Removing the use of the soon-to-be-removed echo_cancellation_impl

webrtc/modules/audio_processing/echo_cancellation_impl.h

 /*
  *  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 30 matching lines @@
   // ProcessingComponent implementation.
   int Initialize() override;
   void SetExtraOptions(const Config& config) override;
   bool is_delay_agnostic_enabled() const;
   bool is_extended_filter_enabled() const;
 
   // Reads render side data that has been queued on the render call.
   // Called holding the capture lock.
   void ReadQueuedRenderData();
 
+  // Returns the system delay of the first AEC component.
+  int GetSystemDelayInSamples() const;
+
  private:
   // EchoCancellation implementation.
   int Enable(bool enable) override;
   int enable_drift_compensation(bool enable) override;
   void set_stream_drift_samples(int drift) override;
   int set_suppression_level(SuppressionLevel level) override;
   int enable_metrics(bool enable) override;
   bool are_metrics_enabled() const override;
   bool stream_has_echo() const override;
   int GetMetrics(Metrics* metrics) override;
@@ skipping 38 matching lines @@
   std::vector<float> capture_queue_buffer_ GUARDED_BY(crit_capture_);
 
   // Lock protection not needed.
   rtc::scoped_ptr<SwapQueue<std::vector<float>, RenderQueueItemVerifier<float>>>
       render_signal_queue_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_ECHO_CANCELLATION_IMPL_H_