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

pkg/polymer/lib/src/transform/script_compactor.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.
 
 /** Transfomer that combines multiple dart script tags into a single one. */
 library polymer.src.transform.script_compactor;
 
 import 'dart:async';
 
 import 'package:barback/barback.dart';
 import 'package:html5lib/parser.dart' show parseFragment;
 import 'package:path/path.dart' as path;
 
 import 'code_extractor.dart'; // import just for documentation.
 import 'common.dart';
 
 /**
  * Combines Dart script tags into a single script tag, and creates a new Dart
  * file that calls the main function of each of the original script tags.
  *
  * This transformer assumes that all script tags point to external files. To
  * support script tags with inlined code, use this transformer after running
  * [InlineCodeExtractor] on an earlier phase.
  *
  * Internally, this transformer will convert each script tag into an import
  * statement to a library, and then uses `initPolymer` (see polymer.dart)  to
  * invoke the main method on each of these libraries and register any polymer
  * elements annotated with `@CustomTag`.
  */
-class ScriptCompactor extends Transformer {
+class ScriptCompactor extends Transformer with PolymerTransformer {
+  final TransformOptions options;
+
+  ScriptCompactor(this.options);
+
   /** Only run on entry point .html files. */
   Future<bool> isPrimary(Asset input) =>
-      new Future.value(isPrimaryHtml(input.id));
+      new Future.value(options.isHtmlEntryPoint(input.id));
 
   Future apply(Transform transform) {
     var id = transform.primaryInput.id;
     var logger = transform.logger;
     return readPrimaryAsHtml(transform).then((document) {
       var libraries = [];
       bool changed = false;
       var dartLoaderTag = null;
       for (var tag in document.queryAll('script')) {
         var src = tag.attributes['src'];
@@ skipping 71 matching lines @@
 
 void main() {
   initPolymer([
 """;
 
 // TODO(sigmund): investigate alternative to get the baseUri (dartbug.com/12612)
 const _mainSuffix = """
     ], currentMirrorSystem().isolate.rootLibrary.uri.toString());
 }
 """;