Increment descriptor array slack for prototypes by a constant rather than 50%

src/api.cc

 // Copyright 2012 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/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 886 matching lines @@
 void NeanderArray::set(int index, i::Object* value) {
   if (index < 0 || index >= this->length()) return;
   obj_.set(index + 1, value);
 }
 
 
 // --- T e m p l a t e ---
 
 
 static void InitializeTemplate(i::Handle<i::TemplateInfo> that, int type) {
+  that->set_number_of_properties(0);
   that->set_tag(i::Smi::FromInt(type));
 }
 
 
 void Template::Set(v8::Handle<Name> name,
                    v8::Handle<Data> value,
                    v8::PropertyAttribute attribute) {
   auto templ = Utils::OpenHandle(this);
   i::Isolate* isolate = templ->GetIsolate();
   ENTER_V8(isolate);
@@ skipping 22 matching lines @@
   i::ApiNatives::AddAccessorProperty(
       isolate, templ, Utils::OpenHandle(*name),
       Utils::OpenHandle(*getter, true), Utils::OpenHandle(*setter, true),
       static_cast<PropertyAttributes>(attribute));
 }
 
 
 // --- F u n c t i o n   T e m p l a t e ---
 static void InitializeFunctionTemplate(
     i::Handle<i::FunctionTemplateInfo> info) {
-  info->set_tag(i::Smi::FromInt(Consts::FUNCTION_TEMPLATE));
+  InitializeTemplate(info, Consts::FUNCTION_TEMPLATE);
   info->set_flag(0);
 }
 
 
 Local<ObjectTemplate> FunctionTemplate::PrototypeTemplate() {
   i::Isolate* i_isolate = Utils::OpenHandle(this)->GetIsolate();
   ENTER_V8(i_isolate);
   i::Handle<i::Object> result(Utils::OpenHandle(this)->prototype_template(),
                               i_isolate);
   if (result->IsUndefined()) {
@@ skipping 7477 matching lines @@
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 }  // namespace internal
 }  // namespace v8