Fix Chromium clang plugin warnings

webrtc/modules/audio_processing/three_band_filter_bank.cc

 /*
  *  Copyright (c) 2015 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 113 matching lines @@
   dct_modulation_.resize(kNumBands * kSparsity);
   for (size_t i = 0; i < dct_modulation_.size(); ++i) {
     dct_modulation_[i].resize(kNumBands);
     for (size_t j = 0; j < kNumBands; ++j) {
       dct_modulation_[i][j] =
           2.f * cos(2.f * M_PI * i * (2.f * j + 1.f) / dct_modulation_.size());
     }
   }
 }
 
+ThreeBandFilterBank::~ThreeBandFilterBank() = default;
+
 // The analysis can be separated in these steps:
 //   1. Serial to parallel downsampling by a factor of |kNumBands|.
 //   2. Filtering of |kSparsity| different delayed signals with polyphase
 //      decomposition of the low-pass prototype filter and upsampled by a factor
 //      of |kSparsity|.
 //   3. Modulating with cosines and accumulating to get the desired band.
 void ThreeBandFilterBank::Analysis(const float* in,
                                    size_t length,
                                    float* const* out) {
   RTC_CHECK_EQ(in_buffer_.size(), rtc::CheckedDivExact(length, kNumBands));
@@ skipping 61 matching lines @@
                                      float* out) {
   memset(out, 0, split_length * sizeof(*out));
   for (size_t i = 0; i < kNumBands; ++i) {
     for (size_t j = 0; j < split_length; ++j) {
       out[j] += dct_modulation_[offset][i] * in[i][j];
     }
   }
 }
 
 }  // namespace webrtc