Define Stable API for WebRTC/Quartc

net/quic/quartc/quartc_packet_writer.cc

Index: net/quic/quartc/quartc_packet_writer.cc
diff --git a/net/quic/quartc/quartc_packet_writer.cc b/net/quic/quartc/quartc_packet_writer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c1bb1c56828b1fd1bb105abe059044eb0575de4f
--- /dev/null
+++ b/net/quic/quartc/quartc_packet_writer.cc
@@ -0,0 +1,44 @@
+// Copyright (c) 2016 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/quartc/quartc_packet_writer.h"
+
+namespace net {
+QuartcPacketWriter::QuartcPacketWriter(
+    QuartcSessionInterface::Transport* transport)
+    : transport_(transport) {}
+
+WriteResult QuartcPacketWriter::WritePacket(const char* buffer,
+                                            size_t buf_len,
+                                            const IPAddress& self_address,
+                                            const IPEndPoint& peer_address,
+                                            PerPacketOptions* options) {
+  DCHECK(transport_);
+  int bytes_written = transport_->Write(buffer, buf_len);
+  if (bytes_written <= 0) {
+    return WriteResult(WRITE_STATUS_BLOCKED, EWOULDBLOCK);
+  }
+  return WriteResult(WRITE_STATUS_OK, bytes_written);
+}
+
+bool QuartcPacketWriter::IsWriteBlockedDataBuffered() const {
+  return false;
+}
+
+bool QuartcPacketWriter::IsWriteBlocked() const {
+  DCHECK(transport_);
+  return !transport_->CanWrite();
+}
+
+// TODO(zhihuang) To figure out what is the better value to return. The
+// transport in WebRTC network layer may become the bottleneck when determining
+// the MTU.
+QuicByteCount QuartcPacketWriter::GetMaxPacketSize(
+    const IPEndPoint& peer_address) const {
+  return kMaxPacketSize;
+}
+
+void QuartcPacketWriter::SetWritable() {}
+
+}  // namespace net