Expose RTCPeerConnection.icegatheringstatechange.

third_party/WebKit/Source/modules/peerconnection/RTCPeerConnection.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 1377 matching lines @@
 void RTCPeerConnection::changeSignalingState(SignalingState signalingState) {
   if (m_signalingState != SignalingStateClosed &&
       m_signalingState != signalingState) {
     m_signalingState = signalingState;
     scheduleDispatchEvent(Event::create(EventTypeNames::signalingstatechange));
   }
 }
 
 void RTCPeerConnection::changeIceGatheringState(
     ICEGatheringState iceGatheringState) {
-  m_iceGatheringState = iceGatheringState;
+  if (m_iceConnectionState != ICEConnectionStateClosed &&
+      m_iceGatheringState != iceGatheringState) {
+    m_iceGatheringState = iceGatheringState;
+    scheduleDispatchEvent(
+        Event::create(EventTypeNames::icegatheringstatechange));
+  }
 }
 
 bool RTCPeerConnection::setIceConnectionState(
     ICEConnectionState iceConnectionState) {
   if (m_iceConnectionState != ICEConnectionStateClosed &&
       m_iceConnectionState != iceConnectionState) {
     m_iceConnectionState = iceConnectionState;
     if (m_iceConnectionState == ICEConnectionStateConnected)
       recordRapporMetrics();
 
@@ skipping 11 matching lines @@
                   wrapPersistent(this), iceConnectionState));
   }
 }
 
 void RTCPeerConnection::closeInternal() {
   DCHECK(m_signalingState != RTCPeerConnection::SignalingStateClosed);
   m_peerHandler->stop();
   m_closed = true;
 
   changeIceConnectionState(ICEConnectionStateClosed);
-  changeIceGatheringState(ICEGatheringStateComplete);
   changeSignalingState(SignalingStateClosed);
   Document* document = toDocument(getExecutionContext());
   HostsUsingFeatures::countAnyWorld(
       *document, HostsUsingFeatures::Feature::RTCPeerConnectionUsed);
 
   m_connectionHandleForScheduler.reset();
 }
 
 void RTCPeerConnection::scheduleDispatchEvent(Event* event) {
   scheduleDispatchEvent(event, nullptr);
@@ skipping 53 matching lines @@
 DEFINE_TRACE(RTCPeerConnection) {
   visitor->trace(m_localStreams);
   visitor->trace(m_remoteStreams);
   visitor->trace(m_dispatchScheduledEventRunner);
   visitor->trace(m_scheduledEvents);
   EventTargetWithInlineData::trace(visitor);
   SuspendableObject::trace(visitor);
 }
 
 }  // namespace blink