Always invoke C++ ArrayPush builtin.

src/top.cc

Index: src/top.cc
diff --git a/src/top.cc b/src/top.cc
index b9db4be52e73355e7497f35d50c3c2b4bebde129..f72dc706d35f5024369bf5e1b9a9999d08f28bd0 100644
--- a/src/top.cc
+++ b/src/top.cc
@@ -949,27 +949,6 @@ Handle<Context> Top::GetCallingGlobalContext() {
 }
 
 
-bool Top::CanHaveSpecialFunctions(JSObject* object) {
-  return object->IsJSArray();
-}
-
-
-Object* Top::LookupSpecialFunction(JSObject* receiver,
-                                   JSObject* prototype,
-                                   JSFunction* function) {
-  if (CanHaveSpecialFunctions(receiver)) {
-    FixedArray* table = context()->global_context()->special_function_table();
-    for (int index = 0; index < table->length(); index +=3) {
-      if ((prototype == table->get(index)) &&
-          (function == table->get(index+1))) {
-        return table->get(index+2);
-      }
-    }
-  }
-  return Heap::undefined_value();
-}
-
-
 char* Top::ArchiveThread(char* to) {
   memcpy(to, reinterpret_cast<char*>(&thread_local_), sizeof(thread_local_));
   InitializeThreadLocal();