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

tests/html/typed_arrays_dataview_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('typed_arrays_dataview_test');
-#import('../../pkg/unittest/unittest.dart');
-#import('../../pkg/unittest/html_config.dart');
-#import('dart:html');
+library typed_arrays_dataview_test;
+import '../../pkg/unittest/lib/unittest.dart';
+import '../../pkg/unittest/lib/html_config.dart';
+import 'dart:html';
 
 main() {
   useHtmlConfiguration();
 
   test('access8', () {
       var a1 = new Uint8Array.fromList([0,0,3,255,0,0,0,0,0,0]);
 
       var dv = new DataView(a1.buffer, 2, 6);
 
       expect(dv.getInt8(0), equals(3));
@@ skipping 38 matching lines @@
       expect(dv.getInt32(0), equals(1023));
       expect(dv.getInt32(0, littleEndian: false), equals(1023));
       expect(dv.getInt32(0, littleEndian: true), equals(-0xFD0000));
 
       expect(dv.getUint32(0), equals(1023));
       expect(dv.getUint32(0, littleEndian: false), equals(1023));
       expect(dv.getUint32(0, littleEndian: true), equals(0xFF030000));
   });
 
 }