Introduce extras export object.

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 5475 matching lines @@
 
 
 void Context::DetachGlobal() {
   i::Handle<i::Context> context = Utils::OpenHandle(this);
   i::Isolate* isolate = context->GetIsolate();
   ENTER_V8(isolate);
   isolate->bootstrapper()->DetachGlobal(context);
 }
 
 
+MaybeLocal<v8::Object> Context::GetExtrasExportsObject() {
+  i::Handle<i::Context> context = Utils::OpenHandle(this);
+  i::Isolate* isolate = context->GetIsolate();
+  i::Object* extras_exports = context->extras_exports_object();
+  if (!extras_exports->IsJSObject()) return MaybeLocal<v8::Object>();
+  i::Handle<i::JSObject> exports(i::JSObject::cast(extras_exports), isolate);
+  return Utils::ToLocal(exports);
+}
+
+
 void Context::AllowCodeGenerationFromStrings(bool allow) {
   i::Handle<i::Context> context = Utils::OpenHandle(this);
   i::Isolate* isolate = context->GetIsolate();
   ENTER_V8(isolate);
   context->set_allow_code_gen_from_strings(
       allow ? isolate->heap()->true_value() : isolate->heap()->false_value());
 }
 
 
 bool Context::IsCodeGenerationFromStringsAllowed() {
@@ skipping 2530 matching lines @@
   Isolate* isolate = reinterpret_cast<Isolate*>(info.GetIsolate());
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 } }  // namespace v8::internal