Introduces `ParserOptions`.

pkg/compiler/lib/src/parser/class_element_parser.dart

Index: pkg/compiler/lib/src/parser/class_element_parser.dart
diff --git a/pkg/compiler/lib/src/parser/class_element_parser.dart b/pkg/compiler/lib/src/parser/class_element_parser.dart
index 319cba59c96049d927c23a41b0eb629a93c6bb7d..d268e3a5cc7c5f086ff87ea2e8debc4a2fadf6fa 100644
--- a/pkg/compiler/lib/src/parser/class_element_parser.dart
+++ b/pkg/compiler/lib/src/parser/class_element_parser.dart
@@ -9,12 +9,14 @@ import '../tokens/token.dart' show
 
 import 'listener.dart' show
     Listener;
+import 'parser.dart' show
+    ParserOptions;
 import 'partial_parser.dart' show
     PartialParser;
 
 class ClassElementParser extends PartialParser {
-  ClassElementParser(Listener listener)
-      : super(listener, enableConditionalDirectives: false);
+  ClassElementParser(Listener listener, ParserOptions options)
+      : super(listener, options);
 
   Token parseClassBody(Token token) => fullParseClassBody(token);
 }