Move file_system libraries into 'analyzer'.

pkg/analyzer/test/file_system/physical_resource_provider_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.physical.resource.provider;
+library test.physical_file_system;
 
 import 'dart:async';
 import 'dart:io' as io;
 
-import 'package:analysis_server/src/resource.dart';
+import 'package:analyzer/file_system/file_system.dart';
+import 'package:analyzer/file_system/physical_file_system.dart';
 import 'package:analyzer/src/generated/source_io.dart';
 import 'package:path/path.dart';
 import 'package:unittest/unittest.dart';
 import 'package:watcher/watcher.dart';
 
+
+var _isFile = new isInstanceOf<File>();
+var _isFolder = new isInstanceOf<Folder>();
+
+
 main() {
   groupSep = ' | ';
 
   group('PhysicalResourceProvider', () {
       io.Directory tempDirectory;
       String tempPath;
 
       setUp(() {
         tempDirectory = io.Directory.systemTemp.createTempSync('test_resource');
         tempPath = tempDirectory.absolute.path;
@@ skipping 254 matching lines @@
           expect(folder.canonicalizePath('baz'), equals(join(path, 'baz')));
           expect(folder.canonicalizePath(path2), equals(path2));
           expect(folder.canonicalizePath(join('..', 'folder2')), equals(path2));
           expect(folder.canonicalizePath(join(path2, '..', 'folder3')), equals(path3));
           expect(folder.canonicalizePath(join('.', 'baz')), equals(join(path, 'baz')));
           expect(folder.canonicalizePath(join(path2, '.', 'baz')), equals(join(path2, 'baz')));
         });
       });
     });
 }
-
-var _isFile = new isInstanceOf<File>();
-var _isFolder = new isInstanceOf<Folder>();
-var _isMemoryResourceException = new isInstanceOf<MemoryResourceException>();