Fix Chromium clang plugin warnings

webrtc/common_audio/blocker.h

 /*
  *  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 53 matching lines @@
 // copy of window and does not attempt to delete it.
 class Blocker {
  public:
   Blocker(size_t chunk_size,
           size_t block_size,
           size_t num_input_channels,
           size_t num_output_channels,
           const float* window,
           size_t shift_amount,
           BlockerCallback* callback);
+  ~Blocker();
 
   void ProcessChunk(const float* const* input,
                     size_t chunk_size,
                     size_t num_input_channels,
                     size_t num_output_channels,
                     float* const* output);
 
  private:
   const size_t chunk_size_;
   const size_t block_size_;
@@ skipping 31 matching lines @@
   // The amount of frames between the start of contiguous blocks. For example,
   // |shift_amount_| = |block_size_| / 2 for a Hann window.
   size_t shift_amount_;
 
   BlockerCallback* callback_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_INTERNAL_BEAMFORMER_BLOCKER_H_