Add RegisterExternallyReferencedObject to PersistenValueMap

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index bc6edf5cea8ab4bb2d64e7716c8a8ddbb0fcd133..6af7d129291dd7123f81ad297fa86031098471d8 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -6624,6 +6624,14 @@ class V8_EXPORT V8 {
    */
   static void ShutdownPlatform();
 
+  /**
+   * Allows the embedder to tell the v8 garbage collector that a certain object
+   * is alive. Only allowed when the embedder is asked to trace its heap by
+   * EmbedderHeapTracer.
+   */
+  static void RegisterExternallyReferencedObject(internal::Object** object,

[jochen (gone - plz use gerrit), 2016/04/14 14:28:09]

this should stay private. Can you make the map a friend of V8 instead?

[Marcel Hlopko, 2016/04/14 14:50:42]

Done.

+                                                 internal::Isolate* isolate);
+
  private:
   V8();
 
@@ -6632,8 +6640,6 @@ class V8_EXPORT V8 {
   static internal::Object** CopyPersistent(internal::Object** handle);
   static void DisposeGlobal(internal::Object** global_handle);
   typedef WeakCallbackData<Value, void>::Callback WeakCallback;
-  static void RegisterExternallyReferencedObject(internal::Object** object,
-                                                 internal::Isolate* isolate);
   static void MakeWeak(internal::Object** global_handle, void* data,
                        WeakCallback weak_callback);
   static void MakeWeak(internal::Object** global_handle, void* data,