Reapply change to hide VM-only List implementation classes.

runtime/bin/common.cc

Index: runtime/bin/common.cc
diff --git a/runtime/bin/common.cc b/runtime/bin/common.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5a98342d8661266784e0a0186a882f5d904e72a0
--- /dev/null
+++ b/runtime/bin/common.cc
@@ -0,0 +1,56 @@
+// 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 "bin/isolate_data.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));
+
+  // Fetch the cached builtin array types for this isolate.
+  IsolateData* isolate_data =
+      reinterpret_cast<IsolateData*>(Dart_CurrentIsolateData());
+  Dart_Handle object_array_class = isolate_data->object_array_class;
+  Dart_Handle growable_object_array_class =
+      isolate_data->growable_object_array_class;
+  Dart_Handle immutable_array_class = isolate_data->immutable_array_class;
+
+  // If we have not cached the class pointers in the isolate data,
+  // look them up and cache them now.
+  if (object_array_class == NULL) {
+    Dart_Handle coreimpl_lib =
+        Dart_LookupLibrary(Dart_NewString("dart:coreimpl"));
+    ASSERT(!Dart_IsError(coreimpl_lib));
+    object_array_class =
+        Dart_GetClass(coreimpl_lib, Dart_NewString("_ObjectArray"));
+    ASSERT(!Dart_IsError(object_array_class));
+    immutable_array_class =
+        Dart_GetClass(coreimpl_lib, Dart_NewString("_ImmutableArray"));
+    ASSERT(!Dart_IsError(immutable_array_class));
+    growable_object_array_class =
+        Dart_GetClass(coreimpl_lib, Dart_NewString("_GrowableObjectArray"));
+    ASSERT(!Dart_IsError(growable_object_array_class));
+    // Update the cache.
+    isolate_data->object_array_class =
+        Dart_NewPersistentHandle(object_array_class);
+    ASSERT(!Dart_IsError(isolate_data->object_array_class));
+    isolate_data->growable_object_array_class =
+        Dart_NewPersistentHandle(growable_object_array_class);
+    ASSERT(!Dart_IsError(isolate_data->growable_object_array_class));
+    isolate_data->immutable_array_class =
+        Dart_NewPersistentHandle(immutable_array_class);
+    ASSERT(!Dart_IsError(isolate_data->immutable_array_class));
+  }
+
+  bool builtin_array =
+      (Dart_IdentityEquals(list_class, growable_object_array_class) ||
+       Dart_IdentityEquals(list_class, object_array_class) ||
+       Dart_IdentityEquals(list_class, immutable_array_class));
+  Dart_SetReturnValue(args, Dart_NewBoolean(builtin_array));
+  Dart_ExitScope();
+}