Fix for renaming (an invalid) ClassElement invocation.

pkg/analysis_server/test/services/index/dart_index_contributor_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.
 
 library test.services.src.index.dart_index_contributor;
 
 import 'package:analysis_server/plugin/index/index_core.dart';
 import 'package:analysis_server/src/services/index/index.dart';
 import 'package:analysis_server/src/services/index/index_contributor.dart';
 import 'package:analysis_server/src/services/index/index_store.dart';
@@ skipping 784 matching lines @@
     _assertRecordedRelation(indexable, IndexConstants.IS_REFERENCED_BY,
         _expectedLocation(vElement, 'A v;'));
     _assertRecordedRelation(indexable, IndexConstants.IS_REFERENCED_BY,
         _expectedLocation(mainElement, 'A(); // 2'));
     _assertRecordedRelation(indexable, IndexConstants.IS_REFERENCED_BY,
         _expectedLocation(mainElement, 'A.field = 1;'));
     _assertRecordedRelation(indexable, IndexConstants.IS_REFERENCED_BY,
         _expectedLocation(mainElement, 'A.field); // 3'));
   }
 
+  void test_isReferencedBy_ClassElement_invocation() {
+    verifyNoTestUnitErrors = false;
+    _indexTestUnit('''
+class A {}
+main() {
+  A(); // invalid code, but still a reference
+}''');
+    // prepare elements
+    Element mainElement = findElement('main');
+    Element classElement = findElement('A');
+    IndexableElement indexable = new IndexableElement(classElement);
+    // verify
+    _assertRecordedRelation(indexable, IndexConstants.IS_REFERENCED_BY,
+        _expectedLocation(mainElement, 'A();'));
+  }
+
   void test_isReferencedBy_ClassTypeAlias() {
     _indexTestUnit('''
 class A {}
 class B = Object with A;
 main(B p) {
   B v;
 }
 ''');
     // prepare elements
     ClassElement bElement = findElement("B");
@@ skipping 908 matching lines @@
   RecordedRelation(this.indexable, this.relationship, this.location);
 
   @override
   String toString() {
     return 'RecordedRelation(indexable=$indexable; relationship=$relationship; '
         'location=$location; flags='
         '${location.isQualified ? "Q" : ""}'
         '${location.isResolved ? "R" : ""})';
   }
 }