[runtime] Replace many buggy uses of %_CallFunction with %_Call.

src/object-observe.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 var $observeEnqueueSpliceRecord;
 var $observeBeginPerformSplice;
 var $observeEndPerformSplice;
 
 var $observeObjectMethods;
 var $observeArrayMethods;
@@ skipping 583 matching lines @@
   var performChangeFn = %GetObjectContextNotifierPerformChange(objectInfo);
   performChangeFn(objectInfo, changeType, changeFn);
 }
 
 
 function NativeObjectNotifierPerformChange(objectInfo, changeType, changeFn) {
   ObjectInfoAddPerformingType(objectInfo, changeType);
 
   var changeRecord;
   try {
-    changeRecord = %_CallFunction(UNDEFINED, changeFn);
+    changeRecord = changeFn();
   } finally {
     ObjectInfoRemovePerformingType(objectInfo, changeType);
   }
 
   if (IS_SPEC_OBJECT(changeRecord))
     ObjectInfoEnqueueExternalChangeRecord(objectInfo, changeRecord, changeType);
 }
 
 
 function ObjectGetNotifier(object) {
@@ skipping 92 matching lines @@
   "native_object_get_notifier", NativeObjectGetNotifier,
   "native_object_notifier_perform_change", NativeObjectNotifierPerformChange,
   "native_object_observe", NativeObjectObserve,
   "observers_begin_perform_splice", BeginPerformSplice,
   "observers_end_perform_splice", EndPerformSplice,
   "observers_enqueue_splice", EnqueueSpliceRecord,
   "observers_notify_change", NotifyChange,
 ]);
 
 })