Add an API to create a detached global object

include/v8.h

 // 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.
 
 /** \mainpage V8 API Reference Guide
  *
  * V8 is Google's open source JavaScript engine.
  *
  * This set of documents provides reference material generated from the
  * V8 header file, include/v8.h.
@@ skipping 7140 matching lines @@
    * global object for the newly created context will be created.
    *
    * \param global_object An optional global object to be reused for
    * the newly created context. This global object must have been
    * created by a previous call to Context::New with the same global
    * template. The state of the global object will be completely reset
    * and only object identify will remain.
    */
   static Local<Context> New(
       Isolate* isolate, ExtensionConfiguration* extensions = NULL,
-      Local<ObjectTemplate> global_template = Local<ObjectTemplate>(),
-      Local<Value> global_object = Local<Value>());
+      MaybeLocal<ObjectTemplate> global_template = MaybeLocal<ObjectTemplate>(),
+      MaybeLocal<Value> global_object = MaybeLocal<Value>());
 
   static MaybeLocal<Context> FromSnapshot(
       Isolate* isolate, size_t context_snapshot_index,
-      ExtensionConfiguration* extensions = NULL,
-      Local<ObjectTemplate> global_template = Local<ObjectTemplate>(),
-      Local<Value> global_object = Local<Value>());
+      ExtensionConfiguration* extensions = nullptr,
+      MaybeLocal<ObjectTemplate> global_template = MaybeLocal<ObjectTemplate>(),
+      MaybeLocal<Value> global_object = MaybeLocal<Value>());
+
+  /**
+   * Returns an global object that isn't backed by an actual context.
+   *
+   * The global template needs to have access checks with handlers installed.
+   * If an existing global object is passed in, the global object is detached
+   * from its context.
+   *
+   * Note that this is different from a detached context where all accesses to
+   * the global proxy will fail. Instead, the access check handlers are invoked.
+   *
+   * It is also not possible to detach an object returned by this method.
+   * Instead, the access check handlers need to return nothing to achieve the
+   * same effect.
+   *
+   * It is possible, however, the create a new context from the global object
+   * returned by this method.
+   */
+  static MaybeLocal<Object> NewRemoteContext(
+      Isolate* isolate, Local<ObjectTemplate> global_template,
+      MaybeLocal<Value> global_object = MaybeLocal<Value>());
 
   /**
    * Sets the security token for the context.  To access an object in
    * another context, the security tokens must match.
    */
   void SetSecurityToken(Local<Value> token);
 
   /** Restores the security token to the default value. */
   void UseDefaultSecurityToken();
 
@@ skipping 1735 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // INCLUDE_V8_H_