Move file_system libraries into 'analyzer'.

pkg/analysis_server/test/domain_analysis_test.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 test.domain.analysis;
 
 import 'dart:async';
 
+import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/computer/element.dart';
 import 'package:analysis_server/src/constants.dart';
 import 'package:analysis_server/src/domain_analysis.dart';
 import 'package:analysis_server/src/protocol.dart';
-import 'package:analysis_server/src/resource.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:path/path.dart';
 import 'package:unittest/unittest.dart';
 
 import 'mocks.dart';
 import 'analysis_abstract.dart';
 import 'reflective_tests.dart';
 
 
 main() {
@@ skipping 600 matching lines @@
       };
       resourceProvider.modifyFile(pkgDependency, 'new contents');
       // Let the server time to notice the file has changed, then let
       // analysis omplete.  There should now be no error.
       return pumpEventQueue().then((_) => waitForTasksFinished()).then((_) {
         expect(filesErrors[testFile], isEmpty);
       });
     });
   }
 }