Convert ContextManager to recursively watch analysis roots.

pkg/analysis_server/test/context_manager_test.dart

Index: pkg/analysis_server/test/context_manager_test.dart
diff --git a/pkg/analysis_server/test/context_manager_test.dart b/pkg/analysis_server/test/context_manager_test.dart
index 09f6ae03964bc87106bd064c606fc92306b1debc..b8f2b6c6455531b9781a8256c1237c960141fc4e 100644
--- a/pkg/analysis_server/test/context_manager_test.dart
+++ b/pkg/analysis_server/test/context_manager_test.dart
@@ -1347,34 +1347,6 @@ analyzer:
     });
   }
 
-  test_watch_modifyPackageMapDependency_outsideProject() {
-    // create a dependency file
-    String dependencyPath = '/my/other/dep';
-    resourceProvider.newFile(dependencyPath, 'contents');
-    packageMapProvider.dependencies.add(dependencyPath);
-    // create a Dart file
-    String dartFilePath = posix.join(projPath, 'main.dart');
-    resourceProvider.newFile(dartFilePath, 'contents');
-    // the created context has the expected empty package map
-    manager.setRoots(<String>[projPath], <String>[], <String, String>{});
-    _checkPackageMap(projPath, isEmpty);
-    // configure package map
-    String packagePath = '/package/foo';
-    resourceProvider.newFolder(packagePath);
-    packageMapProvider.packageMap = {'foo': projPath};
-    // Changing a .dart file in the project shouldn't cause a new
-    // package map to be picked up.
-    resourceProvider.modifyFile(dartFilePath, 'new contents');
-    return pumpEventQueue().then((_) {
-      _checkPackageMap(projPath, isEmpty);
-      // However, changing the package map dependency should.
-      resourceProvider.modifyFile(dependencyPath, 'new contents');
-      return pumpEventQueue().then((_) {
-        _checkPackageMap(projPath, equals(packageMapProvider.packageMap));
-      });
-    });
-  }
-
   test_watch_modifyPackagespec() {
     String packagesPath = '$projPath/.packages';
     String filePath = '$projPath/bin/main.dart';