Prune the old deploy code. This CL does a few changes:

pkg/polymer/lib/src/transform/script_compactor.dart

Index: pkg/polymer/lib/src/transform/script_compactor.dart
diff --git a/pkg/polymer/lib/src/transform/script_compactor.dart b/pkg/polymer/lib/src/transform/script_compactor.dart
index 9c2550aed4cbecb75cbb565d08f3e6457bd1d28a..bcc6c41227fa67348698b5a59f4f193cdf6a2244 100644
--- a/pkg/polymer/lib/src/transform/script_compactor.dart
+++ b/pkg/polymer/lib/src/transform/script_compactor.dart
@@ -28,8 +28,8 @@ import 'common.dart';
  * elements annotated with `@CustomTag`.
  */
 class ScriptCompactor extends Transformer {
-  Future<bool> isPrimary(Asset input) =>
-      new Future.value(input.id.extension == ".html");
+  /** Only run this transformer on .html files. */
+  final String allowedExtensions = ".html";
 
   Future apply(Transform transform) {
     var id = transform.primaryId;
@@ -79,8 +79,8 @@ class ScriptCompactor extends Transformer {
             '<script type="application/dart" src="$filename"></script>');
       if (dartLoaderTag == null) {
         document.body.nodes.add(bootstrapScript);
-        document.body.nodes.add(parseFragment('<script type="text/javascript" '
-            'src="packages/browser/dart.js"></script>'));
+        document.body.nodes.add(parseFragment(
+            '<script src="packages/browser/dart.js"></script>'));
       } else if (dartLoaderTag.parent != document.body) {
         document.body.nodes.add(bootstrapScript);
       } else {