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

pkg/logging/test/logging_test.dart

Index: pkg/logging/test/logging_test.dart
===================================================================
--- pkg/logging/test/logging_test.dart	(revision 14313)
+++ pkg/logging/test/logging_test.dart	(working copy)
@@ -3,11 +3,11 @@
 // BSD-style license that can be found in the LICENSE file.
 
 
-#library('logging_test');
+library logging_test;
 
 // TODO(rnystrom): Use "package:" import when test.dart supports it (#4968).
-#import('../lib/logging.dart');
-#import('../../../pkg/unittest/unittest.dart');
+import '../lib/logging.dart';
+import '../../../pkg/unittest/lib/unittest.dart';
 
 main() {
   test('level comparison is a valid comparator', () {