Return timestamp of the last recorded interval to the caller of HeapProfiler::GetHeapStats

src/heap-snapshot-generator.h

Index: src/heap-snapshot-generator.h
diff --git a/src/heap-snapshot-generator.h b/src/heap-snapshot-generator.h
index ef71ce6ff174836bb2d2b83bad6175a9b19b79ca..5859eb88b5d35b3c42d7a43cd834639e8356bf7f 100644
--- a/src/heap-snapshot-generator.h
+++ b/src/heap-snapshot-generator.h
@@ -219,7 +219,8 @@ class HeapObjectsMap {
   }
 
   void StopHeapObjectsTracking();
-  SnapshotObjectId PushHeapObjectsStats(OutputStream* stream);
+  SnapshotObjectId PushHeapObjectsStats(OutputStream* stream,
+                                        int64_t* timestamp_us);
   const List<TimeInterval>& samples() const { return time_intervals_; }
   size_t GetUsedMemorySize() const;