[ic] [stubs] Don't use Code::flags in megamorphic stub cache hash computations.

src/objects.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/objects.h"
 
 #include <cmath>
 #include <iomanip>
 #include <sstream>
 
@@ skipping 17408 matching lines @@
 
 
 Handle<UnseededNumberDictionary> UnseededNumberDictionary::AddNumberEntry(
     Handle<UnseededNumberDictionary> dictionary,
     uint32_t key,
     Handle<Object> value) {
   SLOW_DCHECK(dictionary->FindEntry(key) == kNotFound);
   return Add(dictionary, key, value, PropertyDetails::Empty());
 }
 
+void UnseededNumberDictionary::DeleteKey(uint32_t key) {
+  int entry = FindEntry(key);
+  if (entry == kNotFound) return;
+
+  Factory* factory = GetIsolate()->factory();
+  SetEntry(entry, factory->the_hole_value(), factory->the_hole_value());
+  ElementRemoved();
+}
 
 Handle<SeededNumberDictionary> SeededNumberDictionary::AtNumberPut(
     Handle<SeededNumberDictionary> dictionary, uint32_t key,
     Handle<Object> value, bool used_as_prototype) {
   dictionary->UpdateMaxNumberKey(key, used_as_prototype);
   return AtPut(dictionary, key, value);
 }
 
 
 Handle<UnseededNumberDictionary> UnseededNumberDictionary::AtNumberPut(
@@ skipping 1495 matching lines @@
 
   Object* data_obj =
       constructor->shared()->get_api_func_data()->access_check_info();
   if (data_obj->IsUndefined(isolate)) return nullptr;
 
   return AccessCheckInfo::cast(data_obj);
 }
 
 }  // namespace internal
 }  // namespace v8