Revert "Remove our own debugger implementation"

This reverts commit 1d148fe2fb.

atom/browser/node_debugger.h

@@ -0,0 +1,59 @@
+// Copyright (c) 2014 GitHub, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#ifndef ATOM_BROWSER_NODE_DEBUGGER_H_
+#define ATOM_BROWSER_NODE_DEBUGGER_H_
+
+#include <string>
+
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "base/threading/thread.h"
+#include "net/socket/stream_listen_socket.h"
+#include "v8/include/v8-debug.h"
+
+namespace atom {
+
+// Add support for node's "--debug" switch.
+class NodeDebugger : public net::StreamListenSocket::Delegate {
+ public:
+  explicit NodeDebugger(v8::Isolate* isolate);
+  virtual ~NodeDebugger();
+
+  bool IsRunning() const;
+
+ private:
+  void StartServer(int port);
+  void CloseSession();
+  void OnMessage(const std::string& message);
+  void SendMessage(const std::string& message);
+  void SendConnectMessage();
+
+  static void DebugMessageHandler(const v8::Debug::Message& message);
+
+  // net::StreamListenSocket::Delegate:
+  void DidAccept(net::StreamListenSocket* server,
+                 scoped_ptr<net::StreamListenSocket> socket) override;
+  void DidRead(net::StreamListenSocket* socket,
+               const char* data,
+               int len) override;
+  void DidClose(net::StreamListenSocket* socket) override;
+
+  v8::Isolate* isolate_;
+
+  base::Thread thread_;
+  scoped_ptr<net::StreamListenSocket> server_;
+  scoped_ptr<net::StreamListenSocket> accepted_socket_;
+
+  std::string buffer_;
+  int content_length_;
+
+  base::WeakPtrFactory<NodeDebugger> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(NodeDebugger);
+};
+
+}  // namespace atom
+
+#endif  // ATOM_BROWSER_NODE_DEBUGGER_H_