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

src/d8.cc

 // 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 214 matching lines @@
   Context::Scope context_scope(utility_context_);
   Handle<Object> global = utility_context_->Global();
   Handle<Value> fun = global->Get(String::New("GetCompletions"));
   static const int kArgc = 3;
   Handle<Value> argv[kArgc] = { evaluation_context_->Global(), text, full };
   Handle<Value> val = Handle<Function>::Cast(fun)->Call(global, kArgc, argv);
   return handle_scope.Close(Handle<Array>::Cast(val));
 }
 
 
-Handle<String> Shell::DebugEventToText(Handle<Object> event) {
+Handle<String> Shell::DebugEventToText(Handle<String> event) {
   HandleScope handle_scope;
   Context::Scope context_scope(utility_context_);
   Handle<Object> global = utility_context_->Global();
   Handle<Value> fun = global->Get(String::New("DebugEventToText"));
   TryCatch try_catch;
   try_catch.SetVerbose(true);
   static const int kArgc = 1;
   Handle<Value> argv[kArgc] = { event };
   Handle<Value> val = Handle<Function>::Cast(fun)->Call(global, kArgc, argv);
   if (try_catch.HasCaught()) {
@@ skipping 359 matching lines @@
   return 0;
 }
 
 
 }  // namespace v8
 
 
 int main(int argc, char* argv[]) {
   return v8::Shell::Main(argc, argv);
 }