Move findElementsByName() into shared analyzer/element_search.dart file.

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';
 import 'package:analyzer/src/dart/analysis/search.dart';
 import 'package:analyzer/src/dart/ast/utilities.dart';
 import 'package:analyzer/src/dart/element/member.dart';
+import 'package:analyzer/src/generated/testing/element_search.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
-import '../../../utils.dart';
 import 'base.dart';
 
 main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(SearchTest);
   });
 }
 
 class ExpectedResult {
   final Element enclosingElement;
@@ skipping 1237 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));
   }
 }