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 fc965728d5d938c198a3a5faef0fa335a5120a4f..bbbd7f1c99b8dcecaf97a2f7a990774272aab3d9 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;