Allow pass through buffer sizes on OSX.

media/base/audio_hardware_config_unittest.cc

 // Copyright (c) 2013 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 "build/build_config.h"
 #include "media/base/audio_hardware_config.h"
 #include "media/audio/audio_parameters.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace media {
@@ skipping 83 matching lines @@
                                kInputSampleRate,
                                16,
                                kOutputBufferSize);
   AudioParameters output_params(AudioParameters::AUDIO_PCM_LOW_LATENCY,
                                 kOutputChannelLayout,
                                 3200,
                                 16,
                                 32);
   AudioHardwareConfig fake_config(input_params, output_params);
 
-#if defined(OS_LINUX)
+#if defined(OS_LINUX) || defined(OS_MACOSX)
   EXPECT_EQ(64, fake_config.GetHighLatencyBufferSize());
 
   for (int i = 6400; i <= 204800; i *= 2) {
     fake_config.UpdateOutputConfig(
         AudioParameters(AudioParameters::AUDIO_PCM_LOW_LATENCY,
                         kOutputChannelLayout,
                         i,
                         16,
                         32));
     EXPECT_EQ(2 * (i / 100), fake_config.GetHighLatencyBufferSize());
   }
 #else
   // If high latency buffer sizes are not supported, the value should just pass
   // through the output buffer size.
   EXPECT_EQ(32, fake_config.GetHighLatencyBufferSize());
 #endif
 }
 
 }  // namespace content