fixes #219, able to compile multiple entry points

test/dependency_graph_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 dev_compiler.test.dependency_graph_test;
 
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:analyzer/src/generated/source.dart';
+import 'package:path/path.dart' as path;
 import 'package:test/test.dart';
 
 import 'package:dev_compiler/src/analysis_context.dart';
+import 'package:dev_compiler/src/compiler.dart';
 import 'package:dev_compiler/src/options.dart';
-import 'package:dev_compiler/src/dependency_graph.dart';
 import 'package:dev_compiler/src/report.dart';
-import 'package:dev_compiler/src/testing.dart';
-import 'package:path/path.dart' as path;
+import 'package:dev_compiler/src/server/dependency_graph.dart';
+
+import 'testing.dart';
 
 void main() {
   var options = new CompilerOptions(
       runtimeDir: '/dev_compiler_runtime/',
       sourceOptions: new SourceResolverOptions(useMockSdk: true));
   MemoryResourceProvider testResourceProvider;
   ResourceUriResolver testUriResolver;
   var context;
   var graph;
 
@@ skipping 1140 matching lines @@
   helper(node);
   return sb.toString();
 }
 
 final runtimeFilesWithoutPath = defaultRuntimeFiles
     .map((f) => f.replaceAll('dart/', ''))
     .toList(growable: false);
 final _RUNTIME_GRAPH = runtimeFilesWithoutPath.map((s) => '|--  $s').join('\n');
 final _RUNTIME_GRAPH_REBUILD =
     runtimeFilesWithoutPath.map((s) => '|--  $s [needs-rebuild]').join('\n');