RTCStatsCollector: Utilize network thread to minimize thread hops.

webrtc/api/webrtcsession_unittest.cc

 /*
  *  Copyright 2012 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 3021 matching lines @@
 
   EXPECT_EQ(session_->voice_rtp_transport_channel(),
             session_->video_rtp_transport_channel());
 
   cricket::BaseChannel* voice_channel = session_->voice_channel();
   ASSERT(voice_channel != NULL);
 
   // Checks if one of the transport channels contains a connection using a given
   // port.
   auto connection_with_remote_port = [this, voice_channel](int port) {
-    SessionStats stats;
-    session_->GetChannelTransportStats(voice_channel, &stats);
-    for (auto& kv : stats.transport_stats) {
+    std::unique_ptr<webrtc::SessionStats> stats = session_->GetStats();
+    for (auto& kv : stats->transport_stats) {
       for (auto& chan_stat : kv.second.channel_stats) {
         for (auto& conn_info : chan_stat.connection_infos) {
           if (conn_info.remote_candidate.address().port() == port) {
             return true;
           }
         }
       }
     }
     return false;
   };
@@ skipping 1307 matching lines @@
 }
 
 // TODO(bemasc): Add a TestIceStatesBundle with BUNDLE enabled.  That test
 // currently fails because upon disconnection and reconnection OnIceComplete is
 // called more than once without returning to IceGatheringGathering.
 
 INSTANTIATE_TEST_CASE_P(WebRtcSessionTests,
                         WebRtcSessionTest,
                         testing::Values(ALREADY_GENERATED,
                                         DTLS_IDENTITY_STORE));