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..8db653504654229489ed249b5a9afd47fc830e6f 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;
 }
@@ -364,6 +366,11 @@ void NetworkState::set_connection_state(const std::string connection_state) {
   connection_state_ = connection_state;
 }
 
+bool NetworkState::IsUsingMobileData() const {
+  return type() == shill::kTypeCellular || type() == chromeos::kTypeTether ||
+         tethering_state() == shill::kTetheringConfirmedState;
+}
+
 bool NetworkState::IsDynamicWep() const {
   return security_class_ == shill::kSecurityWep &&
          eap_key_mgmt_ == shill::kKeyManagementIEEE8021X;