Add API support for passing a C++ function as a microtask callback

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 3952 matching lines @@
     kAllocationActionAll = kAllocationActionAllocate | kAllocationActionFree
   };
 
 typedef void (*MemoryAllocationCallback)(ObjectSpace space,
                                          AllocationAction action,
                                          int size);
 
 // --- Leave Script Callback ---
 typedef void (*CallCompletedCallback)();
 
+// --- Microtask Callback ---
+typedef void (*MicrotaskCallback)(void* data);
+
 // --- Failed Access Check Callback ---
 typedef void (*FailedAccessCheckCallback)(Local<Object> target,
                                           AccessType type,
                                           Local<Value> data);
 
 // --- AllowCodeGenerationFromStrings callbacks ---
 
 /**
  * Callback to check if code generation from strings is allowed. See
  * Context::AllowCodeGenerationFromStrings.
@@ skipping 399 matching lines @@
    * Experimental: Runs the Microtask Work Queue until empty
    * Any exceptions thrown by microtask callbacks are swallowed.
    */
   void RunMicrotasks();
 
   /**
    * Experimental: Enqueues the callback to the Microtask Work Queue
    */
   void EnqueueMicrotask(Handle<Function> microtask);
 
+  /**
+   * Experimental: Enqueues the callback to the Microtask Work Queue
+   */
+  void EnqueueMicrotask(MicrotaskCallback microtask, void* data = NULL);
+
    /**
    * Experimental: Controls whether the Microtask Work Queue is automatically
    * run when the script call depth decrements to zero.
    */
   void SetAutorunMicrotasks(bool autorun);
 
   /**
    * Experimental: Returns whether the Microtask Work Queue is automatically
    * run when the script call depth decrements to zero.
    */
@@ skipping 2228 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_