Implement Search.classMembers() using getFilesDefiningClassMemberName().

pkg/analyzer/test/src/dart/analysis/search_test.dart

 // Copyright (c) 2016, 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.
 
 import 'dart:async';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/standard_resolution_map.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/src/dart/analysis/driver.dart';
@@ skipping 68 matching lines @@
 class B {
   int test = 1;
   int testTwo = 2;
   main() {
     int test = 3;
   }
 }
 ''');
     ClassElement a = _findElement('A');
     ClassElement b = _findElement('B');
-    RegExp regExp = new RegExp(r'^test$');
-    expect(await driver.search.classMembers(regExp),
+    expect(await driver.search.classMembers('test'),
         unorderedEquals([a.methods[0], b.fields[0]]));
   }
 
   test_classMembers_importNotDart() async {
     await _resolveTestUnit('''
 import 'not-dart.txt';
 ''');
-    RegExp regExp = new RegExp(r'^test$');
-    expect(await driver.search.classMembers(regExp), isEmpty);
+    expect(await driver.search.classMembers('test'), isEmpty);
   }
 
   test_searchMemberReferences_qualified_resolved() async {
     await _resolveTestUnit('''
 class C {
   var test;
 }
 main(C c) {
   print(c.test);
   c.test = 1;
@@ skipping 1068 matching lines @@
     List<SearchResult> results = await driver.search.references(element);
     _assertResults(results, expectedMatches);
     expect(results, hasLength(expectedMatches.length));
   }
 
   static void _assertResults(
       List<SearchResult> matches, List<ExpectedResult> expectedMatches) {
     expect(matches, unorderedEquals(expectedMatches));
   }
 }