Fix factories in Frog to correspond to the new syntax.

frog/await/transformation.dart

Index: frog/await/transformation.dart
diff --git a/frog/await/transformation.dart b/frog/await/transformation.dart
index a5c83bf29e4b3bb0fb93fe9bd77531399fbf213e..7d3691322bfad7360881eebe2d990897d332f496 100644
--- a/frog/await/transformation.dart
+++ b/frog/await/transformation.dart
@@ -673,7 +673,7 @@ class AwaitProcessor implements TreeVisitor {
         [new FormalNode(
           false, false, null /* infer type from body? */,
           param, null, param.span)
-        ], null, null, null,
+        ], null, null,
         new BlockStatement(afterAwait, node.span), node.span),
         node.span);
     continuation.clear();
@@ -739,7 +739,7 @@ class AwaitProcessor implements TreeVisitor {
     List<Statement> continuationBlock = [];
     continuationBlock.addAll(continuation);
     return new FunctionDefinition([], null,
-        new Identifier(name, span), [], null, null, null,
+        new Identifier(name, span), [], null, null,
         new BlockStatement(continuationBlock, span), span);
   }