Enable asynchronous remote debugging with d8.

src/d8.h

 // Copyright 2012 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 248 matching lines @@
   static Handle<Array> GetCompletions(Handle<String> text,
                                       Handle<String> full);
   static void OnExit();
   static int* LookupCounter(const char* name);
   static void* CreateHistogram(const char* name,
                                int min,
                                int max,
                                size_t buckets);
   static void AddHistogramSample(void* histogram, int sample);
   static void MapCounters(const char* name);
-#endif  // V8_SHARED
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
   static Handle<Object> DebugMessageDetails(Handle<String> message);
   static Handle<Value> DebugCommandToJSONRequest(Handle<String> command);
-#endif
+  static void DispatchDebugMessages();
+#endif  // ENABLE_DEBUGGER_SUPPORT
+#endif  // V8_SHARED
 
 #ifdef WIN32
 #undef Yield
 #endif
 
   static Handle<Value> Print(const Arguments& args);
   static Handle<Value> Write(const Arguments& args);
   static Handle<Value> Yield(const Arguments& args);
   static Handle<Value> Quit(const Arguments& args);
   static Handle<Value> Version(const Arguments& args);
@@ skipping 79 matching lines @@
                                            ExternalArrayType type,
                                            size_t element_size);
   static void ExternalArrayWeakCallback(Persistent<Value> object, void* data);
 };
 
 
 }  // namespace v8
 
 
 #endif  // V8_D8_H_