Remove processing of dart code, summary.dart, simplified info.dart

pkg/polymer/lib/dwc.dart

 // Copyright (c) 2012, 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.
 
 /** The entry point to the compiler. Used to implement `bin/dwc.dart`. */
 library dwc;
 
 import 'dart:async';
 import 'dart:io';
 import 'package:logging/logging.dart' show Level;
 
 import 'src/compiler.dart';
-import 'src/file_system.dart';
 import 'src/file_system/console.dart';
-import 'src/files.dart';
 import 'src/messages.dart';
 import 'src/compiler_options.dart';
 import 'src/utils.dart';
 
 void main() {
   run(new Options().arguments).then((result) {
     exit(result.success ? 0 : 1);
   });
 }
 
@@ skipping 25 matching lines @@
     var compiler = new Compiler(new ConsoleFileSystem(), options, messages);
     return compiler.run().then((_) {
       var success = messages.messages.every((m) => m.level != Level.SEVERE);
       var msgs = options.jsonFormat
           ? messages.messages.map((m) => m.toJson())
           : messages.messages.map((m) => m.toString());
       return new AnalysisResults(success, msgs.toList());
     });
   }, printTime: printTime, useColors: options.useColors);
 }