Allow embedder to set promise internal field count

src/bootstrapper.cc

 // Copyright 2014 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/bootstrapper.h"
 
 #include "src/accessors.h"
 #include "src/api-natives.h"
 #include "src/base/ieee754.h"
 #include "src/code-stubs.h"
@@ skipping 2088 matching lines @@
     Handle<JSFunction> new_promise_capability =
         SimpleCreateFunction(isolate, factory->empty_string(),
                              Builtins::kNewPromiseCapability, 2, false);
     InstallWithIntrinsicDefaultProto(isolate, new_promise_capability,
                                      Context::NEW_PROMISE_CAPABILITY_INDEX);
   }
 
   {  // -- P r o m i s e
     Handle<JSObject> prototype =
         factory->NewJSObject(isolate->object_function(), TENURED);
-    Handle<JSFunction> promise_fun =
-        InstallFunction(global, "Promise", JS_PROMISE_TYPE, JSPromise::kSize,
-                        prototype, Builtins::kPromiseConstructor);
+    Handle<JSFunction> promise_fun = InstallFunction(
+        global, "Promise", JS_PROMISE_TYPE, JSPromise::kSizeWithEmbedderFields,
+        prototype, Builtins::kPromiseConstructor);
     InstallWithIntrinsicDefaultProto(isolate, promise_fun,
                                      Context::PROMISE_FUNCTION_INDEX);
 
     Handle<SharedFunctionInfo> shared(promise_fun->shared(), isolate);
     shared->SetConstructStub(*isolate->builtins()->JSBuiltinsConstructStub());
     shared->set_instance_class_name(isolate->heap()->Object_string());
     shared->set_internal_formal_parameter_count(1);
     shared->set_length(1);
 
     // Install the "constructor" property on the {prototype}.
@@ skipping 3161 matching lines @@
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 }  // namespace internal
 }  // namespace v8