Serialize parameter nodes for local functions.

tests/compiler/dart2js/serialization/model_test_helper.dart

 // Copyright (c) 2015, 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 dart2js.serialization_model_test;
 
 import 'dart:async';
 import 'dart:io';
 import 'package:async_helper/async_helper.dart';
 import 'package:expect/expect.dart';
@@ skipping 180 matching lines @@
           "$member1.nestedClosures",
           areElementsEquivalent,
           verbose: verbose,
           onSameElement: (a, b) {
             LocalFunctionElement localFunction1 = a.expression;
             LocalFunctionElement localFunction2 = b.expression;
             checkElementIdentities(
                 localFunction1, localFunction2,
                 'enclosingClass',
                 localFunction1.enclosingClass, localFunction2.enclosingClass);
+            testResolvedAstEquivalence(
+                localFunction1.resolvedAst,
+                localFunction2.resolvedAst,
+                const CheckStrategy());
           });
     }
   }
   JavaScriptBackend backend1 = compiler1.backend;
   JavaScriptBackend backend2 = compiler2.backend;
   Expect.equals(
       backend1.inlineCache.getCurrentCacheDecisionForTesting(element1),
       backend2.inlineCache.getCurrentCacheDecisionForTesting(element2),
       "Inline cache decision mismatch for $element1 vs $element2");
 }
@@ skipping 103 matching lines @@
   return true;
 }
 
 String nodeToString(Node node) {
   String text = '$node';
   if (text.length > 40) {
     return '(${node.runtimeType}) ${text.substring(0, 37)}...';
   }
   return '(${node.runtimeType}) $text';
 }