Split NativeData

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

Index: pkg/compiler/lib/src/js_backend/namer.dart
diff --git a/pkg/compiler/lib/src/js_backend/namer.dart b/pkg/compiler/lib/src/js_backend/namer.dart
index 0435821446233e48aee2a84917c6fc719e545ca5..5fff9cf2e4d099167ba5dc0867012606877e9806 100644
--- a/pkg/compiler/lib/src/js_backend/namer.dart
+++ b/pkg/compiler/lib/src/js_backend/namer.dart
@@ -796,7 +796,7 @@ class Namer {
   }
 
   String _fixedBackendPath(Element element) {
-    if (!backend.isJsInterop(element)) return null;
+    if (!backend.nativeData.isJsInterop(element)) return null;
     if (element.isInstanceMember) return 'this';
     if (element.isConstructor) return _fixedBackendPath(element.enclosingClass);
     if (element.isLibrary) return 'self';
@@ -979,7 +979,7 @@ class Namer {
 
   /// True if [class_] is a non-native class that inherits from a native class.
   bool _isUserClassExtendingNative(ClassElement class_) {
-    return !backend.isNative(class_) &&
+    return !backend.nativeData.isNativeClass(class_) &&
         backend.nativeData.isNativeOrExtendsNative(class_.superclass);
   }