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

tests/html/typed_arrays_1_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.
 
-#library('TypedArrays1Test');
-#import('../../pkg/unittest/unittest.dart');
-#import('../../pkg/unittest/html_config.dart');
-#import('dart:html');
+library TypedArrays1Test;
+import '../../pkg/unittest/lib/unittest.dart';
+import '../../pkg/unittest/lib/html_config.dart';
+import 'dart:html';
 
 main() {
   useHtmlConfiguration();
 
   var isnumList = predicate((x) => x is List<num>, 'is a List<num>');
   var isStringList = predicate((x) => x is List<String>, 'is a List<String>');
 
   test('createByLengthTest', () {
       var a = new Float32Array(10);
       expect(a.length, 10);
@@ skipping 20 matching lines @@
 
   });
 
   test('typeTests', () {
       var a = new Float32Array(10);
       expect(a, isList);
       expect(a, isnumList);
       expect(a, isNot(isStringList));
     });
 }