Ignore 'dynamic' in the navigation computer.

pkg/analysis_server/test/analysis_notification_navigation_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.notification.navigation;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/computer/element.dart';
@@ skipping 245 matching lines @@
   print(aaa);
 }
 ''');
     return prepareNavigation().then((_) {
       assertHasRegionTarget('AAA aaa', 'AAA {}');
       assertHasRegionTarget('aaa);', 'aaa = null');
       assertHasRegionTarget('main() {', 'main() {');
     });
   }
 
+  test_dynamic() {
+    addTestFile('''
+main() {
+  dynamic v = null;
+}
+''');
+    return prepareNavigation().then((_) {
+      assertNoRegionAt('dynamic');
+    });
+  }
+
   test_identifier_unresolved() {
     addTestFile('''
 main() {
   print(vvv);
 }
 ''');
     return prepareNavigation().then((_) {
       assertNoRegionString('vvv');
     });
   }
@@ skipping 203 matching lines @@
   final int length;
   final List<Element> targets;
 
   NavigationRegion(this.offset, this.length, this.targets);
 
   @override
   String toString() {
     return 'NavigationRegion(offset=$offset; length=$length; targets=$targets';
   }
 }