Fix unparsing of variable definitions.

lib/compiler/implementation/tree/unparser.dart

Index: lib/compiler/implementation/tree/unparser.dart
diff --git a/lib/compiler/implementation/tree/unparser.dart b/lib/compiler/implementation/tree/unparser.dart
index fc1d85fdd750e6d6fd46f5d776a0c661d6b44b50..663872f3e2164fa90b58bbf7b38374d47806546d 100644
--- a/lib/compiler/implementation/tree/unparser.dart
+++ b/lib/compiler/implementation/tree/unparser.dart
@@ -276,13 +276,14 @@ class Unparser implements Visitor {
   }
 
   visitVariableDefinitions(VariableDefinitions node) {
+    visit(node.modifiers);
+    if (node.modifiers.nodes.length() > 0) {
+      sb.add(' ');
+    }
     if (node.type !== null) {
       visit(node.type);
-    } else {
-      sb.add('var');
+      sb.add(' ');
     }
-    sb.add(' ');
-    // TODO(karlklose): print modifiers.
     visit(node.definitions);
     if (node.endToken.value == const SourceString(';')) {
       add(node.endToken.value);