Split out QuicAlarm creation from QuicConnectionHelper to new QuicAlarmFactory. No behavior change,…

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 helper for QuicConnection which uses
+// a TaskRunner for alarms, and uses a DatagramClientSocket for writing data.
+
+#ifndef NET_QUIC_QUIC_CHROMIUM_ALARM_FACTORY_H_
+#define NET_QUIC_QUIC_CHROMIUM_ALARM_FACTORY_H_
+
+#include <set>
+
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "net/quic/quic_alarm_factory.h"
+#include "net/quic/quic_clock.h"
+#include "net/quic/quic_protocol.h"
+#include "net/quic/quic_time.h"
+
+namespace base {
+class TaskRunner;
+}  // namespace base
+
+namespace net {
+
+class NET_EXPORT_PRIVATE QuicChromiumAlarmFactory
+    : public QuicAlarmFactory {
+ public:
+  QuicChromiumAlarmFactory(base::TaskRunner* task_runner,
+                           const QuicClock* clock);
+  ~QuicChromiumAlarmFactory() override;
+
+  // QuicAlarmFactory
+  QuicAlarm* CreateAlarm(QuicAlarm::Delegate* delegate) override;
+  QuicArenaScopedPtr<QuicAlarm> CreateAlarm(
+      QuicArenaScopedPtr<QuicAlarm::Delegate> delegate,
+      QuicConnectionArena* arena) override;
+
+ private:
+  base::TaskRunner* task_runner_;
+  const QuicClock* clock_;
+  base::WeakPtrFactory<QuicChromiumAlarmFactory> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(QuicChromiumAlarmFactory);
+};
+
+}  // namespace net
+
+#endif  // NET_QUIC_QUIC_CHROMIUM_ALARM_FACTORY_H_