Prepare for decoupling analyzer ASTs from element model.

pkg/analysis_server/test/services/correction/fix_test.dart

Index: pkg/analysis_server/test/services/correction/fix_test.dart
diff --git a/pkg/analysis_server/test/services/correction/fix_test.dart b/pkg/analysis_server/test/services/correction/fix_test.dart
index 4ddbb782ce610483fce798180c5cca6b28f51bb0..2a2bfe65e85a7097b71d4b3db3fe0b34a525543c 100644
--- a/pkg/analysis_server/test/services/correction/fix_test.dart
+++ b/pkg/analysis_server/test/services/correction/fix_test.dart
@@ -12,6 +12,7 @@ import 'package:analysis_server/plugin/protocol/protocol.dart'
     hide AnalysisError;
 import 'package:analysis_server/src/services/correction/fix.dart';
 import 'package:analysis_server/src/services/correction/fix_internal.dart';
+import 'package:analyzer/dart/ast/resolution_accessors.dart';
 import 'package:analyzer/error/error.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/source/package_map_resolver.dart';
@@ -5303,8 +5304,8 @@ class LintFixTest extends BaseFixProcessorTest {
   void findLint(String src, String lintCode, {int length: 1}) {
     int errorOffset = src.indexOf('/*LINT*/');
     resolveTestUnit(src.replaceAll('/*LINT*/', ''));
-    error = new AnalysisError(testUnit.element.source, errorOffset, length,
-        new LintCode(lintCode, '<ignored>'));
+    error = new AnalysisError(elementForCompilationUnit(testUnit).source,
+        errorOffset, length, new LintCode(lintCode, '<ignored>'));
   }
 
   test_lint_addMissingOverride_field() async {