Switch ddc to use @JS instead of @JSName

lib/src/codegen/js_interop.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library dev_compiler.src.js_interop;
 
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/constant.dart';
 
 bool _isJsLibType(String expectedName, Element e) =>
     e?.name == expectedName && _isJsLib(e.library);
 
 bool _isJsLib(LibraryElement e) {
   var libName = e?.name;
   return libName == 'js' ||
       libName == 'js.varargs' ||
       libName == 'dart._js_helper';
 }
 
 bool isJsRestAnnotation(DartObjectImpl value) =>
     _isJsLibType('_Rest', value.type.element);
 
 bool isJsSpreadInvocation(MethodInvocation i) =>
     _isJsLibType('spread', i.methodName?.bestElement);
 
-// TODO(jmesserly): Move JsName, JsPeerInterface to package:js (see issue #135).
-bool isJsNameAnnotation(DartObjectImpl value) => value.type.name == 'JsName';
+// TODO(jmesserly): Move JsPeerInterface to package:js (see issue #135).
+bool isJSAnnotation(DartObjectImpl value) => value.type.name == 'JS';
 
 bool isJsPeerInterface(DartObjectImpl value) =>
     value.type.name == 'JsPeerInterface';