Timing hooks to profile linters (#24548).

pkg/analyzer/test/src/task/dart_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 analyzer.test.src.task.dart_test;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
 import 'package:analyzer/dart/ast/visitor.dart';
 import 'package:analyzer/dart/element/element.dart';
@@ skipping 2633 matching lines @@
   visitClassDeclaration(ClassDeclaration node) {
     if (!new RegExp(r'^([_]*)([A-Z]+[a-z0-9]*)+$')
         .hasMatch(node.name.toString())) {
       linter.reporter.reportErrorForNode(_testLintCode, node, []);
     }
   }
 }
 
 class GenerateLintsTaskTest_TestLinter extends Linter {
   @override
+  String get name => 'GenerateLintsTaskTest_TestLinter';
+
+  @override
   AstVisitor getVisitor() => new GenerateLintsTaskTest_AstVisitor(this);
 }
 
 @reflectiveTest
 class InferInstanceMembersInUnitTaskTest extends _AbstractDartTaskTest {
   test_created_resolved_unit() {
     Source source = newSource(
         '/test.dart',
         r'''
 library lib;
@@ skipping 2372 matching lines @@
   /**
    * Fill [errorListener] with [result] errors in the current [task].
    */
   void _fillErrorListener(ResultDescriptor<List<AnalysisError>> result) {
     List<AnalysisError> errors = task.outputs[result];
     expect(errors, isNotNull, reason: result.name);
     errorListener = new GatheringErrorListener();
     errorListener.addAll(errors);
   }
 }