Use Entity instead of Element in ConstantValue

pkg/compiler/lib/src/inferrer/type_graph_inferrer.dart

Index: pkg/compiler/lib/src/inferrer/type_graph_inferrer.dart
diff --git a/pkg/compiler/lib/src/inferrer/type_graph_inferrer.dart b/pkg/compiler/lib/src/inferrer/type_graph_inferrer.dart
index 3b7884e8e44a0906f937ba1d3171ecfe0117bb4b..eee07aa45da2114cbb35395cd3c1a2742e96c1fd 100644
--- a/pkg/compiler/lib/src/inferrer/type_graph_inferrer.dart
+++ b/pkg/compiler/lib/src/inferrer/type_graph_inferrer.dart
@@ -858,7 +858,8 @@ class TypeGraphInferrerEngine
               if (value != null) {
                 if (value.isFunction) {
                   FunctionConstantValue functionConstant = value;
-                  type = types.allocateClosure(node, functionConstant.element);
+                  MethodElement function = functionConstant.element;
+                  type = types.allocateClosure(node, function);
                 } else {
                   // Although we might find a better type, we have to keep
                   // the old type around to ensure that we get a complete view