Fix potential threading issues in NetworkChangeNotifierAndroid.

chrome/browser/chrome_browser_main_android.cc

 // Copyright (c) 2012 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 "chrome/browser/chrome_browser_main_android.h"
 
 #include "chrome/common/chrome_switches.h"
 #include "content/public/common/main_function_params.h"
 #include "net/android/network_change_notifier_factory_android.h"
 #include "net/base/network_change_notifier.h"
 
 ChromeBrowserMainPartsAndroid::ChromeBrowserMainPartsAndroid(
     const content::MainFunctionParams& parameters)
     : ChromeBrowserMainParts(parameters) {
 }
 
 ChromeBrowserMainPartsAndroid::~ChromeBrowserMainPartsAndroid() {
 }
 
 void ChromeBrowserMainPartsAndroid::PreEarlyInitialization() {
-  net::NetworkChangeNotifier::SetFactory(
-      new net::NetworkChangeNotifierFactoryAndroid());
-
   // Chrome on Android does not use default MessageLoop. It has its own
   // Android specific MessageLoop.
   DCHECK(!main_message_loop_.get());
   main_message_loop_.reset(new MessageLoop(MessageLoop::TYPE_UI));
+  net::NetworkChangeNotifier::SetFactory(
+      new net::NetworkChangeNotifierFactoryAndroid(
+          MessageLoop::current()->message_loop_proxy()));
+
   MessageLoopForUI::current()->Start();
 
   ChromeBrowserMainParts::PreEarlyInitialization();
 }
 
 void ChromeBrowserMainPartsAndroid::ShowMissingLocaleMessageBox() {
   NOTREACHED();
 }
 
 void RecordBreakpadStatusUMA(MetricsService* metrics) {
   // TODO: crbug.com/139023
   NOTIMPLEMENTED();
 }
 
 void WarnAboutMinimumSystemRequirements() {
 }