Split SocketWatcher and SocketWatcherFactory out of NQE

net/nqe/socket_watcher.cc

+// Copyright 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/nqe/socket_watcher.h"
+
+#include "base/bind.h"
+#include "base/location.h"
+#include "base/single_thread_task_runner.h"
+#include "base/time/time.h"
+
+namespace net {
+
+namespace nqe {
+
+namespace internal {
+
+SocketWatcher::SocketWatcher(
+    SocketPerformanceWatcherFactory::Protocol protocol,
+    scoped_refptr<base::SingleThreadTaskRunner> task_runner,
+    OnUpdatedRTTAvailableCallback updated_rtt_observation_callback)
+    : protocol_(protocol),
+      task_runner_(std::move(task_runner)),
+      updated_rtt_observation_callback_(updated_rtt_observation_callback) {}
+
+SocketWatcher::~SocketWatcher() {}
+
+bool SocketWatcher::ShouldNotifyUpdatedRTT() const {
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+  return true;
+}
+
+void SocketWatcher::OnUpdatedRTTAvailable(const base::TimeDelta& rtt) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+  task_runner_->PostTask(
+      FROM_HERE, base::Bind(updated_rtt_observation_callback_, protocol_, rtt));
+}
+
+void SocketWatcher::OnConnectionChanged() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+}
+
+}  // namespace internal
+
+}  // namespace nqe
+
+}  // namespace net