[SPDY] Avoid leaking bytes from the session flow control receive window

net/spdy/spdy_proxy_client_socket.cc

 // 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.
 
 #include "net/spdy/spdy_proxy_client_socket.h"
 
 #include <algorithm>  // min
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 199 matching lines @@
     user_buffer_len_ = static_cast<size_t>(buf_len);
     DCHECK(!callback.is_null());
     read_callback_ = callback;
     return ERR_IO_PENDING;
   }
   user_buffer_ = NULL;
   return result;
 }
 
 size_t SpdyProxyClientSocket::PopulateUserReadBuffer(char* data, size_t len) {
-  size_t bytes_consumed = read_buffer_queue_.Dequeue(data, len);
-
-  if (bytes_consumed > 0 && spdy_stream_)
-    spdy_stream_->IncreaseRecvWindowSize(bytes_consumed);
-
-  return bytes_consumed;
+  return read_buffer_queue_.Dequeue(data, len);
 }
 
 int SpdyProxyClientSocket::Write(IOBuffer* buf, int buf_len,
                                  const CompletionCallback& callback) {
   DCHECK(write_callback_.is_null());
   if (next_state_ != STATE_OPEN)
     return ERR_SOCKET_NOT_CONNECTED;
 
   DCHECK(spdy_stream_);
   write_bytes_outstanding_= buf_len;
@@ skipping 342 matching lines @@
   } else if (!read_callback_.is_null()) {
     // If we have a read_callback_, the we need to make sure we call it back.
     OnDataReceived(scoped_ptr<SpdyBuffer>());
   }
   // This may have been deleted by read_callback_, so check first.
   if (weak_ptr && !write_callback.is_null())
     write_callback.Run(ERR_CONNECTION_CLOSED);
 }
 
 }  // namespace net