Add config continualGatheringPolicy to the IOS RTCConfiguration.

webrtc/sdk/objc/Framework/UnitTests/RTCConfigurationTest.mm

 /*
  *  Copyright 2015 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 23 matching lines @@
   config.iceTransportPolicy = RTCIceTransportPolicyRelay;
   config.bundlePolicy = RTCBundlePolicyMaxBundle;
   config.rtcpMuxPolicy = RTCRtcpMuxPolicyNegotiate;
   config.tcpCandidatePolicy = RTCTcpCandidatePolicyDisabled;
   const int maxPackets = 60;
   const int timeout = 1;
   const int interval = 2;
   config.audioJitterBufferMaxPackets = maxPackets;
   config.iceConnectionReceivingTimeout = timeout;
   config.iceBackupCandidatePairPingInterval = interval;
+  config.continualGatheringPolicy =
+      RTCContinualGatheringPolicyGatherContinually;
 
   webrtc::PeerConnectionInterface::RTCConfiguration nativeConfig =
       config.nativeConfiguration;
   EXPECT_EQ(1u, nativeConfig.servers.size());
   webrtc::PeerConnectionInterface::IceServer nativeServer =
       nativeConfig.servers.front();
   EXPECT_EQ(1u, nativeServer.urls.size());
   EXPECT_EQ("stun:stun1.example.net", nativeServer.urls.front());
 
   EXPECT_EQ(webrtc::PeerConnectionInterface::kRelay, nativeConfig.type);
   EXPECT_EQ(webrtc::PeerConnectionInterface::kBundlePolicyMaxBundle,
             nativeConfig.bundle_policy);
   EXPECT_EQ(webrtc::PeerConnectionInterface::kRtcpMuxPolicyNegotiate,
             nativeConfig.rtcp_mux_policy);
   EXPECT_EQ(webrtc::PeerConnectionInterface::kTcpCandidatePolicyDisabled,
             nativeConfig.tcp_candidate_policy);
   EXPECT_EQ(maxPackets, nativeConfig.audio_jitter_buffer_max_packets);
   EXPECT_EQ(timeout, nativeConfig.ice_connection_receiving_timeout);
   EXPECT_EQ(interval, nativeConfig.ice_backup_candidate_pair_ping_interval);
+  EXPECT_EQ(webrtc::PeerConnectionInterface::GATHER_CONTINUALLY,
+            nativeConfig.continual_gathering_policy);
 }
 
 @end
 
 TEST(RTCConfigurationTest, NativeConfigurationConversionTest) {
   @autoreleasepool {
     RTCConfigurationTest *test = [[RTCConfigurationTest alloc] init];
     [test testConversionToNativeConfiguration];
   }
 }