[HttpStreamParser]: Flush buffers as soon as request is sent.

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_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 173 matching lines @@
   // Parse the headers into response_.  Returns OK on success or a net::Error on
   // failure.
   int ParseResponseHeaders(int end_of_header_offset);
 
   // Examine the parsed headers to try to determine the response body size.
   void CalculateResponseBodySize();
 
   // Uploads statistics about status line compliance with RFC 7230.
   void ValidateStatusLine(const std::string& status_line);
 
+  // Flush buffers once the request is sent.
+  void FlushBuffers();
+
   // Next state of the request, when the current one completes.
   State io_state_;
 
   // The request to send.
   const HttpRequestInfo* request_;
 
   // The request header data.  May include a merged request body.
   scoped_refptr<DrainableIOBuffer> request_headers_;
 
   // Size of just the request headers.  May be less than the length of
@@ skipping 72 matching lines @@
   int upload_error_;
 
   base::WeakPtrFactory<HttpStreamParser> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpStreamParser);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_STREAM_PARSER_H_