Add NetworkHandler to own network handlers in src/chromeos/network

chrome/browser/chromeos/net/connectivity_state_helper.cc

Index: chrome/browser/chromeos/net/connectivity_state_helper.cc
diff --git a/chrome/browser/chromeos/net/connectivity_state_helper.cc b/chrome/browser/chromeos/net/connectivity_state_helper.cc
index e7085ef9d454fceebccd2ed53c535db769cf983b..42549bebfbd9a1344819e4b66318f49133b74893 100644
--- a/chrome/browser/chromeos/net/connectivity_state_helper.cc
+++ b/chrome/browser/chromeos/net/connectivity_state_helper.cc
@@ -128,12 +128,12 @@ void ConnectivityStateHelper::RemoveNetworkManagerObserver(
 }
 
 ConnectivityStateHelperImpl::ConnectivityStateHelperImpl() {
-  network_state_handler_ = NetworkStateHandler::Get();
+  network_state_handler_ = NetworkHandler::Get()->network_state_handler();
   network_state_handler_->AddObserver(this);
 }
 
 ConnectivityStateHelperImpl::~ConnectivityStateHelperImpl() {
-  NetworkStateHandler::Get()->RemoveObserver(this);
+  network_state_handler_->RemoveObserver(this);
 }
 
 bool ConnectivityStateHelperImpl::IsConnected() {