fix imports link rel=stylesheet

pkg/polymer/lib/src/build/code_extractor.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 extracts inlined script code into separate assets. */
 library polymer.src.build.code_extractor;
 
 import 'dart:async';
 
 import 'package:analyzer/src/generated/ast.dart';
@@ skipping 34 matching lines @@
         // Remove empty tags
         if (tag.nodes.length == 0) {
           tag.remove();
           continue;
         }
 
         var filename = path.url.basename(id.path);
         // TODO(sigmund): ensure this filename is unique (dartbug.com/12618).
         tag.attributes['src'] = '$filename.$count.dart';
         var textContent = tag.nodes.first;
-        var code = textContent.value;
+        var code = textContent.text;
         var newId = id.addExtension('.$count.dart');
         if (!_hasLibraryDirective(code)) {
           var libname = path.withoutExtension(newId.path)
               .replaceAll(new RegExp('[-./]'), '_');
           code = "library $libname;\n$code";
         }
         transform.addOutput(new Asset.fromString(newId, code));
         textContent.remove();
         count++;
       }
@@ skipping 10 matching lines @@
   var scanner = new Scanner(null, reader, errorListener);
   var token = scanner.tokenize();
   var unit = new Parser(null, errorListener).parseCompilationUnit(token);
   return unit.directives.any((d) => d is LibraryDirective);
 }
 
 class _ErrorCollector extends AnalysisErrorListener {
   final errors = <AnalysisError>[];
   onError(error) => errors.add(error);
 }