Boilerplate code addition in order to be able to test upcoming AEC additions

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 25 matching lines @@
   bool is_enabled() const override;
   int stream_drift_samples() const override;
   SuppressionLevel suppression_level() const override;
   bool is_drift_compensation_enabled() const override;
 
   // ProcessingComponent implementation.
   int Initialize() override;
   void SetExtraOptions(const Config& config) override;
   bool is_delay_agnostic_enabled() const;
   bool is_extended_filter_enabled() const;
+  bool is_next_generation_aec_enabled() const;
 
   // Reads render side data that has been queued on the render call.
   // Called holding the capture lock.
   void ReadQueuedRenderData();
 
  private:
   // EchoCancellation implementation.
   int Enable(bool enable) override;
   int enable_drift_compensation(bool enable) override;
   void set_stream_drift_samples(int drift) override;
@@ skipping 29 matching lines @@
 
   bool drift_compensation_enabled_ GUARDED_BY(crit_capture_);
   bool metrics_enabled_ GUARDED_BY(crit_capture_);
   SuppressionLevel suppression_level_ GUARDED_BY(crit_capture_);
   int stream_drift_samples_ GUARDED_BY(crit_capture_);
   bool was_stream_drift_set_ GUARDED_BY(crit_capture_);
   bool stream_has_echo_ GUARDED_BY(crit_capture_);
   bool delay_logging_enabled_ GUARDED_BY(crit_capture_);
   bool extended_filter_enabled_ GUARDED_BY(crit_capture_);
   bool delay_agnostic_enabled_ GUARDED_BY(crit_capture_);
+  bool next_generation_aec_enabled_ GUARDED_BY(crit_capture_);
 
   size_t render_queue_element_max_size_ GUARDED_BY(crit_render_)
       GUARDED_BY(crit_capture_);
   std::vector<float> render_queue_buffer_ GUARDED_BY(crit_render_);
   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_