Add DatagramClientSocket::BindToDefaultNetwork(),GetBoundNetwork()

net/android/network_change_notifier_android.cc

Index: net/android/network_change_notifier_android.cc
diff --git a/net/android/network_change_notifier_android.cc b/net/android/network_change_notifier_android.cc
index eac6589a8ef23ce88c33298923c733f61d570806..0654ca7bea79516c4965afbc5da365e41939e6df 100644
--- a/net/android/network_change_notifier_android.cc
+++ b/net/android/network_change_notifier_android.cc
@@ -173,9 +173,14 @@ NetworkChangeNotifierAndroid::GetCurrentNetworkConnectionType(
   return delegate_->GetNetworkConnectionType(network);
 }
 
-NetworkChangeNotifier::NetworkHandle
-NetworkChangeNotifierAndroid::GetCurrentDefaultNetwork() const {
-  return delegate_->GetCurrentDefaultNetwork();
+int NetworkChangeNotifierAndroid::GetCurrentDefaultNetwork(
+    NetworkChangeNotifier::NetworkHandle* network) const {
+  if (base::android::BuildInfo::GetInstance()->sdk_int() <
+      base::android::SDK_VERSION_LOLLIPOP) {
+    return ERR_NOT_IMPLEMENTED;
+  }
+  *network = delegate_->GetCurrentDefaultNetwork();
+  return OK;
 }
 
 void NetworkChangeNotifierAndroid::OnConnectionTypeChanged() {