Dead code elimination: scythe.chrome_functions:segment.path %media% edition, round 1.

media/base/channel_layout.h

Index: media/base/channel_layout.h
diff --git a/media/base/channel_layout.h b/media/base/channel_layout.h
index 6a7d1ad6f55037bd4432b127e0f539c05624244a..ac10661daf90ebb4d223a73ba1ff56d6169a5a6f 100644
--- a/media/base/channel_layout.h
+++ b/media/base/channel_layout.h
@@ -5,6 +5,7 @@
 #ifndef MEDIA_BASE_CHANNEL_LAYOUT_H_
 #define MEDIA_BASE_CHANNEL_LAYOUT_H_
 
+#include "build/build_config.h"
 #include "media/base/media_export.h"
 
 enum ChannelLayout {
@@ -77,6 +78,7 @@ enum Channels {
   CHANNELS_MAX
 };
 
+#if defined(OS_MACOSX) || defined(USE_PULSEAUDIO)
 // The channel orderings for each layout as specified by FFmpeg.
 // Values represent the index of each channel in each layout. For example, the
 // left side surround sound channel in FFmpeg's 5.1 layout is in the 5th
@@ -84,6 +86,7 @@ enum Channels {
 // kChannelOrderings[CHANNEL_LAYOUT_5POINT1][SIDE_LEFT] = 4;
 // Values of -1 mean the channel at that index is not used for that layout.
 extern const int kChannelOrderings[CHANNEL_LAYOUT_MAX][CHANNELS_MAX];
+#endif
 
 // Returns the number of channels in a given ChannelLayout.
 MEDIA_EXPORT int ChannelLayoutToChannelCount(ChannelLayout layout);