chromeos: Split NetworkChangeNotifierChromeos initialization.

chrome/browser/chromeos/net/cros_network_change_notifier_factory.cc

Index: chrome/browser/chromeos/net/cros_network_change_notifier_factory.cc
diff --git a/chrome/browser/chromeos/net/cros_network_change_notifier_factory.cc b/chrome/browser/chromeos/net/cros_network_change_notifier_factory.cc
index ad38c6c97fa7dc5602d911deaf2609411d0a9c0b..2f210da1a2c24c33ec4be2fa5bd72e0defa47440 100644
--- a/chrome/browser/chromeos/net/cros_network_change_notifier_factory.cc
+++ b/chrome/browser/chromeos/net/cros_network_change_notifier_factory.cc
@@ -7,8 +7,21 @@
 
 namespace chromeos {
 
+namespace {
+
+NetworkChangeNotifierChromeos* g_network_change_notifier = NULL;
+
+}  // namespace
+
 net::NetworkChangeNotifier* CrosNetworkChangeNotifierFactory::CreateInstance() {
-  return new NetworkChangeNotifierChromeos();
+  DCHECK(!g_network_change_notifier);
+  g_network_change_notifier = new NetworkChangeNotifierChromeos();
+  return g_network_change_notifier;
+}
+
+// static
+NetworkChangeNotifierChromeos* CrosNetworkChangeNotifierFactory::GetInstance() {
+  return g_network_change_notifier;
 }
 
 }  // namespace net