dart2dart properly collect top level fields

lib/compiler/implementation/dart_backend/placeholder_collector.dart

Index: lib/compiler/implementation/dart_backend/placeholder_collector.dart
diff --git a/lib/compiler/implementation/dart_backend/placeholder_collector.dart b/lib/compiler/implementation/dart_backend/placeholder_collector.dart
index 76bc31d41b60119eea82f51abc3bd068d5f78e0e..8ce0648b81d9e257b9f0ab4ba7c168ee7f9d2dcd 100644
--- a/lib/compiler/implementation/dart_backend/placeholder_collector.dart
+++ b/lib/compiler/implementation/dart_backend/placeholder_collector.dart
@@ -175,6 +175,15 @@ class PlaceholderCollector extends AbstractVisitor {
           internalError('Unreachable case');
         }
       }
+    } else if (element.isTopLevel()) {
+      Node fieldNode = element.parseNode(compiler);
+      if (fieldNode is Identifier) {
+        makeElementPlaceholder(fieldNode, element);
+      } else if (fieldNode is SendSet) {
+        makeElementPlaceholder(fieldNode.selector, element);
+      } else {
+        assert(false); // Unreachable.

[Anton Muhin, 2012/08/16 11:05:48]

nit: internalError, please

[Roman, 2012/08/16 11:46:09]

Done.

+      }
     }
   }