Keep all type arguments in summaries - dynamic or not.

pkg/analyzer/test/src/summary/summarize_ast_strong_test.dart

 // Copyright (c) 2016, 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 analyzer.test.src.summary.summarize_ast_strong_test;
 
 import 'package:unittest/unittest.dart';
 
 import '../../reflective_tests.dart';
 import 'summarize_ast_test.dart';
 
 main() {
   groupSep = ' | ';
   runReflectiveTests(LinkedSummarizeAstStrongTest);
 }
 
 /**
  * Override of [LinkedSummarizeAstTest] which uses strong mode.
  */
 @reflectiveTest
 class LinkedSummarizeAstStrongTest extends LinkedSummarizeAstTest {
   @override
+  bool get elementMode => false;
+
+  @override
   bool get strongMode => true;
 
   @override
   @failingTest
   test_bottom_reference_shared() {
     super.test_bottom_reference_shared();
   }
 
   @override
   @failingTest
@@ skipping 138 matching lines @@
   test_variable_propagated_type_new_reference() {
     super.test_variable_propagated_type_new_reference();
   }
 
   @override
   @failingTest
   test_variable_propagated_type_omit_dynamic() {
     super.test_variable_propagated_type_omit_dynamic();
   }
 }