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

samples/tests/samples/swarm/swarm_test.dart

Index: samples/tests/samples/swarm/swarm_test.dart
===================================================================
--- samples/tests/samples/swarm/swarm_test.dart	(revision 14440)
+++ samples/tests/samples/swarm/swarm_test.dart	(working copy)
@@ -2,15 +2,15 @@
 // 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('swarm_tests');
+library swarm_tests;
 
-#import('dart:html');
-#import('../../../swarm/swarmlib.dart');
-#import('../../../ui_lib/base/base.dart');
-#import('../../../ui_lib/view/view.dart');
-#import('../../../ui_lib/util/utilslib.dart');
-#import('../../../../pkg/unittest/unittest.dart');
-#import('../../../../pkg/unittest/html_config.dart');
+import 'dart:html';
+import '../../../swarm/swarmlib.dart';
+import '../../../ui_lib/base/base.dart';
+import '../../../ui_lib/view/view.dart';
+import '../../../ui_lib/util/utilslib.dart';
+import '../../../../pkg/unittest/lib/unittest.dart';
+import '../../../../pkg/unittest/lib/html_config.dart';
 
 // TODO(jmesserly): these would probably be easier to debug if they were written
 // in the WebKit layout test style, so we could easy compare that the DOM is