Create optimized versions of the Map/Set clear method

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index e95ff10a4287445b8088d8fa865fa5c37ef49656..f585a469f9f8398fbfc152b4bf19357de909c2c7 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -15988,7 +15988,7 @@ Handle<Derived> OrderedHashTable<Derived, Iterator, entrysize>::Clear(
                table->GetHeap()->InNewSpace(*table) ? NOT_TENURED : TENURED);
 
   table->SetNextTable(*new_table);
-  table->SetNumberOfDeletedElements(-1);
+  table->SetNumberOfDeletedElements(kClearedTableSentinel);
 
   return new_table;
 }
@@ -16233,8 +16233,7 @@ void OrderedHashTableIterator<Derived, TableType>::Transition() {
     if (index > 0) {
       int nod = table->NumberOfDeletedElements();
 
-      // When we clear the table we set the number of deleted elements to -1.
-      if (nod == -1) {
+      if (nod == TableType::kClearedTableSentinel) {
         index = 0;
       } else {
         int old_index = index;