Fix typo'd usage of OS_MAC vs OS_MACOSX!

media/base/media_switches.cc

 // Copyright (c) 2012 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/media_switches.h"
 
 namespace switches {
 
 // Allow users to specify a custom buffer size for debugging purpose.
 const char kAudioBufferSize[] = "audio-buffer-size";
@@ skipping 24 matching lines @@
 const char kEnableExclusiveAudio[] = "enable-exclusive-audio";
 #endif
 
 // Disable automatic fallback from low latency to high latency path.
 const char kDisableAudioFallback[] = "disable-audio-fallback";
 
 // Disable AudioOutputResampler for automatic audio resampling and rebuffering.
 const char kDisableAudioOutputResampler[] = "disable-audio-output-resampler";
 
 // Controls renderer side mixing and low latency audio path for media elements.
-#if defined(OS_WIN) || defined(OS_MAC)
+#if defined(OS_WIN) || defined(OS_MACOSX)
 const char kDisableRendererSideMixing[] = "disable-renderer-side-mixing";
 #else
 const char kEnableRendererSideMixing[] = "enable-renderer-side-mixing";
 #endif
 
 // Enable browser-side audio mixer.
 const char kEnableAudioMixer[] = "enable-audio-mixer";
 
 // Enable live audio input with getUserMedia() and the Web Audio API.
 const char kEnableWebAudioInput[] = "enable-webaudio-input";
 
 // Set number of threads to use for video decoding.
 const char kVideoThreads[] = "video-threads";
 
 // Enables support for encrypted media. Current implementation is
 // incomplete and this flag is used for development and testing.
 const char kEnableEncryptedMedia[] = "enable-encrypted-media";
 
 }  // namespace switches