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

pkg/polymer/lib/src/compiler_options.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.
-
-library polymer.src.compiler_options;
-
-import 'package:args/args.dart';
-
-class CompilerOptions {
-  /** Report warnings as errors. */
-  final bool warningsAsErrors;
-
-  /** True to show informational messages. The `--verbose` flag. */
-  final bool verbose;
-
-  /** Remove any generated files. */
-  final bool clean;
-
-  /** Whether to use colors to print messages on the terminal. */
-  final bool useColors;
-
-  /** Force mangling any generated name (even when --out is provided). */
-  final bool forceMangle;
-
-  /** Generate component's dart code, but not the main entry point file. */
-  final bool componentsOnly;
-
-  /** File to process by the compiler. */
-  String inputFile;
-
-  /** Directory where all sources are found. */
-  final String baseDir;
-
-  /** Directory where all output will be generated. */
-  final String outputDir;
-
-  /** Directory where to look for 'package:' imports. */
-  final String packageRoot;
-
-  /**
-   * Adjust resource URLs in the output HTML to point back to the original
-   * location in the file system. Commonly this is enabled during development,
-   * but disabled for deployment.
-   */
-  final bool rewriteUrls;
-
-  /**
-   * Whether to print error messages using the json format understood by the
-   * Dart editor.
-   */
-  final bool jsonFormat;
-
-  /** Emulate scoped styles using a CSS polyfill. */
-  final bool emulateScopedCss;
-
-  /** Use CSS file for CSS Reset. */
-  final String resetCssFile;
-
-  // We could make this faster, if it ever matters.
-  factory CompilerOptions() => parse(['']);
-
-  CompilerOptions.fromArgs(ArgResults args)
-    : warningsAsErrors = args['warnings_as_errors'],
-      verbose = args['verbose'],
-      clean = args['clean'],
-      useColors = args['colors'],
-      baseDir = args['basedir'],
-      outputDir = args['out'],
-      packageRoot = args['package-root'],
-      rewriteUrls = args['rewrite-urls'],
-      forceMangle = args['unique_output_filenames'],
-      jsonFormat = args['json_format'],
-      componentsOnly = args['components_only'],
-      emulateScopedCss = args['scoped-css'],
-      resetCssFile = args['css-reset'],
-      inputFile = args.rest.length > 0 ? args.rest[0] : null;
-
-  /**
-   * Returns the compiler options parsed from [arguments]. Set [checkUsage] to
-   * false to suppress checking of correct usage or printing help messages.
-   */
-  // TODO(sigmund): convert all flags to use dashes instead of underscores
-  static CompilerOptions parse(List<String> arguments,
-      {bool checkUsage: true}) {
-    var parser = new ArgParser()
-      ..addFlag('verbose', abbr: 'v')
-      ..addFlag('clean', help: 'Remove all generated files',
-          defaultsTo: false, negatable: false)
-      ..addFlag('warnings_as_errors', abbr: 'e',
-          help: 'Warnings handled as errors',
-          defaultsTo: false, negatable: false)
-      ..addFlag('colors', help: 'Display errors/warnings in colored text',
-          defaultsTo: true)
-      ..addFlag('rewrite-urls',
-          help: 'Adjust every resource url to point to the original location in'
-          ' the filesystem.\nThis on by default during development and can be'
-          ' disabled to make the generated code easier to deploy.',
-          defaultsTo: true)
-      ..addFlag('unique_output_filenames', abbr: 'u',
-          help: 'Use unique names for all generated files, so they will not '
-                'have the\nsame name as your input files, even if they are in a'
-                ' different directory',
-          defaultsTo: false, negatable: false)
-      ..addFlag('json_format',
-          help: 'Print error messsages in a json format easy to parse by tools,'
-                ' such as the Dart editor',
-          defaultsTo: false, negatable: false)
-      ..addFlag('components_only',
-          help: 'Generate only the code for component classes, do not generate '
-                'HTML files or the main bootstrap code.',
-          defaultsTo: false, negatable: false)
-      ..addFlag('scoped-css', help: 'Emulate scoped styles with CSS polyfill',
-          defaultsTo: false)
-      ..addOption('css-reset', abbr: 'r', help: 'CSS file used to reset CSS')
-      // TODO(sigmund): remove this flag 
-      ..addFlag('deploy', help: '(deprecated) currently a noop',
-          defaultsTo: false, negatable: false)
-      ..addOption('out', abbr: 'o', help: 'Directory where to generate files'
-          ' (defaults to the same directory as the source file)')
-      ..addOption('basedir', help: 'Base directory where to find all source '
-          'files (defaults to the source file\'s directory)')
-      ..addOption('package-root', help: 'Where to find "package:" imports'
-          '(defaults to the "packages/" subdirectory next to the source file)')
-      ..addFlag('help', abbr: 'h', help: 'Displays this help message',
-          defaultsTo: false, negatable: false);
-    try {
-      var results = parser.parse(arguments);
-      if (checkUsage && (results['help'] || results.rest.length == 0)) {
-        showUsage(parser);
-        return null;
-      }
-      return new CompilerOptions.fromArgs(results);
-    } on FormatException catch (e) {
-      print(e.message);
-      showUsage(parser);
-      return null;
-    }
-  }
-
-  static showUsage(parser) {
-    print('Usage: dwc [options...] input.html');
-    print(parser.getUsage());
-  }
-}