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

test/cctest/test-api.cc

Index: test/cctest/test-api.cc
diff --git a/test/cctest/test-api.cc b/test/cctest/test-api.cc
index ee202c2e997216fcf68d285b3450bbfbc4ac60f7..e75023f6bd2511b59ec429f524969338dcdf2b5d 100644
--- a/test/cctest/test-api.cc
+++ b/test/cctest/test-api.cc
@@ -25983,8 +25983,9 @@ TEST(InternalFieldsOnGlobalProxy) {
   v8::HandleScope scope(isolate);
 
   v8::Local<v8::ObjectTemplate> obj_template = v8::ObjectTemplate::New(isolate);
+  obj_template->SetInternalFieldCount(1);
 
   v8::Local<v8::Context> context = Context::New(isolate, nullptr, obj_template);
   v8::Local<v8::Object> global = context->Global();
-  CHECK_EQ(v8::Context::kProxyInternalFieldCount, global->InternalFieldCount());
+  CHECK_EQ(1, global->InternalFieldCount());
 }