Prune the old deploy code. This CL does a few changes:

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 'paths.dart' show PathMapper;
 import 'utils.dart';
 
-void rewriteCssUris(PathMapper pathMapper, String cssPath, bool rewriteUrls,
-    StyleSheet styleSheet) {
-  new _UriVisitor(pathMapper, cssPath, rewriteUrls).visitTree(styleSheet);
-}
-
-/** Compute each CSS URI resource relative from the generated CSS file. */
-class _UriVisitor extends Visitor {
-  /**
-   * Relative path from the output css file to the location of the original
-   * css file that contained the URI to each resource.
-   */
-  final String _pathToOriginalCss;
-
-  factory _UriVisitor(PathMapper pathMapper, String cssPath, bool rewriteUrl) {
-    var cssDir = path.dirname(cssPath);
-    var outCssDir = rewriteUrl ? pathMapper.outputDirPath(cssPath)
-        : path.dirname(cssPath);
-    return new _UriVisitor._internal(path.relative(cssDir, from: outCssDir));
-  }
-
-  _UriVisitor._internal(this._pathToOriginalCss);
-
-  void visitUriTerm(UriTerm node) {
-    // Don't touch URIs that have any scheme (http, etc.).
-    var uri = Uri.parse(node.text);
-    if (uri.host != '') return;
-    if (uri.scheme != '' && uri.scheme != 'package') return;
-
-    node.text = pathToUrl(
-        path.normalize(path.join(_pathToOriginalCss, node.text)));
-  }
-}
-
 
 /** 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 89 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');
   }
 }