Bring back initPolymer, allow boot.js only if using "polymer_experimental.html".

pkg/polymer/e2e_test/canonicalization/test/deploy_common.dart

Index: pkg/polymer/e2e_test/canonicalization/test/deploy_common.dart
diff --git a/pkg/polymer/example/canonicalization/test/common.dart b/pkg/polymer/e2e_test/canonicalization/test/deploy_common.dart
similarity index 69%
rename from pkg/polymer/example/canonicalization/test/common.dart
rename to pkg/polymer/e2e_test/canonicalization/test/deploy_common.dart
index 9c0c153626a0ad9e8532693842fa575221e960ff..ee5a947b80f5773a2a950735220d4d473f5e9442 100644
--- a/pkg/polymer/example/canonicalization/test/common.dart
+++ b/pkg/polymer/e2e_test/canonicalization/test/deploy_common.dart
@@ -3,19 +3,20 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Tests how canonicalization works when using the deployed app.
-library canonicalization.test.common;
+library canonicalization.test.deploy_common;
 
 import 'package:unittest/unittest.dart';
 import 'package:unittest/html_config.dart';
 import 'package:polymer/polymer.dart';
 
-import 'package:canonicalization/a.dart';
-import 'packages/canonicalization/b.dart';
-import 'package:canonicalization/c.dart';
-import 'package:canonicalization/d.dart' as d1;
-import 'packages/canonicalization/d.dart' as d2;
+import 'package:canonicalization/a.dart' show a;
+import 'packages/canonicalization/b.dart' show b;
+import 'package:canonicalization/c.dart' show c;
+import 'package:canonicalization/d.dart' as d1 show d;
+import 'packages/canonicalization/d.dart' as d2 show d;
 
-tests() {
+main() {
+  initPolymer();
   useHtmlConfiguration();
 
   setUp(() => Polymer.onReady);
@@ -26,10 +27,9 @@ tests() {
 
     // We shouldn't be using 'packages/' above, so that's ok.
     expect(b, 0, reason:
-      'we pick the "package:" url as the canonical url for script tags.');
+        'we pick 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');
-
     expect(d2.d, 0, reason: 'both a and b are loaded using package: urls');
   });
 }