Make more use of generated classes in analysis server.

pkg/analysis_server/test/search/element_references_test.dart

Index: pkg/analysis_server/test/search/element_references_test.dart
diff --git a/pkg/analysis_server/test/search/element_references_test.dart b/pkg/analysis_server/test/search/element_references_test.dart
index 1139d1029ea5231c7d81478b096a7a4a32d53625..4997f2d018599a29da9a6a83b0da8a35cb0c1012 100644
--- a/pkg/analysis_server/test/search/element_references_test.dart
+++ b/pkg/analysis_server/test/search/element_references_test.dart
@@ -6,11 +6,10 @@ library test.search.element_references;
 
 import 'dart:async';
 
-import 'package:analysis_server/src/computer/element.dart';
-import 'package:analysis_server/src/constants.dart';
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/protocol2.dart' show
-    SearchFindElementReferencesParams;
+    SearchFindElementReferencesParams, ElementKind,
+    SearchFindElementReferencesResult, Element;
 import 'package:analysis_server/src/search/search_result.dart';
 import 'package:analysis_testing/reflective_tests.dart';
 import 'package:unittest/unittest.dart';
@@ -34,8 +33,9 @@ class ElementReferencesTest extends AbstractSearchDomainTest {
       Request request = new SearchFindElementReferencesParams(testFile, offset,
           includePotential).toRequest('0');
       Response response = handleSuccessfulRequest(request);
-      searchId = response.getResult(ID);
-      searchElement = response.getResult(ELEMENT);
+      var result = new SearchFindElementReferencesResult.fromResponse(response);
+      searchId = result.id;
+      searchElement = result.element;
       results.clear();
       return waitForSearchResults();
     });