Remove usage of VoEBase::AssociateSendChannel() from WVoMC.

webrtc/audio/audio_receive_stream_unittest.cc

Index: webrtc/audio/audio_receive_stream_unittest.cc
diff --git a/webrtc/audio/audio_receive_stream_unittest.cc b/webrtc/audio/audio_receive_stream_unittest.cc
index bde68ed3ae7edb79e3422f2f758350aebe44c638..0331d9b7f698c5f2a6cad3a3e70c3f6379993164 100644
--- a/webrtc/audio/audio_receive_stream_unittest.cc
+++ b/webrtc/audio/audio_receive_stream_unittest.cc
@@ -113,6 +113,7 @@ struct ConfigHelper {
           EXPECT_CALL(*channel_proxy_, SetRtcEventLog(testing::IsNull()))
               .Times(1)
               .After(expect_set);
+          EXPECT_CALL(*channel_proxy_, DisassociateSendChannel()).Times(1);
           return channel_proxy_;
         }));
     EXPECT_CALL(voice_engine_, StopPlayout(kChannelId)).WillOnce(Return(0));