Pull out the PostFilter to its own NonlinearBeamformer API

webrtc/modules/audio_processing/audio_processing_unittest.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 1266 matching lines @@
   const size_t kNumInputChannels = 2;
   const size_t kNumOutputChannels = 1;
   const size_t kNumChunks = 700;
   const float kScaleFactor = 0.25f;
   Config config;
   std::vector<webrtc::Point> geometry;
   geometry.push_back(webrtc::Point(0.f, 0.f, 0.f));
   geometry.push_back(webrtc::Point(0.05f, 0.f, 0.f));
   config.Set<Beamforming>(new Beamforming(true, geometry));
   testing::NiceMock<MockNonlinearBeamformer>* beamformer =
-      new testing::NiceMock<MockNonlinearBeamformer>(geometry);
+      new testing::NiceMock<MockNonlinearBeamformer>(geometry, 1u);
   std::unique_ptr<AudioProcessing> apm(
       AudioProcessing::Create(config, beamformer));
   EXPECT_EQ(kNoErr, apm->gain_control()->Enable(true));
   ChannelBuffer<float> src_buf(kSamplesPerChannel, kNumInputChannels);
   ChannelBuffer<float> dest_buf(kSamplesPerChannel, kNumOutputChannels);
   const size_t max_length = kSamplesPerChannel * std::max(kNumInputChannels,
                                                           kNumOutputChannels);
   std::unique_ptr<int16_t[]> int_data(new int16_t[max_length]);
   std::unique_ptr<float[]> float_data(new float[max_length]);
   std::string filename = ResourceFilePath("far", kSampleRateHz);
@@ skipping 1469 matching lines @@
                     std::tr1::make_tuple(16000, 32000, 48000, 32000, 25, 35),
                     std::tr1::make_tuple(16000, 32000, 32000, 32000, 25, 0),
                     std::tr1::make_tuple(16000, 32000, 16000, 32000, 25, 20),
                     std::tr1::make_tuple(16000, 16000, 48000, 16000, 35, 20),
                     std::tr1::make_tuple(16000, 16000, 32000, 16000, 35, 20),
                     std::tr1::make_tuple(16000, 16000, 16000, 16000, 0, 0)));
 #endif
 
 }  // namespace
 }  // namespace webrtc