Set global proxy internal field count based on the global object template.

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 6058 matching lines @@
       proxy_template = ObjectTemplate::New(
           reinterpret_cast<v8::Isolate*>(isolate));
       proxy_constructor = EnsureConstructor(isolate, *proxy_template);
 
       // Set the global template to be the prototype template of
       // global proxy template.
       proxy_constructor->set_prototype_template(
           *Utils::OpenHandle(*global_template));
 
       proxy_template->SetInternalFieldCount(
-          v8::Context::kProxyInternalFieldCount);
+          global_template->InternalFieldCount());
 
       // Migrate security handlers from global_template to
       // proxy_template.  Temporarily removing access check
       // information from the global template.
       if (!global_constructor->access_check_info()->IsUndefined(isolate)) {
         proxy_constructor->set_access_check_info(
             global_constructor->access_check_info());
         proxy_constructor->set_needs_access_check(
             global_constructor->needs_access_check());
         global_constructor->set_needs_access_check(false);
@@ skipping 3550 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