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

tests/isolate/nested_spawn2_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 spawn other isolates and
 // that the nested isolates can communicate with the main once the spawner has
 // disappeared.
 
-#library('NestedSpawn2Test');
-#import("dart:isolate");
-#import('../../pkg/unittest/unittest.dart');
+library NestedSpawn2Test;
+import 'dart:isolate';
+import '../../pkg/unittest/lib/unittest.dart';
 
 void isolateA() {
   port.receive((msg, replyTo) {
-    Expect.equals("launch nested!", msg);
+    expect(msg, "launch nested!");
     SendPort p = spawnFunction(isolateB);
     p.send(replyTo, null);
     port.close();
   });
 }
 
 String msg0 = "0 there?";
 String msg1 = "1 Yes.";
 String msg2 = "2 great. Think the other one is already dead?";
 String msg3 = "3 Give him some time.";
 String msg4 = "4 now?";
 String msg5 = "5 Now.";
 String msg6 = "6 Great. Bye";
 
 void _call(SendPort p, msg, void onreceive(m, replyTo)) {
   final replyTo = new ReceivePort();
   p.send(msg, replyTo.toSendPort());
   replyTo.receive((m, r) {
     replyTo.close();
     onreceive(m, r);
   });
 }
 
 void isolateB() {
   port.receive((mainPort, replyTo) {
     port.close();
     // Do a little ping-pong dance to give the intermediate isolate
     // time to die.
     _call(mainPort, msg0, ((msg, replyTo) {
-      Expect.equals("1", msg[0]);
+      expect(msg[0], "1");
       _call(replyTo, msg2, ((msg, replyTo) {
-        Expect.equals("3", msg[0]);
+        expect(msg[0], "3");
         _call(replyTo, msg4, ((msg, replyTo) {
-          Expect.equals("5", msg[0]);
+          expect(msg[0], "5");
           replyTo.send(msg6, null);
         }));
       }));
     }));
   });
 }
 
 main() {
   test("spawned isolate can spawn other isolates", () {
     SendPort port = spawnFunction(isolateA);
     _call(port, "launch nested!", expectAsync2((msg, replyTo) {
-      Expect.equals("0", msg[0]);
+      expect(msg[0], "0");
       _call(replyTo, msg1, expectAsync2((msg, replyTo) {
-        Expect.equals("2", msg[0]);
+        expect(msg[0], "2");
         _call(replyTo, msg3, expectAsync2((msg, replyTo) {
-          Expect.equals("4", msg[0]);
+          expect(msg[0], "4");
           _call(replyTo, msg5, expectAsync2((msg, replyTo) {
-            Expect.equals("6", msg[0]);
+            expect(msg[0], "6");
           }));
         }));
       }));
     }));
   });
 }