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

media/ffmpeg/ffmpeg_common.h

Index: media/ffmpeg/ffmpeg_common.h
diff --git a/media/ffmpeg/ffmpeg_common.h b/media/ffmpeg/ffmpeg_common.h
index 40a559db24d1d041f485d3350187ce5a9338b3fa..01393698af30c3ca01b2d5fb64f9842a8e6faf3c 100644
--- a/media/ffmpeg/ffmpeg_common.h
+++ b/media/ffmpeg/ffmpeg_common.h
@@ -104,10 +104,6 @@ VideoCodec CodecIDToVideoCodec(CodecID codec_id);
 // Converts an FFmpeg audio codec ID into its corresponding supported codec id.
 AudioCodec CodecIDToAudioCodec(CodecID codec_id);
 
-// Calculates the duration of one frame based on the frame rate specified by
-// |config|.
-base::TimeDelta GetFrameDuration(const VideoDecoderConfig& config);
-
 // Closes & destroys all AVStreams in the context and then closes &
 // destroys the AVFormatContext.
 void DestroyAVFormatContext(AVFormatContext* format_context);