Fix chromium-style errors in IntelligibilityEnhancer

webrtc/modules/audio_processing/intelligibility/intelligibility_utils.cc

 /*
  *  Copyright (c) 2014 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 38 matching lines @@
 
 template class PowerEstimator<float>;
 template class PowerEstimator<std::complex<float>>;
 
 GainApplier::GainApplier(size_t freqs, float relative_change_limit)
     : num_freqs_(freqs),
       relative_change_limit_(relative_change_limit),
       target_(freqs, 1.f),
       current_(freqs, 1.f) {}
 
+GainApplier::~GainApplier() {}
+
 void GainApplier::Apply(const std::complex<float>* in_block,
                         std::complex<float>* out_block) {
   for (size_t i = 0; i < num_freqs_; ++i) {
     current_[i] = UpdateFactor(target_[i], current_[i], relative_change_limit_);
     out_block[i] = sqrtf(fabsf(current_[i])) * in_block[i];
   }
 }
 
 }  // namespace intelligibility
 
 }  // namespace webrtc