Revert r15577 dart2js: Dot-separated field-and-super descriptor string...

sdk/lib/_internal/compiler/implementation/js_backend/native_emitter.dart

Index: sdk/lib/_internal/compiler/implementation/js_backend/native_emitter.dart
diff --git a/sdk/lib/_internal/compiler/implementation/js_backend/native_emitter.dart b/sdk/lib/_internal/compiler/implementation/js_backend/native_emitter.dart
index e89b98da271b7efe2b602646620ab79ca06aaa68..caaf5b744b3d0d629ccdb8849701b165d2ce01ec 100644
--- a/sdk/lib/_internal/compiler/implementation/js_backend/native_emitter.dart
+++ b/sdk/lib/_internal/compiler/implementation/js_backend/native_emitter.dart
@@ -90,15 +90,14 @@ class NativeEmitter {
   String get defineNativeClassFunction {
     return """
 function(cls, desc) {
+  var fields = desc[''] || [];
   var generateGetterSetter = ${emitter.generateGetterSetterFunction};
-  var fields = desc[''];
-  var fields_array = fields ? fields.split('.') : [];
-  for (var i = 0; i < fields_array.length; i++) {
-    generateGetterSetter(fields_array[i], desc);
+  for (var i = 0; i < fields.length; i++) {
+    generateGetterSetter(fields[i], desc);
   }
   var hasOwnProperty = Object.prototype.hasOwnProperty;
   for (var method in desc) {
-    if (method) {  """/* method != '' */"""
+    if (method !== '') {
       if (hasOwnProperty.call(desc, method)) {
         $dynamicName(method)[cls] = desc[method];
       }
@@ -161,8 +160,7 @@ function(cls, desc) {
     CodeBuffer getterSetterBuffer = new CodeBuffer();
     CodeBuffer methodBuffer = new CodeBuffer();
 
-    emitter.emitClassFields(
-        classElement, fieldBuffer, isNative: true, emitEndingComma: false);
+    emitter.emitClassFields(classElement, fieldBuffer, false);
     emitter.emitClassGettersSetters(classElement, getterSetterBuffer, false);
     emitter.emitInstanceMembers(classElement, methodBuffer, false);