Use ProcessReverseStream in VoiceEngines OutputMixer

webrtc/modules/audio_processing/include/audio_processing.h

Index: webrtc/modules/audio_processing/include/audio_processing.h
diff --git a/webrtc/modules/audio_processing/include/audio_processing.h b/webrtc/modules/audio_processing/include/audio_processing.h
index 95e56097da3df12139076f52e906fc23c87d3ec4..2890bd5dcd31dbcd59feb06b85f6a59c047b3855 100644
--- a/webrtc/modules/audio_processing/include/audio_processing.h
+++ b/webrtc/modules/audio_processing/include/audio_processing.h
@@ -296,10 +296,6 @@ class AudioProcessing {
   // ensures the options are applied immediately.
   virtual void SetExtraOptions(const Config& config) = 0;
 
-  // TODO(peah): Remove after voice engine no longer requires it to resample
-  // the reverse stream to the forward rate.
-  virtual int input_sample_rate_hz() const = 0;
-
   // TODO(ajm): Only intended for internal use. Make private and friend the
   // necessary classes?
   virtual int proc_sample_rate_hz() const = 0;
@@ -367,8 +363,7 @@ class AudioProcessing {
   // chances are you don't need to use it.
   //
   // The |sample_rate_hz_|, |num_channels_|, and |samples_per_channel_|
-  // members of |frame| must be valid. |sample_rate_hz_| must correspond to
-  // |input_sample_rate_hz()|
+  // members of |frame| must be valid.
   //
   // TODO(ajm): add const to input; requires an implementation fix.
   // DEPRECATED: Use |ProcessReverseStream| instead.

[the sun, 2016/03/10 12:49:22]

If this is deprecated, can we make it a thin wrapper around
ProcessReverseStream, which DCHECKs that the IE is disabled? Also - move the
commentary to ProcessReverseStream.

[aluebs-webrtc, 2016/03/10 16:33:17]

Actually, now that we are updating the VoE, we can remove this completely. I
will do this in a follow up CL.