Enable cpplint and fix cpplint errors in webrtc/*audio

webrtc/common_audio/real_fourier.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 17 matching lines @@
   typedef std::unique_ptr<float[], AlignedFreeDeleter> fft_real_scoper;
   typedef std::unique_ptr<std::complex<float>[], AlignedFreeDeleter>
       fft_cplx_scoper;
 
   // The alignment required for all input and output buffers, in bytes.
   static const size_t kFftBufferAlignment;
 
   // Construct a wrapper instance for the given input order, which must be
   // between 1 and kMaxFftOrder, inclusively.
   static std::unique_ptr<RealFourier> Create(int fft_order);
-  virtual ~RealFourier() {};
+  virtual ~RealFourier() {}
 
   // Helper to compute the smallest FFT order (a power of 2) which will contain
   // the given input length.
   static int FftOrder(size_t length);
 
   // Helper to compute the input length from the FFT order.
   static size_t FftLength(int order);
 
   // Helper to compute the exact length, in complex floats, of the transform
   // output (i.e. |2^order / 2 + 1|).
@@ skipping 17 matching lines @@
   // not needed.
   virtual void Inverse(const std::complex<float>* src, float* dest) const = 0;
 
   virtual int order() const = 0;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_COMMON_AUDIO_REAL_FOURIER_H_