Extend the use of IOBuffers to the code underneath...

net/base/socket.h

 // Copyright (c) 2006-2008 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 NET_BASE_SOCKET_H_
 #define NET_BASE_SOCKET_H_
 
 #include "net/base/completion_callback.h"
+#include "net/base/io_buffer.h"
 
 namespace net {
 
 // Represents a read/write socket.
 class Socket {
  public:
   virtual ~Socket() {}
 
   // Reads data, up to buf_len bytes, from the socket.  The number of bytes
   // read is returned, or an error is returned upon failure.  Zero is returned
   // to indicate end-of-file.  ERR_IO_PENDING is returned if the operation
   // could not be completed synchronously, in which case the result will be
-  // passed to the callback when available.
-  virtual int Read(char* buf, int buf_len,
+  // passed to the callback when available. If the operation is not completed
+  // immediately, the socket acquires a reference to the provided buffer until
+  // the callback is invoked or the socket is destroyed.
+  virtual int Read(IOBuffer* buf, int buf_len,
                    CompletionCallback* callback) = 0;
 
   // Writes data, up to buf_len bytes, to the socket.  Note: only part of the
   // data may be written!  The number of bytes written is returned, or an error
   // is returned upon failure.  ERR_IO_PENDING is returned if the operation
   // could not be completed synchronously, in which case the result will be
-  // passed to the callback when available.
-  virtual int Write(const char* buf, int buf_len,
+  // passed to the callback when available. If the operation is not completed
+  // immediately, the socket acquires a reference to the provided buffer until
+  // the callback is invoked or the socket is destroyed.
+  // Implementations of this method should not modify the contents of the actual
+  // buffer that is written to the socket.
+  virtual int Write(IOBuffer* buf, int buf_len,
                     CompletionCallback* callback) = 0;
 };
 
 }  // namespace net
 
 #endif  // NET_BASE_SOCKET_H_