Use memory compiler in compiler_helper.dart.

tests/compiler/dart2js/analyze_helper.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 analyze_helper;
 
 import 'dart:async';
 import 'dart:io';
 import 'package:compiler/compiler.dart' as api;
 import 'package:compiler/src/apiimpl.dart';
+import 'package:compiler/src/commandline_options.dart';
 import 'package:compiler/src/diagnostics/messages.dart' show
     Message;
 import 'package:compiler/src/filenames.dart';
 import 'package:compiler/src/source_file_provider.dart';
 import 'package:compiler/src/util/uri_extras.dart';
 
 /**
  * Map of whitelisted warnings and errors.
  *
  * Only add a whitelisting together with a bug report to dartbug.com and add
@@ skipping 127 matching lines @@
 ===
 
 
 """);
 
   var libraryRoot = currentDirectory.resolve('sdk/');
   var packageRoot =
       currentDirectory.resolveUri(new Uri.file('${Platform.packageRoot}/'));
   var provider = new CompilerSourceFileProvider();
   var handler = new CollectingDiagnosticHandler(whiteList, provider);
-  var options = <String>['--analyze-only', '--categories=Client,Server',
-    '--show-package-warnings'];
-  if (analyzeAll) options.add('--analyze-all');
+  var options = <String>[Flags.analyzeOnly, '--categories=Client,Server',
+      Flags.showPackageWarnings];
+  if (analyzeAll) options.add(Flags.analyzeAll);
   var compiler = new Compiler(
       provider,
       null,
       handler,
       libraryRoot,
       packageRoot,
       options,
       {});
   String MESSAGE = """
 
@@ skipping 17 matching lines @@
       exit(1);
     }
   }
   if (analyzeAll) {
     compiler.librariesToAnalyzeWhenRun = uriList;
     return compiler.run(null).then(onCompletion);
   } else {
     return compiler.run(uriList.single).then(onCompletion);
   }
 }