Replace bootstrap logic with 'boot.js', use 'component/dart' mime-type and add

pkg/polymer/example/canonicalization3/test/bad_lib_import_negative_test.dart

 // Copyright (c) 2013, 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.
 
 /// Tests how canonicalization works when using the deployed app.
 library canonicalization.bad_lib_import_negative;
 
 import 'package:unittest/unittest.dart';
 import 'package:unittest/html_config.dart';
 import 'package:polymer/polymer.dart';
 
 import 'package:canonicalization3/a.dart';
 import 'packages/canonicalization3/b.dart';
 import 'package:canonicalization3/c.dart';
 import 'package:canonicalization3/d.dart' as d1;
 import 'packages/canonicalization3/d.dart' as d2;
 
+@initMethod
 main() {
-  initPolymer();
   useHtmlConfiguration();
 
   setUp(() => Polymer.onReady);
 
   test('canonicalization', () {
     // "package:" urls work the same during development and deployment
     expect(a, 1, reason:
       'deploy picks the "package:" url as the canonical url for script tags.');
 
     // relative urls do not. true, we shouldn't be using 'packages/' above, so
     // that's ok.
     expect(b, 0, reason:
       'deploy picks the "package:" url as the canonical url for script tags.');
     expect(c, 2, reason: 'c was always imported with "package:" urls.');
     expect(d1.d, 2, reason: 'both a and b are loaded using package: urls');
 
     // same here
     expect(d2.d, 0, reason: 'both a and b are loaded using package: urls');
   });
 }