Revert "Limit the number of transitions allowed per hidden class." Due to crashes in ClearMapTransi…

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index 81eec5e3df5cf87ec111ee876bc222f5881f2c63..3a4b9c9d34d938cd79838fd6f0af37e264753c46 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -6584,8 +6584,7 @@ Handle<Map> Map::ShareDescriptor(Handle<Map> map,
     if (old_size == 0) {
       descriptors = DescriptorArray::Allocate(map->GetIsolate(), 0, 1);
     } else {
-      EnsureDescriptorSlack(
-          map, SlackForArraySize(old_size, kMaxNumberOfDescriptors));
+      EnsureDescriptorSlack(map, old_size < 4 ? 1 : old_size / 2);
       descriptors = handle(map->instance_descriptors());
     }
   }
@@ -6610,11 +6609,8 @@ void Map::ConnectTransition(Handle<Map> parent, Handle<Map> child,
     DCHECK(child->is_prototype_map());
   } else {
     Handle<TransitionArray> transitions =
-        TransitionArray::Insert(parent, name, child, flag);
-    if (!parent->HasTransitionArray() ||
-        *transitions != parent->transitions()) {
-      parent->set_transitions(*transitions);
-    }
+        TransitionArray::CopyInsert(parent, name, child, flag);
+    parent->set_transitions(*transitions);
     child->SetBackPointer(*parent);
   }
 }