Fix const unparse. Example:

tests/compiler/dart2js/unparser_test.dart

Index: tests/compiler/dart2js/unparser_test.dart
diff --git a/tests/compiler/dart2js/unparser_test.dart b/tests/compiler/dart2js/unparser_test.dart
index a810b34caa79d267c299f7eb65ded1f4d077f234..faaa5b10ab4c14a787698a6a8f5660ca202bf2f8 100644
--- a/tests/compiler/dart2js/unparser_test.dart
+++ b/tests/compiler/dart2js/unparser_test.dart
@@ -94,6 +94,10 @@ testPrefixIncrements() {
   testUnparse('++a[++b[i]];');
 }
 
+testConstParameterModifier() {

[Anton Muhin, 2012/07/06 10:22:46]

please, add tests for:

foo([var a = const {}]) {}

and for

foo() {
  var a = const [];
  var b = const {};
}

bonus point for something like:

foo([var a = const [ const { 'a': const [ 1, 2, 3 ] } ]]) {}

And what about const Foo() constructs overall?

[Roman, 2012/07/06 11:46:05]

Done. And I reverted the case for NewExpression.

+  testUnparse('foo([var a=const []]){}');
+}
+
 testSimpleFileUnparse() {
   final src = '''
 should_be_dropped() {
@@ -119,5 +123,6 @@ main() {
   testIndexedOperatorDecl();
   testNativeMethods();
   testPrefixIncrements();
+  testConstParameterModifier();
   testSimpleFileUnparse();
 }