[Object.observe] rename intrinsic change record types for consitency.

src/object-observe.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 110 matching lines @@
 
   for (var type in typeMap1) {
     if (TypeMapHasType(typeMap1, type) && TypeMapHasType(typeMap2, type))
       return false;
   }
 
   return true;
 }
 
 var defaultAcceptTypes = TypeMapCreateFromList([
-  'new',
-  'updated',
-  'deleted',
-  'prototype',
-  'reconfigured',
+  'add',
+  'update',
+  'delete',
+  'setPrototype',
+  'reconfigure',
   'preventExtensions'
 ]);
 
 // An Observer is a registration to observe an object by a callback with
 // a given set of accept types. If the set of accept types is the default
 // set for Object.observe, the observer is represented as a direct reference
 // to the callback. An observer never changes its accept types and thus never
 // needs to "normalize".
 function ObserverCreate(callback, acceptList) {
   return IS_UNDEFINED(acceptList) ? callback : {
@@ skipping 200 matching lines @@
 
   var objectInfo = objectInfoMap.get(object);
   if (IS_UNDEFINED(objectInfo))
     return object;
 
   ObjectInfoRemoveObserver(objectInfo, callback);
   return object;
 }
 
 function ArrayObserve(object, callback) {
-  return ObjectObserve(object, callback, ['new',
-                                          'updated',
-                                          'deleted',
+  return ObjectObserve(object, callback, ['add',
+                                          'update',
+                                          'delete',
                                           'splice']);
 }
 
 function ArrayUnobserve(object, callback) {
   return ObjectUnobserve(object, callback);
 }
 
 function ObserverEnqueueIfActive(observer, objectInfo, changeRecord,
                                  needsAccessCheck) {
   if (!ObserverIsActive(observer, objectInfo) ||
@@ skipping 215 matching lines @@
     "observe", ArrayObserve,
     "unobserve", ArrayUnobserve
   ));
   InstallFunctions(notifierPrototype, DONT_ENUM, $Array(
     "notify", ObjectNotifierNotify,
     "performChange", ObjectNotifierPerformChange
   ));
 }
 
 SetupObjectObserve();