Add a placeholder stat for logging the estimated residual echo likelihood.

webrtc/api/statscollector_unittest.cc

 /*
  *  Copyright 2014 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 384 matching lines @@
             value_in_report);
   EXPECT_TRUE(GetValue(
       report, StatsReport::kStatsValueNameEchoReturnLoss, &value_in_report));
   EXPECT_EQ(rtc::ToString<int>(sinfo.echo_return_loss),
             value_in_report);
   EXPECT_TRUE(GetValue(
       report, StatsReport::kStatsValueNameEchoReturnLossEnhancement,
       &value_in_report));
   EXPECT_EQ(rtc::ToString<int>(sinfo.echo_return_loss_enhancement),
             value_in_report);
-  EXPECT_TRUE(GetValue(
-      report, StatsReport::kStatsValueNameAudioInputLevel, &value_in_report));
+  EXPECT_TRUE(GetValue(report,
+                       StatsReport::kStatsValueNameResidualEchoLikelihood,
+                       &value_in_report));
+  EXPECT_EQ(rtc::ToString<float>(sinfo.residual_echo_likelihood),
+            value_in_report);
+  EXPECT_TRUE(GetValue(report, StatsReport::kStatsValueNameAudioInputLevel,
+                       &value_in_report));
   EXPECT_EQ(rtc::ToString<int>(sinfo.audio_level), value_in_report);
   EXPECT_TRUE(GetValue(
       report, StatsReport::kStatsValueNameTypingNoiseState, &value_in_report));
   std::string typing_detected = sinfo.typing_noise_detected ? "true" : "false";
   EXPECT_EQ(typing_detected, value_in_report);
 }
 
 // Helper methods to avoid duplication of code.
 void InitVoiceSenderInfo(cricket::VoiceSenderInfo* voice_sender_info) {
   voice_sender_info->add_ssrc(kSsrcOfTrack);
@@ skipping 1468 matching lines @@
   cricket::VoiceSenderInfo new_voice_sender_info;
   InitVoiceSenderInfo(&new_voice_sender_info);
   cricket::VoiceMediaInfo new_stats_read;
   reports.clear();
   SetupAndVerifyAudioTrackStats(
       new_audio_track.get(), stream_.get(), &stats, &voice_channel, kVcName,
       media_channel, &new_voice_sender_info, NULL, &new_stats_read, &reports);
 }
 
 }  // namespace webrtc