QUIC - clean up changes to keep in sync with internal source tree.

net/quic/quic_connection.cc

Index: net/quic/quic_connection.cc
diff --git a/net/quic/quic_connection.cc b/net/quic/quic_connection.cc
index f40b34dfe590af5b07e40d2d6115ad8c8e69a2ba..c6f1a0ca718dcf3df8df434c4e3de2acaac19da7 100644
--- a/net/quic/quic_connection.cc
+++ b/net/quic/quic_connection.cc
@@ -1698,6 +1698,9 @@ void QuicConnection::MaybeProcessUndecryptablePackets() {
   // never be able to be decrypted.
   if (encryption_level_ == ENCRYPTION_FORWARD_SECURE) {
     if (debug_visitor_.get() != NULL) {
+      // TODO(rtenneti): perhaps more efficient to pass the number of
+      // undecryptable packets as the argument to OnUndecryptablePacket so that
+      // we just need to call OnUndecryptablePacket once?
       for (size_t i = 0; i < undecryptable_packets_.size(); ++i) {
         debug_visitor_->OnUndecryptablePacket();
       }