Move a bunch of src/ files into subdirectories.

lib/src/dart.dart

-// 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 unittest.dart;
-
-import 'dart:async';
-import 'dart:io';
-import 'dart:isolate';
-
-import 'package:path/path.dart' as p;
-
-import 'isolate_wrapper.dart';
-import 'remote_exception.dart';
-
-/// Runs [code] in an isolate.
-///
-/// [code] should be the contents of a Dart entrypoint. It may contain imports;
-/// they will be resolved in the same context as the host isolate. [message] is
-/// passed to the [main] method of the code being run; the caller is responsible
-/// for using this to establish communication with the isolate.
-///
-/// [packageRoot] controls the package root of the isolate. It may be either a
-/// [String] or a [Uri].
-Future<Isolate> runInIsolate(String code, message, {packageRoot}) {
-  // TODO(nweiz): load code from a local server rather than from a file.
-  var dir = Directory.systemTemp.createTempSync().path;
-  var dartPath = p.join(dir, 'runInIsolate.dart');
-  new File(dartPath).writeAsStringSync(code);
-  var port = new ReceivePort();
-  return Isolate.spawn(_isolateBuffer, {
-    'replyTo': port.sendPort,
-    'uri': p.toUri(dartPath).toString(),
-    'packageRoot': packageRoot == null ? null : packageRoot.toString(),
-    'message': message
-  }).then((isolate) {
-    return port.first.then((response) {
-      if (response['type'] != 'error') return isolate;
-      if (supportsIsolateKill) isolate.kill();
-      var asyncError = RemoteException.deserialize(response['error']);
-      return new Future.error(asyncError.error, asyncError.stackTrace);
-    });
-  }).catchError((error) {
-    new Directory(dir).deleteSync(recursive: true);
-    throw error;
-  }).then((isolate) {
-    return new IsolateWrapper(isolate,
-        () => new Directory(dir).deleteSync(recursive: true));
-  });
-}
-
-// TODO(nweiz): remove this when issue 12617 is fixed.
-/// A function used as a buffer between the host isolate and [spawnUri].
-///
-/// [spawnUri] synchronously loads the file and its imports, which can deadlock
-/// the host isolate if there's an HTTP import pointing at a server in the host.
-/// Adding an additional isolate in the middle works around this.
-void _isolateBuffer(message) {
-  var replyTo = message['replyTo'];
-  var packageRoot = message['packageRoot'];
-  if (packageRoot != null) packageRoot = Uri.parse(packageRoot);
-  Isolate.spawnUri(Uri.parse(message['uri']), [], message['message'],
-          packageRoot: packageRoot)
-      .then((_) => replyTo.send({'type': 'success'}))
-      .catchError((error, stackTrace) {
-    replyTo.send({
-      'type': 'error',
-      'error': RemoteException.serialize(error, stackTrace)
-    });
-  });
-}