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

samples/tests/samples/lib/layout/layout_test.dart

 // Copyright (c) 2011, 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('layout_tests');
+library layout_tests;
 
-#import('dart:html');
-#import('../../../../ui_lib/base/base.dart');
-#import('../../../../ui_lib/layout/layout.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 '../../../../ui_lib/base/base.dart';
+import '../../../../ui_lib/layout/layout.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';
 
-#source('grid_layout_demo.dart');
-#source('grid_examples.dart');
-#source('css.dart');
+part 'grid_layout_demo.dart';
+part 'grid_examples.dart';
+part 'css.dart';
 
 // TODO(jmesserly): these tests would be easier to work with if they were WebKit
 // layout tests. The way DumpRenderTree works is exactly what we want for
 // testing layout: run the example and then print the element tree with metrics.
 // The UnitTestSuite wrapper gets in our way here, because you can't "see" the
 // test layout visually when you're debugging.
 // See these links for more info:
 //   http://www.webkit.org/quality/testwriting.html
 //   http://www.w3.org/Style/CSS/Test/guidelines.html
 
@@ skipping 150 matching lines @@
       Expect.equals(values[1], offset.top);
       Expect.equals(values[2], offset.width);
       Expect.equals(values[3], offset.height);
     }));
   }
 }
 
 verifyExample(String example, [Map expected = null]) {
   usingGrid(example, (grid) => verifyGrid(example, expected));
 }