Add SocketWatcherFactory as a helper class to NQE

net/base/socket_performance_watcher.cc

-// Copyright 2015 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/base/socket_performance_watcher.h"
-
-#include "base/logging.h"
-
-namespace net {
-
-SocketPerformanceWatcher::SocketPerformanceWatcher(
-    const SocketPerformanceWatcherFactory::Protocol protocol,
-    SocketPerformanceWatcherFactory* socket_performance_watcher_factory)
-    : protocol_(protocol),
-      socket_performance_watcher_factory_(socket_performance_watcher_factory) {
-  DCHECK(socket_performance_watcher_factory_);
-
-  switch (protocol) {
-    case SocketPerformanceWatcherFactory::PROTOCOL_TCP:
-    case SocketPerformanceWatcherFactory::PROTOCOL_QUIC:
-      return;
-    default:
-      NOTREACHED();
-  }
-}
-
-SocketPerformanceWatcher::~SocketPerformanceWatcher() {}
-
-void SocketPerformanceWatcher::OnUpdatedRTTAvailable(
-    const base::TimeDelta& rtt) const {
-  socket_performance_watcher_factory_->OnUpdatedRTTAvailable(protocol_, rtt);
-}
-
-}  // namespace net