Make GetConfig() part of the AudioProcessing interface

webrtc/modules/audio_processing/include/mock_audio_processing.h

 /*
  *  Copyright (c) 2013 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 188 matching lines @@
   virtual MockLevelEstimator* level_estimator() const {
     return level_estimator_.get();
   }
   virtual MockNoiseSuppression* noise_suppression() const {
     return noise_suppression_.get();
   }
   virtual MockVoiceDetection* voice_detection() const {
     return voice_detection_.get();
   }
 
+  MOCK_CONST_METHOD0(GetConfig, AudioProcessing::Config());
+
  private:
   std::unique_ptr<MockEchoCancellation> echo_cancellation_;
   std::unique_ptr<MockEchoControlMobile> echo_control_mobile_;
   std::unique_ptr<MockGainControl> gain_control_;
   std::unique_ptr<MockHighPassFilter> high_pass_filter_;
   std::unique_ptr<MockLevelEstimator> level_estimator_;
   std::unique_ptr<MockNoiseSuppression> noise_suppression_;
   std::unique_ptr<MockVoiceDetection> voice_detection_;
 };
 
 }  // namespace test
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_INCLUDE_MOCK_AUDIO_PROCESSING_H_