Adding stats that can be used to compute output audio levels.

webrtc/pc/rtcstatscollector_unittest.cc

Index: webrtc/pc/rtcstatscollector_unittest.cc
diff --git a/webrtc/pc/rtcstatscollector_unittest.cc b/webrtc/pc/rtcstatscollector_unittest.cc
index 7b7863212658fbd442e70b8ac5c7116b6db374a3..2668f16153e6253bc66a9d8dfaf665fcbc18ae0f 100644
--- a/webrtc/pc/rtcstatscollector_unittest.cc
+++ b/webrtc/pc/rtcstatscollector_unittest.cc
@@ -1521,6 +1521,8 @@ TEST_F(RTCStatsCollectorTest,
   voice_sender_info_ssrc1.local_stats.push_back(cricket::SsrcSenderInfo());
   voice_sender_info_ssrc1.local_stats[0].ssrc = 1;
   voice_sender_info_ssrc1.audio_level = 32767;
+  voice_sender_info_ssrc1.total_input_energy = 0.25;
+  voice_sender_info_ssrc1.total_input_duration = 0.5;
   voice_sender_info_ssrc1.echo_return_loss = 42;
   voice_sender_info_ssrc1.echo_return_loss_enhancement = 52;
 
@@ -1530,6 +1532,8 @@ TEST_F(RTCStatsCollectorTest,
   voice_sender_info_ssrc2.local_stats.push_back(cricket::SsrcSenderInfo());
   voice_sender_info_ssrc2.local_stats[0].ssrc = 2;
   voice_sender_info_ssrc2.audio_level = 0;
+  voice_sender_info_ssrc2.total_input_energy = 0.0;
+  voice_sender_info_ssrc2.total_input_duration = 0.0;
   voice_sender_info_ssrc2.echo_return_loss = -100;
   voice_sender_info_ssrc2.echo_return_loss_enhancement = -100;
 
@@ -1544,6 +1548,8 @@ TEST_F(RTCStatsCollectorTest,
   voice_receiver_info.local_stats.push_back(cricket::SsrcReceiverInfo());
   voice_receiver_info.local_stats[0].ssrc = 3;
   voice_receiver_info.audio_level = 16383;
+  voice_receiver_info.total_output_energy = 0.125;
+  voice_receiver_info.total_output_duration = 0.25;
 
   test_->CreateMockRtpSendersReceiversAndChannels(
       { std::make_pair(local_audio_track.get(), voice_sender_info_ssrc1),
@@ -1582,6 +1588,8 @@ TEST_F(RTCStatsCollectorTest,
   expected_local_audio_track_ssrc1.ended = true;
   expected_local_audio_track_ssrc1.detached = false;
   expected_local_audio_track_ssrc1.audio_level = 1.0;
+  expected_local_audio_track_ssrc1.total_audio_energy = 0.25;
+  expected_local_audio_track_ssrc1.total_samples_duration = 0.5;
   expected_local_audio_track_ssrc1.echo_return_loss = 42.0;
   expected_local_audio_track_ssrc1.echo_return_loss_enhancement = 52.0;
   ASSERT_TRUE(report->Get(expected_local_audio_track_ssrc1.id()));
@@ -1597,6 +1605,8 @@ TEST_F(RTCStatsCollectorTest,
   expected_local_audio_track_ssrc2.ended = true;
   expected_local_audio_track_ssrc2.detached = false;
   expected_local_audio_track_ssrc2.audio_level = 0.0;
+  expected_local_audio_track_ssrc2.total_audio_energy = 0.0;
+  expected_local_audio_track_ssrc2.total_samples_duration = 0.0;
   // Should be undefined: |expected_local_audio_track_ssrc2.echo_return_loss|
   // and |expected_local_audio_track_ssrc2.echo_return_loss_enhancement|.
   ASSERT_TRUE(report->Get(expected_local_audio_track_ssrc2.id()));
@@ -1612,6 +1622,8 @@ TEST_F(RTCStatsCollectorTest,
   expected_remote_audio_track.ended = false;
   expected_remote_audio_track.detached = false;
   expected_remote_audio_track.audio_level = 16383.0 / 32767.0;
+  expected_remote_audio_track.total_audio_energy = 0.125;
+  expected_remote_audio_track.total_samples_duration = 0.25;
   ASSERT_TRUE(report->Get(expected_remote_audio_track.id()));
   EXPECT_EQ(expected_remote_audio_track,
             report->Get(expected_remote_audio_track.id())->cast_to<