De-Clientize UDPSocket service

mojo/services/network/public/cpp/udp_socket_wrapper.cc

Index: mojo/services/network/public/cpp/udp_socket_wrapper.cc
diff --git a/mojo/services/network/public/cpp/udp_socket_wrapper.cc b/mojo/services/network/public/cpp/udp_socket_wrapper.cc
index 4510c273f17fdc6fadbee9095c0360ce20407248..9c083f887806cea17f3f45508419117a3ac29581 100644
--- a/mojo/services/network/public/cpp/udp_socket_wrapper.cc
+++ b/mojo/services/network/public/cpp/udp_socket_wrapper.cc
@@ -47,7 +47,8 @@ UDPSocketWrapper::SendRequest::SendRequest() {}
 UDPSocketWrapper::SendRequest::~SendRequest() {}
 
 UDPSocketWrapper::UDPSocketWrapper(UDPSocketPtr socket)
-  : socket_(socket.Pass()),
+  : binding_(this),
+    socket_(socket.Pass()),
     max_receive_queue_size_(kDefaultReceiveQueueSlots),
     max_pending_sends_(1),
     current_pending_sends_(0) {
@@ -57,7 +58,8 @@ UDPSocketWrapper::UDPSocketWrapper(UDPSocketPtr socket)
 UDPSocketWrapper::UDPSocketWrapper(UDPSocketPtr socket,
                                    uint32_t receive_queue_slots,
                                    uint32_t requested_max_pending_sends)
-  : socket_(socket.Pass()),
+  : binding_(this),
+    socket_(socket.Pass()),
     max_receive_queue_size_(receive_queue_slots),
     max_pending_sends_(1),
     current_pending_sends_(0) {
@@ -159,7 +161,9 @@ void UDPSocketWrapper::OnReceived(NetworkErrorPtr result,
 }
 
 void UDPSocketWrapper::Initialize(uint32_t requested_max_pending_sends) {
-  socket_.set_client(this);
+  UDPSocketReceiverPtr receiver_proxy;
+  binding_.Bind(&receiver_proxy);

[jamesr, 2015/01/28 20:48:37]

this isn't wrong, but it's a bit confusing (imho). i prefer always associating
Binding<>s with InterfaceRequest<>s i.e.

UDPSocketReceiverPtr receiver;
binding_.Bind(GetProxy(&receiver));  // <-- this creates the message pipe etc
and returns an InterfaceRequest<UDPSocketReciever>
socket_->SetReceiver(receiver.Pass());

+  socket_->SetReceiver(receiver_proxy.Pass());
   socket_->NegotiateMaxPendingSendRequests(
       requested_max_pending_sends,
       Callback<void(uint32_t)>(