Implement named arguments in InstanceMirror.invoke.

dart/sdk/lib/_internal/compiler/implementation/js/builder.dart

Index: dart/sdk/lib/_internal/compiler/implementation/js/builder.dart
diff --git a/dart/sdk/lib/_internal/compiler/implementation/js/builder.dart b/dart/sdk/lib/_internal/compiler/implementation/js/builder.dart
index b0424c6195d64da54a0631b643dc072aeabd23dc..36433e82a3f8933fcbd778e56ed5e57309971904 100644
--- a/dart/sdk/lib/_internal/compiler/implementation/js/builder.dart
+++ b/dart/sdk/lib/_internal/compiler/implementation/js/builder.dart
@@ -129,6 +129,14 @@ class JsBuilder {
         throw new ArgumentError('expression should be an empty Map');
       }
       return new ObjectInitializer([]);
+    } else if (expression is List) {
+      var values = new List<ArrayElement>(expression.length);
+      int index = 0;
+      for (var entry in expression) {
+        values[index] = new ArrayElement(index, toExpression(entry));
+        index++;
+      }
+      return new ArrayInitializer(values.length, values);
     } else {
       throw new ArgumentError('expression should be an Expression, '
                               'a String, a num, a bool, or a Map');