Add V8 debugger agent....

src/api.cc

 // Copyright 2007-2008 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 2942 matching lines @@
   } else {
     result = i::Debugger::Call(Utils::OpenHandle(*fun),
                                Utils::OpenHandle(*data),
                                &has_pending_exception);
   }
   EXCEPTION_BAILOUT_CHECK(Local<Value>());
   return Utils::ToLocal(result);
 }
 
 
+bool Debug::EnableAgent(int port) {
+  return i::Debugger::StartAgent(port);
+}
+
+
 namespace internal {
 
 
 HandleScopeImplementer* HandleScopeImplementer::instance() {
   return &thread_local;
 }
 
 
 char* HandleScopeImplementer::ArchiveThread(char* storage) {
   return thread_local.ArchiveThreadHelper(storage);
@@ skipping 61 matching lines @@
       reinterpret_cast<HandleScopeImplementer*>(storage);
   List<void**>* blocks_of_archived_thread = thread_local->Blocks();
   v8::ImplementationUtilities::HandleScopeData* handle_data_of_archived_thread =
       &thread_local->handle_scope_data_;
   Iterate(v, blocks_of_archived_thread, handle_data_of_archived_thread);
 
   return storage + ArchiveSpacePerThread();
 }
 
 } }  // namespace v8::internal