Feed the WebRTC APM with empty far-end frames for the number of frames skipped by OS.

content/renderer/media/media_stream_audio_processor_unittest.cc

Index: content/renderer/media/media_stream_audio_processor_unittest.cc
diff --git a/content/renderer/media/media_stream_audio_processor_unittest.cc b/content/renderer/media/media_stream_audio_processor_unittest.cc
index e0492bbc849261f7b8b44e12e19dfe59644f4d1c..e418a2b71a8b09676e76e85db37aa0534140bfc3 100644
--- a/content/renderer/media/media_stream_audio_processor_unittest.cc
+++ b/content/renderer/media/media_stream_audio_processor_unittest.cc
@@ -131,7 +131,7 @@ class MediaStreamAudioProcessorTest : public ::testing::Test {
           }
         }
         audio_processor->OnPlayoutData(data_bus_playout_to_use,
-                                       params.sample_rate(), 10);
+                                       params.sample_rate(), 10, 0);
       }
 
       media::AudioBus* processed_data = nullptr;