Revert r43217, r43215, r43208, r43207, and r43202.

runtime/bin/builtin_common.cc

-// Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-#include <stdio.h>
-
-#include "include/dart_api.h"
-
-#include "bin/builtin.h"
-#include "bin/dartutils.h"
-#include "bin/platform.h"
-
-namespace dart {
-namespace bin {
-
-void Builtin::SetLoadPort(Dart_Port port) {
-  load_port_ = port;
-  ASSERT(load_port_ != ILLEGAL_PORT);
-  Dart_Handle field_name = DartUtils::NewString("_loadPort");
-  ASSERT(!Dart_IsError(field_name));
-  Dart_Handle builtin_lib =
-      Builtin::LoadAndCheckLibrary(Builtin::kBuiltinLibrary);
-  ASSERT(!Dart_IsError(builtin_lib));
-  Dart_Handle send_port = Dart_GetField(builtin_lib, field_name);
-  ASSERT(!Dart_IsError(send_port));
-  if (!Dart_IsNull(send_port)) {
-    // Already created and set.
-    return;
-  }
-  send_port = Dart_NewSendPort(load_port_);
-  ASSERT(!Dart_IsError(send_port));
-  Dart_Handle result = Dart_SetField(builtin_lib, field_name, send_port);
-  ASSERT(!Dart_IsError(result));
-}
-
-}  // namespace bin
-}  // namespace dart