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

webrtc/common_audio/vad/vad_core.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 86 matching lines @@
  *      - frame_length  : Number of input samples
  *
  * Output:
  *      - inst          : Updated filter states etc.
  *
  * Return value         : VAD decision
  *                        0 - No active speech
  *                        1-6 - Active speech
  */
 int WebRtcVad_CalcVad48khz(VadInstT* inst, const int16_t* speech_frame,
-                           int frame_length);
+                           size_t frame_length);
 int WebRtcVad_CalcVad32khz(VadInstT* inst, const int16_t* speech_frame,
-                           int frame_length);
+                           size_t frame_length);
 int WebRtcVad_CalcVad16khz(VadInstT* inst, const int16_t* speech_frame,
-                           int frame_length);
+                           size_t frame_length);
 int WebRtcVad_CalcVad8khz(VadInstT* inst, const int16_t* speech_frame,
-                          int frame_length);
+                          size_t frame_length);
 
 #endif  // WEBRTC_COMMON_AUDIO_VAD_VAD_CORE_H_