- Clean up unused voice engine DTMF code.

webrtc/voice_engine/transmit_mixer.cc

Index: webrtc/voice_engine/transmit_mixer.cc
diff --git a/webrtc/voice_engine/transmit_mixer.cc b/webrtc/voice_engine/transmit_mixer.cc
index d6a5213217e3bfe92b36a3ddbf6b4f524f6ac0f3..0240389be14f8df7132f1315087036baa199a49f 100644
--- a/webrtc/voice_engine/transmit_mixer.cc
+++ b/webrtc/voice_engine/transmit_mixer.cc
@@ -205,7 +205,6 @@ TransmitMixer::TransmitMixer(uint32_t instanceId) :
     external_postproc_ptr_(NULL),
     external_preproc_ptr_(NULL),
     _mute(false),
-    _remainingMuteMicTimeMs(0),
     stereo_codec_(false),
     swap_stereo_channels_(false)
 {
@@ -359,17 +358,6 @@ TransmitMixer::PrepareDemux(const void* audioSamples,
     TypingDetection(keyPressed);
 #endif
 
-    // --- Mute during DTMF tone if direct feedback is enabled
-    if (_remainingMuteMicTimeMs > 0)
-    {
-        AudioFrameOperations::Mute(_audioFrame);
-        _remainingMuteMicTimeMs -= 10;
-        if (_remainingMuteMicTimeMs < 0)
-        {
-            _remainingMuteMicTimeMs = 0;
-        }
-    }
-
     // --- Mute signal
     if (_mute)
     {
@@ -477,15 +465,6 @@ uint32_t TransmitMixer::CaptureLevel() const
     return _captureLevel;
 }
 
-void
-TransmitMixer::UpdateMuteMicrophoneTime(uint32_t lengthMs)
-{
-    WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, -1),
-               "TransmitMixer::UpdateMuteMicrophoneTime(lengthMs=%d)",
-               lengthMs);
-    _remainingMuteMicTimeMs = lengthMs;
-}
-
 int32_t
 TransmitMixer::StopSend()
 {