I'd like to introduce kSynthetic type of nodes for Heap Profiler.

include/v8-profiler.h

Index: include/v8-profiler.h
diff --git a/include/v8-profiler.h b/include/v8-profiler.h
index bcca65edbcab607196694d06e15b2464828f5253..2ec8aefad08b45c7d1d456146937462347b4535a 100644
--- a/include/v8-profiler.h
+++ b/include/v8-profiler.h
@@ -255,7 +255,11 @@ class V8EXPORT HeapGraphNode {
     kClosure = 5,     // Function closure.
     kRegExp = 6,      // RegExp.
     kHeapNumber = 7,  // Number stored in the heap.
-    kNative = 8       // Native object (not from V8 heap).
+    kNative = 8,      // Native object (not from V8 heap).
+    kArtificial = 9   // Artificial object, usualy used for grouping

[mnaganov (inactive), 2012/02/06 15:37:22]

Agreed offline to renamed this to kSynthetic. And please consider updating the
comment, or explain why do you want to leave it as is.

+                      // snapshot items together for reducing
+                      // postprocessing steps.
+                      // example - group of detached DOM trees.
   };
 
   /** Returns node type (see HeapGraphNode::Type). */