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

pkg/intl/test/intl_message_basic_example_test.dart

Index: pkg/intl/test/intl_message_basic_example_test.dart
===================================================================
--- pkg/intl/test/intl_message_basic_example_test.dart	(revision 14313)
+++ pkg/intl/test/intl_message_basic_example_test.dart	(working copy)
@@ -5,13 +5,13 @@
 /**
  * Tests internationalization of messages using the basic example as a template.
  */
-#library('intl_message_test_2');
+library intl_message_test_2;
 
-#import('../lib/date_symbol_data_local.dart');
-#import('../lib/intl.dart');
-#import('../lib/message_lookup_local.dart');
-#import('../example/basic/basic_example.dart');
-#import('../../unittest/unittest.dart');
+import '../lib/date_symbol_data_local.dart';
+import '../lib/intl.dart';
+import '../lib/message_lookup_local.dart';
+import '../example/basic/basic_example.dart';
+import '../../../pkg/unittest/lib/unittest.dart';
 
 List list;
 
@@ -30,4 +30,4 @@
   expect(list[2], "วิ่ง 0:00:00 on วันพฤหัสบดี 1 มกราคม 1970.");
   expect(list[3], "วิ่ง now on today.");
   });
-}
+}