Dart: Reorganize files

mojo/dart/http_load_test/bin/tester.dart

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-library http_load_test;
-
-import 'dart:async';
-import 'dart:convert';
-import 'dart:io';
-
-class Launcher {
-  /// Launch [executable] with [arguments]. Returns a [String] containing
-  /// the standard output from the launched executable.
-  static Future<String> launch(String executable,
-                               List<String> arguments) async {
-    var process = await Process.start(executable, arguments);
-
-    // Completer completes once the child process exits.
-    var completer = new Completer();
-    String output = '';
-    process.stdout.transform(UTF8.decoder)
-                  .transform(new LineSplitter()).listen((line) {
-      output = '$output\n$line';
-      print(line);
-    });
-    process.stderr.transform(UTF8.decoder)
-                  .transform(new LineSplitter()).listen((line) {
-      output = '$output\n$line';
-      print(line);
-    });
-    process.exitCode.then((ec) {
-      output = '$output\nEXIT_CODE=$ec\n';
-      completer.complete(output);
-    });
-    return completer.future;
-  }
-}
-
-main(List<String> args) async {
-  var mojo_shell_executable = args[0];
-  var directory = args[1];
-
-  HttpServer server = await HttpServer.bind('127.0.0.1', 0);
-
-  server.listen((HttpRequest request) async {
-    final String path = request.uri.toFilePath();
-    final File file = new File('${directory}/${path}');
-    if (await file.exists()) {
-      try {
-        await file.openRead().pipe(request.response);
-      } catch (e) {
-        print(e);
-      }
-    } else {
-      request.response.statusCode = HttpStatus.NOT_FOUND;
-      request.response.close();
-    }
-  });
-
-  var launchUrl = 'http://127.0.0.1:${server.port}/lib/main.dart';
-  var output = await Launcher.launch(mojo_shell_executable, [launchUrl]);
-
-  server.close();
-
-  if (output.contains("ERROR")) {
-    throw "test failed.";
-  }
-  if (!output.contains("\nEXIT_CODE=0\n")) {
-    throw "Test failed.";
-  }
-  if (!output.contains("\nPASS")) {
-    throw "Test failed.";
-  }
-}