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

test/cctest/test-heap-profiler.cc

Index: test/cctest/test-heap-profiler.cc
diff --git a/test/cctest/test-heap-profiler.cc b/test/cctest/test-heap-profiler.cc
index fc74a35061a2d9f9577e07c5d948f5faac82ea10..e582ecd78dea68fedd1e75e930581b1840089243 100644
--- a/test/cctest/test-heap-profiler.cc
+++ b/test/cctest/test-heap-profiler.cc
@@ -1044,9 +1044,12 @@ static TestStatsStream GetHeapStatsUpdate(
     v8::HeapProfiler* heap_profiler,
     v8::SnapshotObjectId* object_id = NULL) {
   TestStatsStream stream;
-  v8::SnapshotObjectId last_seen_id = heap_profiler->GetHeapStats(&stream);
+  int64_t timestamp = -1;
+  v8::SnapshotObjectId last_seen_id =
+      heap_profiler->GetHeapStats(&stream, &timestamp);
   if (object_id)
     *object_id = last_seen_id;
+  CHECK_NE(-1, timestamp);
   CHECK_EQ(1, stream.eos_signaled());
   return stream;
 }