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

src/serialize.cc

Index: src/serialize.cc
diff --git a/src/serialize.cc b/src/serialize.cc
index 118961be3292accf5fc94938752372c825e43580..b5cb478cdfde65a3663bd9757d26fb291bb0c615 100644
--- a/src/serialize.cc
+++ b/src/serialize.cc
@@ -850,6 +850,7 @@ void Deserializer::ReadObject(int space_number,
   int size = source_->GetInt() << kObjectAlignmentBits;
   Address address = Allocate(space_number, size);
   HeapObject* obj = HeapObject::FromAddress(address);
+  isolate_->heap()->OnAllocationEvent(obj, size);
   *write_back = obj;
   Object** current = reinterpret_cast<Object**>(address);
   Object** limit = current + (size >> kPointerSizeLog2);