[base] Revert "Move hashmap allocator to a field"

src/ast/ast.cc

Index: src/ast/ast.cc
diff --git a/src/ast/ast.cc b/src/ast/ast.cc
index 4fbbd2a44d9fa95064e76b3c621836dcad7f85d9..18e88310002a7ba497e1f2fa4356db68c445408c 100644
--- a/src/ast/ast.cc
+++ b/src/ast/ast.cc
@@ -472,7 +472,7 @@ void ObjectLiteral::CalculateEmitStore(Zone* zone) {
     // If there is an existing entry do not emit a store unless the previous
     // entry was also an accessor.
     uint32_t hash = literal->Hash();
-    ZoneHashMap::Entry* entry = table.LookupOrInsert(literal, hash);
+    ZoneHashMap::Entry* entry = table.LookupOrInsert(literal, hash, allocator);
     if (entry->value != NULL) {
       auto previous_kind =
           static_cast<ObjectLiteral::Property*>(entry->value)->kind();