Restructure pkg/unittest and pkg/webdriver to follow the pub conventions.

tests/isolate/cross_isolate_message_test.dart

 // Copyright (c) 2012, 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.
 
 // Dart test program for testing that isolates can communicate to isolates
 // other than the main isolate.
 
-#library('CrossIsolateMessageTest');
-#import('dart:isolate');
-#import('../../pkg/unittest/unittest.dart');
+library CrossIsolateMessageTest;
+import 'dart:isolate';
+import '../../pkg/unittest/lib/unittest.dart';
 
 void crossIsolate1() {
   port.receive((msg, replyTo) {
     SendPort otherIsolate = msg;
     ReceivePort receivePort = new ReceivePort();
     receivePort.receive((msg, replyTo) {
       otherIsolate.send(msg + 58, null);  // 100.
       receivePort.close();
     });
     replyTo.send(['ready', receivePort.toSendPort()]);
@@ skipping 16 matching lines @@
   });
 }
 
 main() {
   test("share port, and send message cross isolates ", () {
     SendPort port1 = spawnFunction(crossIsolate1);
     SendPort port2 = spawnFunction(crossIsolate2);
     // Create a new receive port and send it to isolate2.
     ReceivePort myPort = new ReceivePort();
     port2.call(myPort.toSendPort()).then(expectAsync1((msg) {
-      Expect.equals("ready", msg[0]);
+      expect(msg[0], "ready");
       // Send port of isolate2 to isolate1.
       port1.call(msg[1]).then(expectAsync1((msg) {
-        Expect.equals("ready", msg[0]);
+        expect(msg[0], "ready");
         myPort.receive(expectAsync2((msg, replyTo) {
-          Expect.equals(499, msg);
+          expect(msg, 499);
           myPort.close();
         }));
         msg[1].send(42, null);
       }));
     }));
   });
 }