FTP Transaction code for new Portable FTP(Patch SET-3)

net/ftp/ftp_transaction.h

Index: net/ftp/ftp_transaction.h
===================================================================
--- net/ftp/ftp_transaction.h	(revision 13921)
+++ net/ftp/ftp_transaction.h	(working copy)
@@ -6,18 +6,19 @@
 #define NET_FTP_FTP_TRANSACTION_H_
 
 #include "net/base/completion_callback.h"
+#include "net/base/io_buffer.h"
 #include "net/base/load_states.h"
 
+
 namespace net {
 
 class FtpRequestInfo;
 class FtpResponseInfo;
-
 // Represents a single FTP transaction.
 class FtpTransaction {
  public:
   // Stops any pending IO and destroys the transaction object.
-  virtual void Destroy() = 0;
+  virtual ~FtpTransaction() {}
 
   // Starts the FTP transaction (i.e., sends the FTP request).
   //
@@ -54,7 +55,8 @@
   //
   // NOTE: The transaction is not responsible for deleting the callback object.
   //
-  virtual int Read(char* buf, int buf_len, CompletionCallback* callback) = 0;
+  virtual int Read(IOBuffer* buf, int buf_len,
+      CompletionCallback* callback) = 0;
 
   // Returns the response info for this transaction or NULL if the response
   // info is not available.
@@ -64,7 +66,7 @@
   virtual LoadState GetLoadState() const = 0;
 
   // Returns the upload progress in bytes.  If there is no upload data,
-  // zero will be returned.  This does not include the request headers.
+  // zero will be returned.
   virtual uint64 GetUploadProgress() const = 0;
 };