Add V8 debugger agent....

include/v8-debug.h

 // Copyright 2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 140 matching lines @@
   * current line of JavaScript execution.
   *
   * \code
   *   function frame_source_line(exec_state) {
   *     return exec_state.frame(0).sourceLine();
   *   }
   * \endcode
   */
   static Handle<Value> Call(v8::Handle<v8::Function> fun,
                             Handle<Value> data = Handle<Value>());
+
+ /**
+  * Enable the V8 builtin debug agent. The debugger agent will listen on the
+  * supplied TCP/IP port for remote debugger connection.
+  * \param port the TCP/IP port to listen on
+  */
+  static bool EnableAgent(int port);
 };
 
 
 }  // namespace v8
 
 
 #undef EXPORT
 
 
 #endif  // V8_DEBUG_H_