Support serialization of WorldImpact

pkg/compiler/lib/src/js_backend/js_interop_analysis.dart

Index: pkg/compiler/lib/src/js_backend/js_interop_analysis.dart
diff --git a/pkg/compiler/lib/src/js_backend/js_interop_analysis.dart b/pkg/compiler/lib/src/js_backend/js_interop_analysis.dart
index 56aa58eca88456cf515aebd525c3d46ddde6cd36..1ba5398e90ba9a382c48c6910a2b31be58e3bdd7 100644
--- a/pkg/compiler/lib/src/js_backend/js_interop_analysis.dart
+++ b/pkg/compiler/lib/src/js_backend/js_interop_analysis.dart
@@ -70,11 +70,11 @@ class JsInteropAnalysis {
         ConstantValue value = constructedConstant.fields[nameField];
         if (value.isString) {
           StringConstantValue stringValue = value;
-          backend.setJsInteropName(
+          backend.nativeData.setJsInteropName(
               e, stringValue.primitiveValue.slowToString());
         } else {
           // TODO(jacobr): report a warning if the value is not a String.
-          backend.setJsInteropName(e, '');
+          backend.nativeData.setJsInteropName(e, '');
         }
         enabledJsInterop = true;
         return;