Add NativeClassData/NativeClassDataBuilder

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 2ce0623d4d3d7bbd09f546bff43c5d517600c763..6e40c7d4be72c4345674e21493677edeb5fd9622 100644
--- a/pkg/compiler/lib/src/js_backend/js_interop_analysis.dart
+++ b/pkg/compiler/lib/src/js_backend/js_interop_analysis.dart
@@ -68,11 +68,11 @@ class JsInteropAnalysis {
         ConstantValue value = constructedConstant.fields[nameField];
         if (value.isString) {
           StringConstantValue stringValue = value;
-          backend.nativeDataBuilder
+          backend.nativeClassDataBuilder
               .setJsInteropName(e, stringValue.primitiveValue.slowToString());
         } else {
           // TODO(jacobr): report a warning if the value is not a String.
-          backend.nativeDataBuilder.setJsInteropName(e, '');
+          backend.nativeClassDataBuilder.setJsInteropName(e, '');
         }
         enabledJsInterop = true;
         return;