Fix various parser bugs related to modifiers of top-level and class members.

dart/tests/compiler/dart2js/message_kind_helper.dart

Index: dart/tests/compiler/dart2js/message_kind_helper.dart
diff --git a/dart/tests/compiler/dart2js/message_kind_helper.dart b/dart/tests/compiler/dart2js/message_kind_helper.dart
index 6302bf190608302f6e25b8b008093c02377840c4..b7163fe8369661572f6b0ebb4ab7ffd982207404 100644
--- a/dart/tests/compiler/dart2js/message_kind_helper.dart
+++ b/dart/tests/compiler/dart2js/message_kind_helper.dart
@@ -14,13 +14,8 @@ import 'memory_compiler.dart';
 
 const String ESCAPE_REGEXP = r'[[\]{}()*+?.\\^$|]';
 
-Compiler check(MessageKind kind, Compiler cachedCompiler,
-               {bool expectNoHowToFix: false}) {
-  if (expectNoHowToFix) {
-    Expect.isNull(kind.howToFix);
-  } else {
-    Expect.isNotNull(kind.howToFix);
-  }
+Compiler check(MessageKind kind, Compiler cachedCompiler) {
+  Expect.isNotNull(kind.howToFix);
   Expect.isFalse(kind.examples.isEmpty);
 
   for (String example in kind.examples) {
@@ -42,7 +37,7 @@ Compiler check(MessageKind kind, Compiler cachedCompiler,
 
     Expect.isFalse(messages.isEmpty, 'No messages in """$example"""');
 
-    String expectedText = kind.howToFix == null
+    String expectedText = !kind.hasHowToFix
         ? kind.template : '${kind.template}\n${kind.howToFix}';
     String pattern = expectedText.replaceAllMapped(
         new RegExp(ESCAPE_REGEXP), (m) => '\\${m[0]}');
@@ -52,6 +47,8 @@ Compiler check(MessageKind kind, Compiler cachedCompiler,
       Expect.isTrue(new RegExp('^$pattern\$').hasMatch(message),
                     '"$pattern" does not match "$message"');
     }
-    return compiler;
+    cachedCompiler = compiler;
   }
+
+  return cachedCompiler;
 }