Land Recent QUIC Changes.

net/quic/quic_packet_writer.h

 // Copyright 2013 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_QUIC_QUIC_PACKET_WRITER_H_
 #define NET_QUIC_QUIC_PACKET_WRITER_H_
 
 #include "net/base/ip_endpoint.h"
 #include "net/quic/quic_protocol.h"
 
@@ skipping 16 matching lines @@
   virtual WriteResult WritePacket(
       const char* buffer, size_t buf_len,
       const net::IPAddressNumber& self_address,
       const net::IPEndPoint& peer_address,
       QuicBlockedWriterInterface* blocked_writer) = 0;
 
   // Returns true if the writer buffers and subsequently rewrites data
   // when an attempt to write results in the underlying socket becoming
   // write blocked.
   virtual bool IsWriteBlockedDataBuffered() const = 0;
+
+  // Returns true if the network socket is not writable.
+  virtual bool IsWriteBlocked() const = 0;
+
+  // Records that the socket has become writable, for example when an EPOLLOUT
+  // is received or an asynchronous write completes.
+  virtual void SetWritable() = 0;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_PACKET_WRITER_H_