net: Introduce SeekableIOBuffer and clean up HttpStreamParser.

net/http/http_stream_parser.h

 // Copyright (c) 2012 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_HTTP_HTTP_STREAM_PARSER_H_
 #define NET_HTTP_HTTP_STREAM_PARSER_H_
 #pragma once
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/string_piece.h"
 #include "net/base/completion_callback.h"
 #include "net/base/net_export.h"
 #include "net/base/net_log.h"
 #include "net/base/upload_data_stream.h"
 #include "net/http/http_chunked_decoder.h"
 
 namespace net {
 
 class ClientSocketHandle;
 class DrainableIOBuffer;
+class SeekableIOBuffer;

[wtc, 2012/02/02 20:22:57]

Nit: list in alphabetical order.

[satorux1, 2012/02/02 22:02:27]

Done.

 class GrowableIOBuffer;
 struct HttpRequestInfo;
 class HttpRequestHeaders;
 class HttpResponseInfo;
 class IOBuffer;
 class IOBufferWithSize;
 class SSLCertRequestInfo;
 class SSLInfo;
 
 class NET_EXPORT_PRIVATE HttpStreamParser  : public ChunkCallback {
@@ skipping 183 matching lines @@
   // The underlying socket.
   ClientSocketHandle* const connection_;
 
   BoundNetLog net_log_;
 
   // Callback to be used when doing IO.
   CompletionCallback io_callback_;
 
   // Stores an encoded chunk for chunked uploads.
   // Note: This should perhaps be improved to not create copies of the data.
-  scoped_refptr<IOBufferWithSize> raw_chunk_buf_;
-  // Wraps raw_chunk_buf_ to read the remaining data progressively.
-  scoped_refptr<DrainableIOBuffer> chunk_buf_;
+  scoped_refptr<SeekableIOBuffer> chunk_buf_;
   size_t chunk_length_without_encoding_;
   bool sent_last_chunk_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpStreamParser);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_STREAM_PARSER_H_