[Cronet] Move NetworkChangeNotifier initialization off UI thread

components/cronet/android/cronet_library_loader.cc

Index: components/cronet/android/cronet_library_loader.cc
diff --git a/components/cronet/android/cronet_library_loader.cc b/components/cronet/android/cronet_library_loader.cc
index 6d4d11730c8c0cd7adb5e4f8711007a5841d9e15..a04ddc858e1fefb4ec4adadf3725c252d74745f2 100644
--- a/components/cronet/android/cronet_library_loader.cc
+++ b/components/cronet/android/cronet_library_loader.cc
@@ -22,6 +22,7 @@
 #include "components/cronet/android/cronet_upload_data_stream_adapter.h"
 #include "components/cronet/android/cronet_url_request_adapter.h"
 #include "components/cronet/android/cronet_url_request_context_adapter.h"
+#include "components/cronet/android/network_change_notifier_initer.h"
 #include "components/cronet/version.h"
 #include "jni/CronetLibraryLoader_jni.h"
 #include "net/android/net_jni_registrar.h"
@@ -50,14 +51,13 @@ const base::android::RegistrationMethod kCronetRegisteredMethods[] = {
     {"CronetUrlRequestContextAdapter",
      CronetUrlRequestContextAdapterRegisterJni},
     {"NetAndroid", net::android::RegisterJni},
+    {"NetworkChangeNotifierIniter", NetworkChangeNotifierIniterRegisterJni},
 };
 
 // MessageLoop on the main thread, which is where objects that receive Java
 // notifications generally live.
 base::MessageLoop* g_main_message_loop = nullptr;
 
-net::NetworkChangeNotifier* g_network_change_notifier = nullptr;
-
 bool RegisterJNI(JNIEnv* env) {
   return base::android::RegisterNativeMethods(
       env, kCronetRegisteredMethods, arraysize(kCronetRegisteredMethods));
@@ -100,10 +100,6 @@ void CronetInitOnMainThread(JNIEnv* env, const JavaParamRef<jclass>& jcaller) {
   DCHECK(!g_main_message_loop);
   g_main_message_loop = new base::MessageLoopForUI();
   base::MessageLoopForUI::current()->Start();
-  DCHECK(!g_network_change_notifier);
-  net::NetworkChangeNotifier::SetFactory(
-      new net::NetworkChangeNotifierFactoryAndroid());
-  g_network_change_notifier = net::NetworkChangeNotifier::Create();
 }
 
 ScopedJavaLocalRef<jstring> GetCronetVersion(