Move NetworkLoginObserver observer management to NetworkLibraryImplBase.

chrome/browser/chromeos/cros/network_library_impl_base.cc

Index: chrome/browser/chromeos/cros/network_library_impl_base.cc
diff --git a/chrome/browser/chromeos/cros/network_library_impl_base.cc b/chrome/browser/chromeos/cros/network_library_impl_base.cc
index 42f81d9199a2a04b3965652734834507c27dcd69..4f38eb8458d54175e53222052076e4aac4aabeaf 100644
--- a/chrome/browser/chromeos/cros/network_library_impl_base.cc
+++ b/chrome/browser/chromeos/cros/network_library_impl_base.cc
@@ -62,7 +62,8 @@ NetworkLibraryImplBase::NetworkLibraryImplBase()
       is_locked_(false),
       sim_operation_(SIM_OPERATION_NONE),
       ALLOW_THIS_IN_INITIALIZER_LIST(notify_manager_weak_factory_(this)) {
-  network_login_observer_.reset(new NetworkLoginObserver(this));
+  network_login_observer_.reset(new NetworkLoginObserver());
+  AddNetworkManagerObserver(network_login_observer_.get());
 }
 
 NetworkLibraryImplBase::~NetworkLibraryImplBase() {