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

pkg/polymer/lib/src/css_emitters.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.
 
 library polymer.src.css_emitters;
 
 import 'package:csslib/visitor.dart' show Visitor, CssPrinter, ElementSelector,
        UriTerm, Selector, HostDirective, SimpleSelectorSequence, StyleSheet;
 
 import 'info.dart';
-import 'utils.dart';
 
 
 /** Emit the contents of the style tag outside of a component. */
 String emitStyleSheet(StyleSheet ss, FileInfo file) =>
   (new _CssEmitter(file.components.keys.toSet())
       ..visitTree(ss, pretty: true)).toString();
 
 /** Emit a component's style tag content emulating scoped css. */
 String emitComponentStyleSheet(StyleSheet ss, String tagName) =>
     (new _ComponentCssEmitter(tagName)..visitTree(ss, pretty: true)).toString();
@@ skipping 90 matching lines @@
   void visitHostDirective(HostDirective node) {
     _inHostDirective = true;
     emit('/* @host */');
     for (var ruleset in node.rulesets) {
       ruleset.visit(this);
     }
     _inHostDirective = false;
     emit('/* end of @host */\n');
   }
 }