Treat tethered networks as mobile networks

chromeos/network/network_state.cc

Index: chromeos/network/network_state.cc
diff --git a/chromeos/network/network_state.cc b/chromeos/network/network_state.cc
index dff74c4c3968a324842b1ae2bc6d4f602afa471c..6c99661afc07d780b6eaa49c1e6b05c5343a548b 100644
--- a/chromeos/network/network_state.cc
+++ b/chromeos/network/network_state.cc
@@ -201,6 +201,8 @@ bool NetworkState::PropertyChanged(const std::string& key,
 
     vpn_provider_type_ = vpn_provider_type;
     return true;
+  } else if (key == shill::kTetheringProperty) {
+    return GetStringValue(key, value, &tethering_state_);
   }
   return false;
 }