Remove devtools_bridge component

components/devtools_bridge/socket_tunnel_connection.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef COMPONENTS_DEVTOOLS_BRIDGE_SOCKET_TUNNEL_CONNECTION_H_
-#define COMPONENTS_DEVTOOLS_BRIDGE_SOCKET_TUNNEL_CONNECTION_H_
-
-#include <deque>
-#include <string>
-
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-
-namespace net {
-class DrainableIOBuffer;
-class GrowableIOBuffer;
-class IOBufferWithSize;
-class StreamSocket;
-}
-
-namespace devtools_bridge {
-
-/**
- * Abstract base class for SocketTunnelServer/Client connection.
- *
- * Connection binds a pair of net::StreamSocket (or alike) through
- * a data channel. SocketTunnel may handle up to kMaxConnectionCount
- * simultaneous connection (DevTools can keep ~10 connection;
- * other connections hang in unopened state; additional connections
- * could help to deal with data channel latency).
- *
- * Client should create net::StreamListenSocket (or logical equivalent)
- * and listen for incoming connection. When one comes it sends CLIENT_OPEN
- * packet to the server.
- *
- * Server transforms client's packet to calls of net::StreamSocket. On
- * CLIENT_OPEN it creates a socket and connects. If connection succeeds
- * it sends back SERVER_OPEN_ACK. If it fails it sends SERVER_CLOSE.
- *
- * After SERVER_OPEN_ACK server may send SERVER_CLOSE any time (if the socket
- * it connects to has closed on another side). If client closes the connection
- * sending CLIENT_CLOSE server acknowledges it by sending SERVER_CLOSE.
- * Client may reuse connection ID once it received SERVER_CLOSE (because
- * data channel is ordered and reliable).
- */
-class SocketTunnelConnection {
- public:
-  enum ClientOpCode {
-    CLIENT_OPEN = 0,
-    CLIENT_CLOSE = 1
-  };
-
-  enum ServerOpCode {
-    SERVER_OPEN_ACK = 0,
-    SERVER_CLOSE = 1
-  };
-
-  static const int kMaxConnectionCount = 64;
-
-  static const int kMaxPacketSizeBytes = 1024 * 4;
-  static const int kControlPacketSizeBytes = 3;
-
-  static const int kControlConnectionId = 0;
-
-  static const int kMinConnectionId = 1;
-  static const int kMaxConnectionId =
-      kMinConnectionId + kMaxConnectionCount - 1;
-
-  void Write(scoped_refptr<net::IOBufferWithSize> chunk);
-  void ReadNextChunk();
-
- protected:
-  SocketTunnelConnection(int index);
-  ~SocketTunnelConnection();
-
-  const int index_;
-
-  // |buffer| length must be kControlPacketSizeBytes.
-  void BuildControlPacket(char* buffer, int op_code);
-
-  virtual net::StreamSocket* socket() = 0;
-  virtual void OnDataPacketRead(const void* data, size_t length) = 0;
-  virtual void OnReadError(int error) = 0;
-
- private:
-  void WriteCurrent();
-  void OnWriteComplete(int result);
-  void OnReadComplete(int result);
-
-  std::deque<scoped_refptr<net::IOBufferWithSize> > buffer_;
-  scoped_refptr<net::DrainableIOBuffer> current_;
-  scoped_refptr<net::GrowableIOBuffer> read_buffer_;
-
-  DISALLOW_COPY_AND_ASSIGN(SocketTunnelConnection);
-};
-
-}  // namespace devtools_bridge
-
-#endif  // COMPONENTS_DEVTOOLS_BRIDGE_SOCKET_TUNNEL_CONNECTION_H_