I'd like to add HeapSnapshot::GetMaxSnapshotJSObjectId function.

include/v8-profiler.h

Index: include/v8-profiler.h
diff --git a/include/v8-profiler.h b/include/v8-profiler.h
index 7a880963be6faa64d6ed4482e49b75f887608a8b..e36659fb48da438082baa47090c66ab77ca05da5 100644
--- a/include/v8-profiler.h
+++ b/include/v8-profiler.h
@@ -347,6 +347,9 @@ class V8EXPORT HeapSnapshot {
   /** Returns a node by index. */
   const HeapGraphNode* GetNode(int index) const;
 
+  /** Returns a max seen JS object Id. */
+  SnapshotObjectId GetMaxSnapshotJSObjectId() const;
+
   /**
    * Deletes the snapshot and removes it from HeapProfiler's list.
    * All pointers to nodes, edges and paths previously returned become