Handle more constants in Constantifier

pkg/compiler/lib/src/compile_time_constants.dart

Index: pkg/compiler/lib/src/compile_time_constants.dart
diff --git a/pkg/compiler/lib/src/compile_time_constants.dart b/pkg/compiler/lib/src/compile_time_constants.dart
index eeba01fb9647fde2606ae2918121807a189adec5..285768fffa7bda7ae4b2692b0df021b6fd5b3dd1 100644
--- a/pkg/compiler/lib/src/compile_time_constants.dart
+++ b/pkg/compiler/lib/src/compile_time_constants.dart
@@ -1442,7 +1442,7 @@ class ErroneousAstConstant extends AstConstant {
             new NullConstantValue());
 }
 
-class _CompilerEnvironment implements Environment {
+class _CompilerEnvironment implements EvaluationEnvironment {
   final Compiler _compiler;
 
   _CompilerEnvironment(this._compiler);