Revert of Make OS audio buffer size limits visible.

media/base/mac/audio_latency_mac.cc

-// Copyright 2017 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "media/base/mac/audio_latency_mac.h"
-#include "media/base/limits.h"
-
-namespace media {
-
-int GetMinAudioBufferSizeMacOS(int min_buffer_size, int sample_rate) {
-  int buffer_size = min_buffer_size;
-  if (sample_rate > 48000) {
-    // The default buffer size is too small for higher sample rates and may lead
-    // to glitching.  Adjust upwards by multiples of the default size.
-    if (sample_rate <= 96000)
-      buffer_size = 2 * limits::kMinAudioBufferSize;
-    else if (sample_rate <= 192000)
-      buffer_size = 4 * limits::kMinAudioBufferSize;
-  }
-  return buffer_size;
-}
-
-}  // namespace media