Fix bugs found in checked mode.

tests/compiler/dart2js/parser_helper.dart

Index: tests/compiler/dart2js/parser_helper.dart
diff --git a/tests/compiler/dart2js/parser_helper.dart b/tests/compiler/dart2js/parser_helper.dart
index d17c03bd7fc1925bbbdde086b14a93af00805ea0..37afdbe20ff6ee6d297cbd468f0cfde82c4e34f7 100644
--- a/tests/compiler/dart2js/parser_helper.dart
+++ b/tests/compiler/dart2js/parser_helper.dart
@@ -34,7 +34,7 @@ Node parseBodyCode(String text, Function parseMethod) {
           new MockFile(text));
   LibraryElement library = new LibraryElement(script);
   library.canUseNative = true;
-  NodeListener listener = new NodeListener(lc, library);
+  NodeListener listener = new NodeListener(lc, library.entryCompilationUnit);
   Parser parser = new Parser(listener);
   Token endToken = parseMethod(parser, tokens);
   assert(endToken.kind == EOF_TOKEN);