Handle deferred access of unserialized code.

pkg/compiler/lib/src/serialization/equivalence.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.
 
 /// Functions for asserting equivalence across serialization.
 
 library dart2js.serialization.equivalence;
 
 import '../closure.dart';
 import '../common.dart';
@@ skipping 365 matching lines @@
       CompilationUnitElement element1, CompilationUnitElement element2) {
     return strategy.test(
             element1, element2, 'name', element1.name, element2.name) &&
         strategy.test(element1, element2, 'script.resourceUri',
             element1.script.resourceUri, element2.script.resourceUri) &&
         visit(element1.library, element2.library);
   }
 
   @override
   bool visitClassElement(ClassElement element1, ClassElement element2) {
-    if (!strategy.test(element1, element2, 'isUnnamedMixinApplication',
+    if (!strategy.test(
+        element1,
+        element2,
+        'isUnnamedMixinApplication',
         element1.isUnnamedMixinApplication,
         element2.isUnnamedMixinApplication)) {
       return false;
     }
     if (element1.isUnnamedMixinApplication) {
       MixinApplicationElement mixin1 = element1;
       MixinApplicationElement mixin2 = element2;
       return strategy.testElements(
               mixin1, mixin2, 'subclass', mixin1.subclass, mixin2.subclass) &&
           // Using the [mixinType] is more precise but requires the test to
@@ skipping 1422 matching lines @@
   @override
   bool visitStatement(Statement node1, Statement node2) {
     throw new UnsupportedError('Unexpected nodes: $node1 <> $node2');
   }
 
   @override
   bool visitStringNode(StringNode node1, StringNode node2) {
     throw new UnsupportedError('Unexpected nodes: $node1 <> $node2');
   }
 }