Make QuicDispatcher's helper and alarm factory arguments unique_ptrs to make ownership clear.

net/quic/quic_chromium_alarm_factory.h

+// 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.
+//
+// The Chrome-specific AlarmFactory for QuicConnection which uses
+// a TaskRunner for alarms.
+
+#ifndef NET_QUIC_QUIC_CHROMIUM_ALARM_FACTORY_H_
+#define NET_QUIC_QUIC_CHROMIUM_ALARM_FACTORY_H_
+
+#include <set>
+
+#include "base/macros.h"
+#include "net/quic/quic_alarm_factory.h"
+#include "net/quic/quic_connection.h"
+#include "net/quic/quic_protocol.h"
+#include "net/quic/quic_simple_buffer_allocator.h"
+#include "net/quic/quic_time.h"
+#include "net/udp/datagram_client_socket.h"
+
+namespace base {
+class TaskRunner;
+}  // namespace base
+
+namespace net {
+
+class QuicClock;
+class QuicRandom;
+
+class NET_EXPORT_PRIVATE QuicChromiumAlarmFactory : public QuicAlarmFactory {
+ public:
+  QuicChromiumAlarmFactory(base::TaskRunner* task_runner,
+                           const QuicClock* clock);
+  QuicAlarm* CreateAlarm(QuicAlarm::Delegate* delegate) override;
+  QuicArenaScopedPtr<QuicAlarm> CreateAlarm(
+      QuicArenaScopedPtr<QuicAlarm::Delegate> delegate,
+      QuicConnectionArena* arena) override;
+
+ private:
+  base::TaskRunner* task_runner_;
+  const QuicClock* clock_;
+};
+
+}  // namespace net
+
+#endif  // NET_QUIC_QUIC_CHROMIUM_ALARM_FACTORY_H_