Handle named mixin application in emitter

pkg/compiler/lib/src/js_emitter/program_builder/field_visitor.dart

Index: pkg/compiler/lib/src/js_emitter/program_builder/field_visitor.dart
diff --git a/pkg/compiler/lib/src/js_emitter/program_builder/field_visitor.dart b/pkg/compiler/lib/src/js_emitter/program_builder/field_visitor.dart
index b1e12121f5343d75ee46a96fb596a620e15f0d31..2a32c5a71273f51a05178b6aaf1e949fddc26e14 100644
--- a/pkg/compiler/lib/src/js_emitter/program_builder/field_visitor.dart
+++ b/pkg/compiler/lib/src/js_emitter/program_builder/field_visitor.dart
@@ -86,8 +86,8 @@ class FieldVisitor {
     void visitField(FieldEntity field, {ClassEntity holder}) {
       assert(!(field is FieldElement && !field.isDeclaration), failedAt(field));
 
-      bool isMixinNativeField = isNativeClass &&
-          _elementEnvironment.isUnnamedMixinApplication(holder);
+      bool isMixinNativeField =
+          isNativeClass && _elementEnvironment.isMixinApplication(holder);
 
       // See if we can dynamically create getters and setters.
       // We can only generate getters and setters for [element] since