Make some ErrorCode-s compile-time errors and some just type warnings

compiler/javatests/com/google/dart/compiler/resolver/MapLiteralNegativeTest.dart

Index: compiler/javatests/com/google/dart/compiler/resolver/MapLiteralNegativeTest.dart
diff --git a/compiler/javatests/com/google/dart/compiler/resolver/MapLiteralNegativeTest.dart b/compiler/javatests/com/google/dart/compiler/resolver/MapLiteralNegativeTest.dart
deleted file mode 100644
index 318c988b269e495e1333a33a1013eabee8cfb2ac..0000000000000000000000000000000000000000
--- a/compiler/javatests/com/google/dart/compiler/resolver/MapLiteralNegativeTest.dart
+++ /dev/null
@@ -1,9 +0,0 @@
-// Copyright (c) 2011, 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.
-
-class A {
-  main() {
-    Map<String, int, int> map = {'foo':1};
-  }
-}