Change the D8 JavaScript debugger to fully use the JSON protocol....

src/d8.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 70 matching lines @@
   static void ReportException(TryCatch* try_catch);
   static void Initialize();
   static void OnExit();
   static int* LookupCounter(const char* name);
   static void MapCounters(const char* name);
   static Handle<String> ReadFile(const char* name);
   static void RunShell();
   static int Main(int argc, char* argv[]);
   static Handle<Array> GetCompletions(Handle<String> text,
                                       Handle<String> full);
-  static Handle<String> DebugEventToText(Handle<Object> event);
+  static Handle<String> DebugEventToText(Handle<String> event);
   static Handle<Value> DebugCommandToJSONRequest(Handle<String> command);
   static Handle<Object> DebugResponseDetails(Handle<String> response);
 
   static Handle<Value> Print(const Arguments& args);
   static Handle<Value> Quit(const Arguments& args);
   static Handle<Value> Version(const Arguments& args);
   static Handle<Value> Load(const Arguments& args);
 
   static Handle<Context> utility_context() { return utility_context_; }
 
@@ skipping 30 matching lines @@
   const char* name_;
   LineEditor* next_;
   static LineEditor* first_;
 };
 
 
 }  // namespace v8
 
 
 #endif  // V8_D8_H_