Store and serialize NativeBehavior in TreeElements.

pkg/compiler/lib/src/serialization/modelz.dart

Index: pkg/compiler/lib/src/serialization/modelz.dart
diff --git a/pkg/compiler/lib/src/serialization/modelz.dart b/pkg/compiler/lib/src/serialization/modelz.dart
index ce0fc988ecd307980f6efd0d32bda5e408ca48ce..db0784676302cd4f564e2aff124ac2b7dc1250ad 100644
--- a/pkg/compiler/lib/src/serialization/modelz.dart
+++ b/pkg/compiler/lib/src/serialization/modelz.dart
@@ -251,8 +251,10 @@ abstract class AnalyzableElementMixin implements AnalyzableElement, ElementZ {
 }
 
 abstract class AstElementMixin implements AstElement, ElementZ {
+  // TODO(johnniwinther): This is need for the token invariant assertion. Find

[Siggi Cherem (dart-lang), 2016/04/18 16:48:54]

need => needed

[Johnni Winther, 2016/04/20 10:12:55]

Done.

+  // another way to bypass the test for modelz.
   @override
-  bool get hasNode => _unsupported('hasNode');
+  bool get hasNode => false;
 
   @override
   bool get hasResolvedAst => _unsupported('hasResolvedAst');