relnote: QUIC bugfix (and test) for setting smaller receive window size

net/quic/quic_flow_controller.cc

 // Copyright 2014 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/quic/quic_flow_controller.h"
 
 #include "base/basictypes.h"
 #include "net/quic/quic_connection.h"
 #include "net/quic/quic_flags.h"
 #include "net/quic/quic_protocol.h"
@@ skipping 223 matching lines @@
   return SendWindowSize() == 0;
 }
 
 uint64 QuicFlowController::SendWindowSize() const {
   if (bytes_sent_ > send_window_offset_) {
     return 0;
   }
   return send_window_offset_ - bytes_sent_;
 }
 
+void QuicFlowController::UpdateReceiveWindowSize(QuicStreamOffset size) {
+  DVLOG(1) << ENDPOINT << "UpdateReceiveWindowSize for stream " << id_ << ": "
+           << size;
+  if (receive_window_size_ != receive_window_offset_) {
+    LOG(DFATAL) << "receive_window_size_:" << receive_window_size_
+                << " != receive_window_offset:" << receive_window_offset_;
+    return;
+  }
+  receive_window_size_ = size;
+  receive_window_offset_ = size;
+}
+
 }  // namespace net