Preserve type variables in closure conversion.

pkg/kernel/lib/binary/ast_from_binary.dart

Index: pkg/kernel/lib/binary/ast_from_binary.dart
diff --git a/pkg/kernel/lib/binary/ast_from_binary.dart b/pkg/kernel/lib/binary/ast_from_binary.dart
index 1e7f8762dad21bfac4914cee9da505ba20a35bdc..7a065107848d06bb617e7db61317c7cfd76c051d 100644
--- a/pkg/kernel/lib/binary/ast_from_binary.dart
+++ b/pkg/kernel/lib/binary/ast_from_binary.dart
@@ -932,8 +932,9 @@ class BinaryBuilder {
         var topLevelFunctionReference = readMemberReference();
         var contextVector = readExpression();
         var functionType = readDartType();
+        var typeArgs = readDartTypeList();
         return new ClosureCreation.byReference(
-            topLevelFunctionReference, contextVector, functionType);
+            topLevelFunctionReference, contextVector, functionType, typeArgs);
       default:
         throw fail('Invalid expression tag: $tag');
     }