Add jmi field for packets discarded due to network error

Also included the total packets attempted to send.

BUG=427555

Copied from https://webrtc-codereview.appspot.com/25959004/

R=harryjin@google.com, juberti@webrtc.org

Committed: https://code.google.com/p/webrtc/source/detail?r=7693

Review URL: https://webrtc-codereview.appspot.com/32039004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7713 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/p2p/base/port.cc b/webrtc/p2p/base/port.cc
index d71d6fa..1cda7c1 100644
--- a/webrtc/p2p/base/port.cc
+++ b/webrtc/p2p/base/port.cc
@@ -851,15 +851,28 @@
 // Connection
 //
 
-Connection::Connection(Port* port, size_t index,
+Connection::Connection(Port* port,
+                       size_t index,
                        const Candidate& remote_candidate)
-  : port_(port), local_candidate_index_(index),
-    remote_candidate_(remote_candidate), read_state_(STATE_READ_INIT),
-    write_state_(STATE_WRITE_INIT), connected_(true), pruned_(false),
-    use_candidate_attr_(false), remote_ice_mode_(ICEMODE_FULL),
-    requests_(port->thread()), rtt_(DEFAULT_RTT), last_ping_sent_(0),
-    last_ping_received_(0), last_data_received_(0),
-    last_ping_response_received_(0), reported_(false), state_(STATE_WAITING) {
+    : port_(port),
+      local_candidate_index_(index),
+      remote_candidate_(remote_candidate),
+      read_state_(STATE_READ_INIT),
+      write_state_(STATE_WRITE_INIT),
+      connected_(true),
+      pruned_(false),
+      use_candidate_attr_(false),
+      remote_ice_mode_(ICEMODE_FULL),
+      requests_(port->thread()),
+      rtt_(DEFAULT_RTT),
+      last_ping_sent_(0),
+      last_ping_received_(0),
+      last_data_received_(0),
+      last_ping_response_received_(0),
+      sent_packets_discarded_(0),
+      sent_packets_total_(0),
+      reported_(false),
+      state_(STATE_WAITING) {
   // All of our connections start in WAITING state.
   // TODO(mallinath) - Start connections from STATE_FROZEN.
   // Wire up to send stun packets
@@ -1348,6 +1361,14 @@
   return send_rate_tracker_.total_units();
 }
 
+size_t Connection::sent_discarded_packets() {
+  return sent_packets_discarded_;
+}
+
+size_t Connection::sent_total_packets() {
+  return sent_packets_total_;
+}
+
 void Connection::MaybeAddPrflxCandidate(ConnectionRequest* request,
                                         StunMessage* response) {
   // RFC 5245
@@ -1423,11 +1444,13 @@
     error_ = EWOULDBLOCK;
     return SOCKET_ERROR;
   }
+  sent_packets_total_++;
   int sent = port_->SendTo(data, size, remote_candidate_.address(),
                            options, true);
   if (sent <= 0) {
     ASSERT(sent < 0);
     error_ = port_->GetError();
+    sent_packets_discarded_++;
   } else {
     send_rate_tracker_.Update(sent);
   }