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)
+    SocketPerformanceWatcherFactory::Protocol protocol,
+    const RTTCallback& rtt_callback,
+    const ResetCallback& reset_callback)
     : protocol_(protocol),
-      socket_performance_watcher_factory_(socket_performance_watcher_factory) {
-  DCHECK(socket_performance_watcher_factory_);
-
+      rtt_notification_received_count_(0),
+      rtt_callback_(rtt_callback),
+      reset_callback_(reset_callback) {
   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);
+    const base::TimeDelta& rtt) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+  rtt_notification_received_count_++;
+  rtt_callback_.Run(protocol_, rtt);
+}
+
+bool SocketPerformanceWatcher::ShouldNotifyUpdatedRTT() const {
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+  // Currently using a small value until crbug.com/590300 is fixed.
+  return rtt_notification_received_count_ < 1;
+}
+
+void SocketPerformanceWatcher::Reset() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+  rtt_notification_received_count_ = 0;
+  reset_callback_.Run();
 }
 
 }  // namespace net