Move IOThread::LoggingNetworkChangeObserver to net/base

net/base/logging_network_change_observer.cc

Index: net/base/logging_network_change_observer.cc
diff --git a/net/base/logging_network_change_observer.cc b/net/base/logging_network_change_observer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..871a44abbb4f08836ffd6696e245dffb48e0a70d
--- /dev/null
+++ b/net/base/logging_network_change_observer.cc
@@ -0,0 +1,58 @@
+// Copyright (c) 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/base/logging_network_change_observer.h"
+
+#include <string>
+
+#include "base/logging.h"
+#include "net/log/net_log.h"
+
+namespace net {
+
+LoggingNetworkChangeObserver::LoggingNetworkChangeObserver(net::NetLog* net_log)
+    : net_log_(net_log) {
+  net::NetworkChangeNotifier::AddIPAddressObserver(this);
+  net::NetworkChangeNotifier::AddConnectionTypeObserver(this);
+  net::NetworkChangeNotifier::AddNetworkChangeObserver(this);
+}
+
+LoggingNetworkChangeObserver::~LoggingNetworkChangeObserver() {
+  net::NetworkChangeNotifier::RemoveIPAddressObserver(this);
+  net::NetworkChangeNotifier::RemoveConnectionTypeObserver(this);
+  net::NetworkChangeNotifier::RemoveNetworkChangeObserver(this);
+}
+
+void LoggingNetworkChangeObserver::OnIPAddressChanged() {
+  VLOG(1) << "Observed a change to the network IP addresses";
+
+  net_log_->AddGlobalEntry(net::NetLog::TYPE_NETWORK_IP_ADDRESSES_CHANGED);
+}
+
+void LoggingNetworkChangeObserver::OnConnectionTypeChanged(
+    net::NetworkChangeNotifier::ConnectionType type) {
+  std::string type_as_string =
+      net::NetworkChangeNotifier::ConnectionTypeToString(type);
+
+  VLOG(1) << "Observed a change to network connectivity state "
+          << type_as_string;
+
+  net_log_->AddGlobalEntry(
+      net::NetLog::TYPE_NETWORK_CONNECTIVITY_CHANGED,
+      net::NetLog::StringCallback("new_connection_type", &type_as_string));
+}
+
+void LoggingNetworkChangeObserver::OnNetworkChanged(
+    net::NetworkChangeNotifier::ConnectionType type) {
+  std::string type_as_string =
+      net::NetworkChangeNotifier::ConnectionTypeToString(type);
+
+  VLOG(1) << "Observed a network change to state " << type_as_string;
+
+  net_log_->AddGlobalEntry(
+      net::NetLog::TYPE_NETWORK_CHANGED,
+      net::NetLog::StringCallback("new_connection_type", &type_as_string));
+}
+
+}  // namespace net