Revert hiding of VM-only coreimpl list implementation types. While I

runtime/bin/common.cc

Index: runtime/bin/common.cc
diff --git a/runtime/bin/common.cc b/runtime/bin/common.cc
deleted file mode 100644
index 84d4dbabc82937591909321890d795dd6415342d..0000000000000000000000000000000000000000
--- a/runtime/bin/common.cc
+++ /dev/null
@@ -1,28 +0,0 @@
-// Copyright (c) 2012, 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 "bin/builtin.h"
-
-#include "include/dart_api.h"
-
-void FUNCTION_NAME(Common_IsBuiltinList)(Dart_NativeArguments args) {
-  Dart_EnterScope();
-  Dart_Handle list = Dart_GetNativeArgument(args, 0);
-  Dart_Handle list_class = Dart_InstanceGetClass(list);
-  ASSERT(!Dart_IsError(list_class));
-  Dart_Handle coreimpl_lib =
-      Dart_LookupLibrary(Dart_NewString("dart:coreimpl"));
-  ASSERT(!Dart_IsError(coreimpl_lib));
-  Dart_Handle object_array_class =
-      Dart_GetClass(coreimpl_lib, Dart_NewString("_ObjectArray"));
-  ASSERT(!Dart_IsError(object_array_class));
-  Dart_Handle immutable_array_class =
-      Dart_GetClass(coreimpl_lib, Dart_NewString("_ImmutableArray"));
-  ASSERT(!Dart_IsError(immutable_array_class));
-  // TODO(5474): We should be able to allow _GrowableObjectArrays here as well.
-  bool builtin_array = (Dart_IdentityEquals(list_class, object_array_class) ||
-                        Dart_IdentityEquals(list_class, immutable_array_class));
-  Dart_SetReturnValue(args, Dart_NewBoolean(builtin_array));
-  Dart_ExitScope();
-}