Fix for implicit constructor invocation navigation regions.

pkg/analysis_server/test/domain_analysis_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.domain.analysis;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/constants.dart';
@@ skipping 1335 matching lines @@
   int fff = 123;
   A(this.fff);
 }
 ''';
     return testNavigation(code, (NotificationNavigationHelper helper) {
       helper.assertHasRegion('fff);', 'fff = 123');
     });
   });
 
   group('instanceCreation', () {
+    test('implicit', () {
+      var code = '''
+class A {
+}
+main() {
+  new A();
+}
+''';
+      return testNavigation(code, (NotificationNavigationHelper helper) {
+        helper.asserHasRegionInts(
+            helper.findOffset('new A'), 'new A'.length,
+            helper.findOffset('A {'), 'A'.length);
+      });
+    });
+
     test('named', () {
       var code = '''
 class A {
   A.named() {}
 }
 main() {
   new A.named();
 }
 ''';
       return testNavigation(code, (NotificationNavigationHelper helper) {
@@ skipping 251 matching lines @@
       // subscribe
       helper.addAnalysisSubscriptionHighlights(helper.testFile);
       // wait, has regions
       return helper.waitForOperationsFinished().then((_) {
         var highlights = helper.getHighlights(helper.testFile);
         expect(highlights, isNot(isEmpty));
       });
     });
   });
 }