[WIP] New GC related APIs.

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 8dabef0d5885448bfdd590c37f88ab4dfe8218a0..a7ede84ba5f38cd08f59d936948a9604e09f3453 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -3440,6 +3440,8 @@ class V8EXPORT V8 {
    * for partially dependent handles only.
    * See v8-profiler.h for RetainedObjectInfo interface description.
    */
+  // TODO(marja): deprecate AddObjectGroup. Use SetObjectGroupID and
+  // SetRetainedObjectInfo instead.
   static void AddObjectGroup(Persistent<Value>* objects,
                              size_t length,
                              RetainedObjectInfo* info = NULL);
@@ -3448,6 +3450,14 @@ class V8EXPORT V8 {
                              size_t length,
                              RetainedObjectInfo* info = NULL);
 
+  static void SetObjectGroupId(Isolate* isolate,
+                               const Persistent<Value>& object,
+                               void* id);
+
+  static void SetRetainedObjectInfo(Isolate* isolate,
+                                    void* id,
+                                    RetainedObjectInfo* info);
+
   /**
    * Allows the host application to declare implicit references between
    * the objects: if |parent| is alive, all |children| are alive too.