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

webrtc/modules/audio_device/android/audio_common.h

 /*
  *  Copyright (c) 2013 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.
  */
 
 #ifndef WEBRTC_MODULES_AUDIO_DEVICE_ANDROID_AUDIO_COMMON_H_
 #define WEBRTC_MODULES_AUDIO_DEVICE_ANDROID_AUDIO_COMMON_H_
 
 namespace webrtc {
 
-enum {
-  kDefaultSampleRate = 44100,
-  kNumChannels = 1,
-  // Number of bytes per audio frame.
-  // Example: 16-bit PCM in mono => 1*(16/8)=2 [bytes/frame]
-  kBytesPerFrame = kNumChannels * (16 / 8),
-  // Delay estimates for the two different supported modes. These values
-  // are based on real-time round-trip delay estimates on a large set of
-  // devices and they are lower bounds since the filter length is 128 ms,
-  // so the AEC works for delays in the range [50, ~170] ms and [150, ~270] ms.
-  // Note that, in most cases, the lowest delay estimate will not be utilized
-  // since devices that support low-latency output audio often supports
-  // HW AEC as well.
-  kLowLatencyModeDelayEstimateInMilliseconds = 50,
-  kHighLatencyModeDelayEstimateInMilliseconds = 150,
-};
+const int kDefaultSampleRate = 44100;
+const int kNumChannels = 1;
+// Number of bytes per audio frame.
+// Example: 16-bit PCM in mono => 1*(16/8)=2 [bytes/frame]
+const size_t kBytesPerFrame = kNumChannels * (16 / 8);
+// Delay estimates for the two different supported modes. These values are based
+// on real-time round-trip delay estimates on a large set of devices and they
+// are lower bounds since the filter length is 128 ms, so the AEC works for
+// delays in the range [50, ~170] ms and [150, ~270] ms. Note that, in most
+// cases, the lowest delay estimate will not be utilized since devices that
+// support low-latency output audio often supports HW AEC as well.
+const int kLowLatencyModeDelayEstimateInMilliseconds = 50;
+const int kHighLatencyModeDelayEstimateInMilliseconds = 150;
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_DEVICE_ANDROID_AUDIO_COMMON_H_