Add an API to create a detached global object

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 7aad48b4daf2b78f26b8691f55061e478c925f8a..bb79a920f4ecb15c31557ce6c9196e68f19f49d3 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -7152,6 +7152,14 @@ class V8_EXPORT Context {
       Local<Value> global_object = Local<Value>());
 
   /**
+   * Returns an detached global that can be passed into Context::New.
+   *
+   * The global template needs to have access checks with handlers installed.
+   */
+  static Local<Object> NewDetachedGlobal(Isolate* isolate,
+                                         Local<ObjectTemplate> global_template);
+
+  /**
    * Sets the security token for the context.  To access an object in
    * another context, the security tokens must match.
    */