we're running test.dart so that TestUtils doesn't get confused
+    // about the "current directory." This is only used if we're trying to run
+    // this file independently for local testing.
+    TestUtils.testScriptPath = new Path(new Options().script)
+        .directoryPath
+        .join(new Path('../../test.dart'))
+        .canonicalize()
+        .toNativePath();
+    TestingServerRunner.setPackageRootDir({'mode': args['mode'],
+        'arch': args['arch'], 'system': Platform.operatingSystem,
+        'build_directory': ''});
+
+    TestingServerRunner.startHttpServer('127.0.0.1',
+        port: int.parse(args['port']));
+    print('Server listening on port '
+          '${TestingServerRunner.serverList[0].port}.');
+    TestingServerRunner.startHttpServer('127.0.0.1',
+        allowedPort: TestingServerRunner.serverList[0].port, port:
+        int.parse(args['crossOriginPort']));
+    print(
+        'Server listening on port ${TestingServerRunner.serverList[1].port}.');
+  }
+}
 /**
  * Runs a set of servers that are initialized specifically for the needs of our
  * test framework, such as dealing with package-root.