Move QuicAckListenerInterface, QuicPendingRetransmission, and QuicTransmissionInfo out of quic_pack…

net/quic/core/quic_ack_listener_interface.h

Index: net/quic/core/quic_ack_listener_interface.h
diff --git a/net/quic/core/quic_ack_listener_interface.h b/net/quic/core/quic_ack_listener_interface.h
new file mode 100644
index 0000000000000000000000000000000000000000..955721005116a84b0fd83c79f6d3bbdf408a09ac
--- /dev/null
+++ b/net/quic/core/quic_ack_listener_interface.h
@@ -0,0 +1,48 @@
+// 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.
+
+#ifndef NET_QUIC_CORE_QUIC_ACK_LISTENER_INTERFACE_H_
+#define NET_QUIC_CORE_QUIC_ACK_LISTENER_INTERFACE_H_
+
+#include "base/memory/ref_counted.h"
+#include "net/quic/core/quic_time.h"
+#include "net/quic/core/quic_types.h"
+
+namespace net {
+
+// Pure virtual class to listen for packet acknowledgements.
+class NET_EXPORT_PRIVATE QuicAckListenerInterface
+    : public base::RefCounted<QuicAckListenerInterface> {
+ public:
+  QuicAckListenerInterface() {}
+
+  // Called when a packet is acked.  Called once per packet.
+  // |acked_bytes| is the number of data bytes acked.
+  virtual void OnPacketAcked(int acked_bytes,
+                             QuicTime::Delta ack_delay_time) = 0;
+
+  // Called when a packet is retransmitted.  Called once per packet.
+  // |retransmitted_bytes| is the number of data bytes retransmitted.
+  virtual void OnPacketRetransmitted(int retransmitted_bytes) = 0;
+
+ protected:
+  friend class base::RefCounted<QuicAckListenerInterface>;
+
+  // Delegates are ref counted.
+  virtual ~QuicAckListenerInterface() {}
+};
+
+struct NET_EXPORT_PRIVATE AckListenerWrapper {
+  AckListenerWrapper(QuicAckListenerInterface* listener,
+                     QuicPacketLength data_length);
+  AckListenerWrapper(const AckListenerWrapper& other);
+  ~AckListenerWrapper();
+
+  scoped_refptr<QuicAckListenerInterface> ack_listener;
+  QuicPacketLength length;
+};
+
+}  // namespace net
+
+#endif  // NET_QUIC_CORE_QUIC_ACK_LISTENER_INTERFACE_H_