Switch polymer's build.dart to use the new linter. This CL does the following

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

Index: pkg/polymer/lib/src/transform/code_extractor.dart
diff --git a/pkg/polymer/lib/src/transform/code_extractor.dart b/pkg/polymer/lib/src/transform/code_extractor.dart
index a46300ef2f3b4def2f68599eb832e990154d22d7..580f5ac141e923cc8a5da1390bcc0a6cceaa5050 100644
--- a/pkg/polymer/lib/src/transform/code_extractor.dart
+++ b/pkg/polymer/lib/src/transform/code_extractor.dart
@@ -20,7 +20,11 @@ import 'common.dart';
  * Transformer that extracts Dart code inlined in HTML script tags and outputs a
  * separate file for each.
  */
-class InlineCodeExtractor extends Transformer {
+class InlineCodeExtractor extends Transformer with PolymerTransformer {
+  final TransformOptions options;
+
+  InlineCodeExtractor(this.options);
+
   /** Only run this transformer on .html files. */
   final String allowedExtensions = ".html";