Refactor strong mode to use standard Analyzer errors

pkg/analyzer/test/src/task/dart_test.dart

Index: pkg/analyzer/test/src/task/dart_test.dart
diff --git a/pkg/analyzer/test/src/task/dart_test.dart b/pkg/analyzer/test/src/task/dart_test.dart
index 9892d3fbc2ad5647fc68cffb10ace4f1863926b3..48e0b771f09735eda38fd5101cf8d085d8ffa6c5 100644
--- a/pkg/analyzer/test/src/task/dart_test.dart
+++ b/pkg/analyzer/test/src/task/dart_test.dart
@@ -21,7 +21,7 @@ import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/services/lint.dart';
 import 'package:analyzer/src/task/dart.dart';
 import 'package:analyzer/src/task/html.dart';
-import 'package:analyzer/src/task/strong/info.dart';
+import 'package:analyzer/src/task/strong/ast_properties.dart' as strong_ast;
 import 'package:analyzer/task/dart.dart';
 import 'package:analyzer/task/general.dart';
 import 'package:analyzer/task/model.dart';
@@ -5090,9 +5090,7 @@ void main() {
         AstFinder.getStatementsInTopLevelFunction(unit, "main");
     ExpressionStatement statement = statements[1];
     IndexExpression idx = statement.expression;
-    expect(DynamicInvoke.get(idx.target), isNotNull);
-    expect(DynamicInvoke.get(idx.target), isNotNull);
-    expect(DynamicInvoke.get(idx.target), isTrue);
+    expect(strong_ast.isDynamicInvoke(idx.target), isTrue);
   }
 
   void test_perform_verifyError() {