Fix potential threading issues in NetworkChangeNotifierAndroid.

net/android/network_change_notifier_factory_android.cc

Index: net/android/network_change_notifier_factory_android.cc
diff --git a/net/android/network_change_notifier_factory_android.cc b/net/android/network_change_notifier_factory_android.cc
index a28a69e3463302f3e3c963ed79873c9243fb90d5..8ba7943588e8e67b3bd733700026ddc7d2186eab 100644
--- a/net/android/network_change_notifier_factory_android.cc
+++ b/net/android/network_change_notifier_factory_android.cc
@@ -8,12 +8,15 @@
 
 namespace net {
 
-NetworkChangeNotifierFactoryAndroid::NetworkChangeNotifierFactoryAndroid() {}
+NetworkChangeNotifierFactoryAndroid::NetworkChangeNotifierFactoryAndroid(
+    base::TaskRunner* ui_task_runner)
+    : ui_task_runner_(ui_task_runner) {
+}
 
 NetworkChangeNotifierFactoryAndroid::~NetworkChangeNotifierFactoryAndroid() {}
 
 NetworkChangeNotifier* NetworkChangeNotifierFactoryAndroid::CreateInstance() {
-  return new NetworkChangeNotifierAndroid();
+  return new NetworkChangeNotifierAndroid(ui_task_runner_);
 }
 
 }  // namespace net