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

webrtc/modules/audio_device/android/audio_common.h

Index: webrtc/modules/audio_device/android/audio_common.h
diff --git a/webrtc/modules/audio_device/android/audio_common.h b/webrtc/modules/audio_device/android/audio_common.h
index cb259830b99345940ab51eb1979a4d41efde1f06..4eecae4b70622f8979a8777fa8b16818a218dc0f 100644
--- a/webrtc/modules/audio_device/android/audio_common.h
+++ b/webrtc/modules/audio_device/android/audio_common.h
@@ -13,22 +13,19 @@
 
 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