[runtime] Deprecate Runtime_FinalizeClassDefinition entry.

src/runtime/runtime-classes.cc

 // Copyright 2014 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.
 
 #include "src/runtime/runtime-utils.h"
 
 #include <stdlib.h>
 #include <limits>
 
 #include "src/arguments.h"
@@ skipping 176 matching lines @@
   CONVERT_SMI_ARG_CHECKED(end_position, 3);
 
   Handle<Object> result;
   ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
       isolate, result, DefineClass(isolate, super_class, constructor,
                                    start_position, end_position));
   return *result;
 }
 
 
-RUNTIME_FUNCTION(Runtime_FinalizeClassDefinition) {
-  HandleScope scope(isolate);
-  DCHECK(args.length() == 2);
-  CONVERT_ARG_HANDLE_CHECKED(JSObject, constructor, 0);
-  JSObject::MigrateSlowToFast(constructor, 0, "RuntimeToFastProperties");
-  return *constructor;
-}
-
 static MaybeHandle<Object> LoadFromSuper(Isolate* isolate,
                                          Handle<Object> receiver,
                                          Handle<JSObject> home_object,
                                          Handle<Name> name) {
   if (home_object->IsAccessCheckNeeded() &&
       !isolate->MayAccess(handle(isolate->context()), home_object)) {
     isolate->ReportFailedAccessCheck(home_object);
     RETURN_EXCEPTION_IF_SCHEDULED_EXCEPTION(isolate, Object);
   }
 
@@ skipping 197 matching lines @@
 
 RUNTIME_FUNCTION(Runtime_GetSuperConstructor) {
   SealHandleScope shs(isolate);
   DCHECK_EQ(1, args.length());
   CONVERT_ARG_CHECKED(JSFunction, active_function, 0);
   return active_function->map()->prototype();
 }
 
 }  // namespace internal
 }  // namespace v8