Revert of [regexp] Port test, match, and search

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index a5ef39056e85753a4608a1f36dc5ccfcb898e016..8e7ba5e82106730331fc147e967e332ebca8d93f 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -16506,7 +16506,7 @@
   } else {
     // Map has changed, so use generic, but slower, method.
     RETURN_ON_EXCEPTION(isolate, JSReceiver::SetProperty(
-                                     regexp, factory->lastIndex_string(),
+                                     regexp, factory->last_index_string(),
                                      Handle<Smi>(Smi::kZero, isolate), STRICT),
                         JSRegExp);
   }