move extractDefinedVariables from analyzer cli to analyzer

pkg/analyzer_cli/test/options_test.dart

 // Copyright (c) 2015, 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 analyzer_cli.test.options;
 
 import 'dart:io';
 
 import 'package:analyzer_cli/src/driver.dart';
 import 'package:analyzer_cli/src/options.dart';
@@ skipping 136 matching lines @@
       });
 
       test('warningsAreFatal', () {
         CommandLineOptions options = CommandLineOptions
             .parse(['--dart-sdk', '.', '--fatal-warnings', 'foo.dart']);
         expect(options.warningsAreFatal, isTrue);
       });
 
       test('notice unrecognized flags', () {
         expect(
-            () => new CommandLineParser()
-                .parse(['--bar', '--baz', 'foo.dart'], {}),
+            () => new CommandLineParser().parse(['--bar', '--baz', 'foo.dart']),
             throwsA(new isInstanceOf<FormatException>()));
       });
 
       test('ignore unrecognized flags', () {
         CommandLineOptions options = CommandLineOptions.parse([
           '--ignore-unrecognized-flags',
           '--bar',
           '--baz',
           '--dart-sdk',
           '.',
           'foo.dart'
         ]);
         expect(options, isNotNull);
         expect(options.sourceFiles, equals(['foo.dart']));
       });
 
       test('ignore unrecognized options', () {
         CommandLineParser parser =
             new CommandLineParser(alwaysIgnoreUnrecognized: true);
         parser.addOption('optionA');
         parser.addFlag('flagA');
         ArgResults argResults =
-            parser.parse(['--optionA=1', '--optionB=2', '--flagA'], {});
+            parser.parse(['--optionA=1', '--optionB=2', '--flagA']);
         expect(argResults['optionA'], '1');
         expect(argResults['flagA'], isTrue);
       });
 
       test('strong mode', () {
         CommandLineOptions options =
             CommandLineOptions.parse(['--strong', 'foo.dart']);
         expect(options.strongMode, isTrue);
       });
 
@@ skipping 160 matching lines @@
       'package:p/foo.dart|/path/to/p/lib/foo.dart'
     ]);
     expect(options.buildMode, isTrue);
     expect(options.buildSuppressExitCode, isTrue);
   }
 
   void _parse(List<String> args) {
     options = CommandLineOptions.parse(args);
   }
 }