Strict mode poision pills.

src/handles.cc

Index: src/handles.cc
diff --git a/src/handles.cc b/src/handles.cc
index 2923f98809e993f9c6ab358d4c712df40fef11d7..65cbd1a6965a117a9c844d35c229f3392bc49fa2 100644
--- a/src/handles.cc
+++ b/src/handles.cc
@@ -362,6 +362,11 @@ Handle<Object> SetPrototype(Handle<JSObject> obj, Handle<Object> value) {
 }
 
 
+Handle<Object> PreventExtensions(Handle<JSObject> object) {
+  CALL_HEAP_FUNCTION(object->PreventExtensions(), Object);
+}
+
+
 Handle<Object> GetHiddenProperties(Handle<JSObject> obj,
                                    bool create_if_needed) {
   Object* holder = obj->BypassGlobalProxy();