[Isolates] Merge 7201:7258 from bleeding_edge to isolates.

src/handles.cc

 // Copyright 2009 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 383 matching lines @@
 }
 
 
 Handle<Object> SetPrototype(Handle<JSObject> obj, Handle<Object> value) {
   const bool skip_hidden_prototypes = false;
   CALL_HEAP_FUNCTION(obj->GetIsolate(),
                      obj->SetPrototype(*value, skip_hidden_prototypes), Object);
 }
 
 
+Handle<Object> PreventExtensions(Handle<JSObject> object) {
+  CALL_HEAP_FUNCTION(object->GetIsolate(), object->PreventExtensions(), Object);
+}
+
+
 Handle<Object> GetHiddenProperties(Handle<JSObject> obj,
                                    bool create_if_needed) {
   Isolate* isolate = obj->GetIsolate();
   Object* holder = obj->BypassGlobalProxy();
   if (holder->IsUndefined()) return isolate->factory()->undefined_value();
   obj = Handle<JSObject>(JSObject::cast(holder));
 
   if (obj->HasFastProperties()) {
     // If the object has fast properties, check whether the first slot
     // in the descriptor array matches the hidden symbol. Since the
@@ skipping 563 matching lines @@
 
 OptimizedObjectForAddingMultipleProperties::
 ~OptimizedObjectForAddingMultipleProperties() {
   // Reoptimize the object to allow fast property access.
   if (has_been_transformed_) {
     TransformToFastProperties(object_, unused_property_fields_);
   }
 }
 
 } }  // namespace v8::internal