Start ICE connectivity checks as soon as the first pair is pingable.

webrtc/p2p/base/transport_unittest.cc

 /*
  *  Copyright 2011 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 221 matching lines @@
   ASSERT_EQ(1U, stats.channel_stats.size());
   EXPECT_EQ(1, stats.channel_stats[0].component);
   // Set local transport description for FakeTransport before connecting.
   TransportDescription faketransport_desc(
       std::vector<std::string>(),
       rtc::CreateRandomString(cricket::ICE_UFRAG_LENGTH),
       rtc::CreateRandomString(cricket::ICE_PWD_LENGTH), cricket::ICEMODE_FULL,
       cricket::CONNECTIONROLE_NONE, nullptr);
   transport_->SetLocalTransportDescription(faketransport_desc,
                                            cricket::CA_OFFER, nullptr);
-  transport_->ConnectChannels();
   EXPECT_TRUE(transport_->GetStats(&stats));
   ASSERT_EQ(1U, stats.channel_stats.size());
   EXPECT_EQ(1, stats.channel_stats[0].component);
 }
 
 // Tests that VerifyCertificateFingerprint only returns true when the
 // certificate matches the fingerprint.
 TEST_F(TransportTest, TestVerifyCertificateFingerprint) {
   std::string error_desc;
   EXPECT_FALSE(
@@ skipping 162 matching lines @@
     remote_desc.connection_role = param.remote_role;
 
     ASSERT_TRUE(transport_->SetRemoteTransportDescription(
         remote_desc, param.remote_action, nullptr));
     ASSERT_TRUE(transport_->SetLocalTransportDescription(
         local_desc, param.local_action, nullptr));
     EXPECT_FALSE(
         transport_->NegotiateRole(param.local_action, &ssl_role, &error_desc));
   }
 }