cleanup to tools/testing/dart

tools/testing/dart/compiler_configuration.dart

 // Copyright (c) 2014, 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 compiler_configuration;
 
 import 'dart:io' show
     Platform;
 
-import 'runtime_configuration.dart' show
-    RuntimeConfiguration;
+import 'lib/command.dart';
+import 'lib/test_information.dart';
+import 'lib/test_utils.dart';
 
-import 'test_runner.dart' show
-    Command,
-    CommandBuilder,
-    CompilationCommand;
-
-import 'test_suite.dart' show
-    TestInformation,
-    TestUtils;
-
-/// Grouping of a command with its expected result.
-class CommandArtifact {
-  final List<Command> commands;
-
-  /// Expected result of running [command].
-  final String filename;
-
-  /// MIME type of [filename].
-  final String mimeType;
-
-  CommandArtifact(this.commands, this.filename, this.mimeType);
-}
+import 'runtime_configuration.dart';
 
 Uri nativeDirectoryToUri(String nativePath) {
   Uri uri = new Uri.file(nativePath);
   String path = uri.path;
   return (path == '' || path.endsWith('/'))
       ? uri
       : Uri.parse('$uri/');
 }
 
 abstract class CompilerConfiguration {
@@ skipping 359 matching lines @@
       // shipped SDK, that is the script is not installed in
       // "$buildDir/dart-sdk/bin/"
       return '$prefix/dartanalyzer_developer$suffix';
     }
     if (useSdk) {
       prefix = '$buildDir/dart-sdk/bin';
     }
     return '$prefix/dartanalyzer$suffix';
   }
 }