Add more equivalence tests for ElementEnvironment

pkg/compiler/lib/src/kernel/element_map.dart

 // Copyright (c) 2017, 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.
 
 import 'package:kernel/ast.dart' as ir;
 
 import '../common.dart';
 import '../common/names.dart';
 import '../constants/constructors.dart';
 import '../constants/expressions.dart';
@@ skipping 773 matching lines @@
 
     Map<FieldEntity, ConstantExpression> fieldMap =
         <FieldEntity, ConstantExpression>{};
 
     void registerField(ir.Field field, ConstantExpression constant) {
       fieldMap[elementAdapter.getField(field)] = constant;
     }
 
     if (!isRedirecting) {
       for (ir.Field field in cls.fields) {
+        if (field.isStatic) continue;
         if (field.initializer != null) {
           registerField(field, field.initializer.accept(this));
         }
       }
     }
 
     ConstructedConstantExpression superConstructorInvocation;
     for (ir.Initializer initializer in node.initializers) {
       if (initializer is ir.FieldInitializer) {
         registerField(initializer.field, initializer.value.accept(this));
@@ skipping 10 matching lines @@
     }
     if (isRedirecting) {
       return new RedirectingGenerativeConstantConstructor(
           defaultValues, superConstructorInvocation);
     } else {
       return new GenerativeConstantConstructor(
           type, defaultValues, fieldMap, superConstructorInvocation);
     }
   }
 }