objects-inl.h: Remove ACCESSORS_TO_SMI macro

src/heap/heap-inl.h

Index: src/heap/heap-inl.h
diff --git a/src/heap/heap-inl.h b/src/heap/heap-inl.h
index 6f7c060d70c9e53f41fd9802f21389920d2aec2b..d706030c265f36765fb2e5fb8bc4c4aa40dfa66d 100644
--- a/src/heap/heap-inl.h
+++ b/src/heap/heap-inl.h
@@ -684,12 +684,13 @@ uint32_t Heap::HashSeed() {
 }
 
 
-Smi* Heap::NextScriptId() {
-  int next_id = last_script_id()->value() + 1;
-  if (!Smi::IsValid(next_id) || next_id < 0) next_id = 1;
-  Smi* next_id_smi = Smi::FromInt(next_id);
-  set_last_script_id(next_id_smi);
-  return next_id_smi;
+int Heap::NextScriptId() {
+  if (last_script_id_ == Smi::kMaxValue) {
+    last_script_id_ = 1;
+  } else {
+    last_script_id_++;
+  }
+  return last_script_id_;
 }