Update a ton of audio code to use size_t more correctly and in general reduce

webrtc/modules/audio_coding/neteq/dtmf_tone_generator.h

 /*
  *  Copyright (c) 2012 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 12 matching lines @@
  public:
   enum ReturnCodes {
     kNotInitialized = -1,
     kParameterError = -2,
   };
 
   DtmfToneGenerator();
   virtual ~DtmfToneGenerator() {}
   virtual int Init(int fs, int event, int attenuation);
   virtual void Reset();
-  virtual int Generate(int num_samples, AudioMultiVector* output);
+  virtual int Generate(size_t num_samples, AudioMultiVector* output);
   virtual bool initialized() const;
 
  private:
   static const int kCoeff1[4][16];  // 1st oscillator model coefficient table.
   static const int kCoeff2[4][16];  // 2nd oscillator model coefficient table.
   static const int kInitValue1[4][16];  // Initialization for 1st oscillator.
   static const int kInitValue2[4][16];  // Initialization for 2nd oscillator.
   static const int kAmplitude[37];  // Amplitude for 0 through -36 dBm0.
   static const int16_t kAmpMultiplier = 23171;  // 3 dB attenuation (in Q15).
 
   bool initialized_;            // True if generator is initialized properly.
   int coeff1_;                  // 1st oscillator coefficient for this event.
   int coeff2_;                  // 2nd oscillator coefficient for this event.
   int amplitude_;               // Amplitude for this event.
   int16_t sample_history1_[2];  // Last 2 samples for the 1st oscillator.
   int16_t sample_history2_[2];  // Last 2 samples for the 2nd oscillator.
 
   DISALLOW_COPY_AND_ASSIGN(DtmfToneGenerator);
 };
 
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_AUDIO_CODING_NETEQ_DTMF_TONE_GENERATOR_H_