Remove uses of dart:io Options in dart2js and dartdoc.

sdk/lib/_internal/dartdoc/bin/dartdoc.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.
 
 /**
  * To generate docs for a library, run this script with the path to an
  * entrypoint .dart file, like:
  *
  *     $ dart dartdoc.dart foo.dart
  *
  * This will create a "docs" directory with the docs for your libraries. To
  * create these beautiful docs, dartdoc parses your library and every library
  * it imports (recursively). From each library, it parses all classes and
  * members, finds the associated doc comments and builds crosslinked docs from
  * them.
  */
 library dartdoc;
 
 import 'dart:async';
 import 'dart:io';
 
 import '../lib/dartdoc.dart';
 import '../lib/src/dartdoc/utils.dart';
 import 'package:args/args.dart';
 import 'package:path/path.dart' as path;
 
 /**
  * Run this from the `lib/_internal/dartdoc` directory.
  */
-main() {
-  mainWithOptions(new Options());
-}
-
-/**
- * We use this to include dartdoc in a single snapshot with dart2js.
- * (They share 90% of the code)
- */
-mainWithOptions(Options options) {
+main(List<String> arguments) {
   // Need this because ArgParser.getUsage doesn't show command invocation.
   final USAGE = 'Usage dartdoc [options] <entrypoint(s)>\n[options] include:';
 
-  final args = options.arguments;
-
   final dartdoc = new Dartdoc();
 
   final argParser = new ArgParser();
 
   String libPath = path.join(scriptDir, '..', '..', '..', '..');
 
   String packageRoot;
 
   argParser.addFlag('no-code',
       help: 'Do not include source code in the documentation.',
@@ skipping 136 matching lines @@
   argParser.addOption('pkg',
       help: 'Deprecated: same as --package-root.',
       callback: (packageDir) {
         if(packageDir != null) {
           packageRoot = packageDir;
         }
       });
 
   dartdoc.dartdocPath = path.join(libPath, 'lib', '_internal', 'dartdoc');
 
-  if (args.isEmpty) {
+  if (arguments.isEmpty) {
     print('No arguments provided.');
     print(USAGE);
     print(argParser.getUsage());
     exit(1);
   }
 
   final entrypoints = <Uri>[];
   try {
-    final option = argParser.parse(args, allowTrailingOptions: true);
+    final option = argParser.parse(arguments, allowTrailingOptions: true);
 
     // This checks to see if the root of all entrypoints is the same.
     // If it is not, then we display a warning, as package imports might fail.
     var entrypointRoot;
     for (final entrypoint in option.rest) {
       var uri = Uri.parse(entrypoint);
 
       // If it looks like it was a file path (no scheme, or a one letter scheme
       // which is likely a drive letter on Windows), turn it into a file URL.
       if (uri.scheme == '' || uri.scheme.length == 1) {
@@ skipping 67 matching lines @@
   // If there is not, then check if the entrypoint is somewhere in a `lib`
   // directory.
   var parts = path.split(path.dirname(script));
   var libDir = parts.lastIndexOf('lib');
   if (libDir > 0) {
     return path.join(path.joinAll(parts.take(libDir)), 'packages');
   } else {
     return null;
   }
 }