--verify-predictable mode added for ensuring that GC behaves deterministically.

src/builtins.cc

Index: src/builtins.cc
diff --git a/src/builtins.cc b/src/builtins.cc
index 503d9a6d962dcb19638542d6c705507ee4a335dc..08ca1225282343aaca81a884b56d4bcaf6afcbca 100644
--- a/src/builtins.cc
+++ b/src/builtins.cc
@@ -239,12 +239,8 @@ static FixedArrayBase* LeftTrimFixedArray(Heap* heap,
 
   FixedArrayBase* new_elms =
       FixedArrayBase::cast(HeapObject::FromAddress(new_start));
-  HeapProfiler* profiler = heap->isolate()->heap_profiler();
-  if (profiler->is_tracking_object_moves()) {
-    profiler->ObjectMoveEvent(elms->address(),
-                              new_elms->address(),
-                              new_elms->Size());
-  }
+
+  heap->OnMoveEvent(new_elms, elms, new_elms->Size());
   return new_elms;
 }