Handle more constants in Constantifier

pkg/compiler/lib/src/compile_time_constants.dart

 // Copyright (c) 2012, 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.compile_time_constant_evaluator;
 
 import 'common/resolution.dart' show Resolution;
 import 'common/tasks.dart' show CompilerTask, Measurer;
 import 'common.dart';
 import 'compiler.dart' show Compiler;
@@ skipping 1424 matching lines @@
 class ErroneousAstConstant extends AstConstant {
   ErroneousAstConstant(Element element, Node node)
       : super(
             element,
             node,
             // TODO(johnniwinther): Return a [NonConstantValue] instead.
             new ErroneousConstantExpression(),
             new NullConstantValue());
 }
 
-class _CompilerEnvironment implements Environment {
+class _CompilerEnvironment implements EvaluationEnvironment {
   final Compiler _compiler;
 
   _CompilerEnvironment(this._compiler);
 
   @override
   CommonElements get commonElements => _compiler.commonElements;
 
   @override
   String readFromEnvironment(String name) {
     return _compiler.fromEnvironment(name);
@@ skipping 13 matching lines @@
   @override
   ConstantExpression getFieldConstant(FieldElement field) {
     return field.constant;
   }
 
   @override
   ConstantExpression getLocalConstant(LocalVariableElement local) {
     return local.constant;
   }
 }