Emit SignalReadyToSend even for "presumed writable" connections.

webrtc/p2p/base/port.cc

 /*
  *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 1088 matching lines @@
     if (network_cost != remote_candidate_.network_cost()) {
       remote_candidate_.set_network_cost(network_cost);
       // Network cost change will affect the connection ranking, so signal
       // state change to force a re-sort in P2PTransportChannel.
       SignalStateChange(this);
     }
   }
 }
 
 void Connection::OnReadyToSend() {
-  if (write_state_ == STATE_WRITABLE) {
-    SignalReadyToSend(this);
-  }
+  SignalReadyToSend(this);
 }
 
 void Connection::Prune() {
   if (!pruned_ || active()) {
     LOG_J(LS_INFO, this) << "Connection pruned";
     pruned_ = true;
     requests_.Clear();
     set_write_state(STATE_WRITE_TIMEOUT);
   }
 }
@@ skipping 450 matching lines @@
     ASSERT(sent < 0);
     error_ = port_->GetError();
     stats_.sent_discarded_packets++;
   } else {
     send_rate_tracker_.AddSamples(sent);
   }
   return sent;
 }
 
 }  // namespace cricket