Current schema of calculation max_snapshot_js_object_id is not always correct.

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 d6adfea3dd24ebe4eb3e63d1c8c5ad5ac69c3eb9..44cd6094f341c164ef54db1cb84fb8ff9d50d162 100644
--- a/test/cctest/test-heap-profiler.cc
+++ b/test/cctest/test-heap-profiler.cc
@@ -424,12 +424,9 @@ TEST(HeapEntryIdsAndGC) {
   const v8::HeapSnapshot* snapshot2 =
       v8::HeapProfiler::TakeSnapshot(s2_str);
 
-  // Second snapshot has one more string, it is it's name 's2'.
-  CHECK(
-    snapshot1->GetMaxSnapshotJSObjectId() <=
-    snapshot2->GetMaxSnapshotJSObjectId() &&
-    snapshot2->GetMaxSnapshotJSObjectId() <=
-    snapshot1->GetMaxSnapshotJSObjectId() + i::HeapObjectsMap::kObjectIdStep);
+  CHECK(snapshot1->GetMaxSnapshotJSObjectId() > 7000);
+  CHECK(snapshot1->GetMaxSnapshotJSObjectId() <=
+        snapshot2->GetMaxSnapshotJSObjectId());
 
   const v8::HeapGraphNode* global1 = GetGlobalObject(snapshot1);
   const v8::HeapGraphNode* global2 = GetGlobalObject(snapshot2);