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

pkg/analysis_server/test/plugin/protocol_dart_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.
 
 import 'package:analysis_server/plugin/protocol/protocol_dart.dart';
 import 'package:analyzer/dart/ast/ast.dart' as engine;
 import 'package:analyzer/dart/ast/visitor.dart' as engine;
 import 'package:analyzer/dart/element/element.dart' as engine;
 import 'package:analyzer/dart/element/type.dart' as engine;
 import 'package:analyzer/error/error.dart' as engine;
 import 'package:analyzer/src/dart/ast/utilities.dart' as engine;
 import 'package:analyzer/src/dart/element/element.dart' as engine;
 import 'package:analyzer/src/error/codes.dart' as engine;
 import 'package:analyzer/src/generated/source.dart' as engine;
+import 'package:analyzer/src/generated/testing/search.dart';
 import 'package:analyzer_plugin/protocol/protocol_common.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import '../abstract_context.dart';
 
 main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(ElementTest);
     defineReflectiveTests(ElementKindTest);
   });
 }
 
-/**
- * Search the [unit] for the [engine.Element]s with the given [name].
- */
-List<engine.Element> findElementsByName(
-    engine.CompilationUnit unit, String name) {
-  var finder = new _ElementsByNameFinder(name);
-  unit.accept(finder);
-  return finder.elements;
-}
-
 @reflectiveTest
 class ElementKindTest {
   void test_fromEngine() {
     expect(convertElementKind(engine.ElementKind.CLASS), ElementKind.CLASS);
     expect(convertElementKind(engine.ElementKind.COMPILATION_UNIT),
         ElementKind.COMPILATION_UNIT);
     expect(convertElementKind(engine.ElementKind.CONSTRUCTOR),
         ElementKind.CONSTRUCTOR);
     expect(convertElementKind(engine.ElementKind.FIELD), ElementKind.FIELD);
     expect(
@@ skipping 433 matching lines @@
       expect(location.offset, 16);
       expect(location.length, 'mySetter'.length);
       expect(location.startLine, 2);
       expect(location.startColumn, 7);
     }
     expect(element.parameters, '(String x)');
     expect(element.returnType, isNull);
     expect(element.flags, 0);
   }
 }
-
-class _ElementsByNameFinder extends engine.RecursiveAstVisitor<Null> {
-  final String name;
-  final List<engine.Element> elements = [];
-
-  _ElementsByNameFinder(this.name);
-
-  @override
-  visitSimpleIdentifier(engine.SimpleIdentifier node) {
-    if (node.name == name && node.inDeclarationContext()) {
-      elements.add(node.staticElement);
-    }
-  }
-}