Remove libvpx from FFmpeg in favour of ffvp8.

ffmpeg/source/config/Chrome/linux/ia32/config.asm

Index: ffmpeg/source/config/Chrome/linux/ia32/config.asm
diff --git a/ffmpeg/source/config/Chrome/linux/ia32/config.asm b/ffmpeg/source/config/Chrome/linux/ia32/config.asm
index 927ca28e006764af2ea9b91f28dc2cb1c3591cd9..d0db3ceacf7214a6e24c8e9f98a1c5fead0a39da 100644
--- a/ffmpeg/source/config/Chrome/linux/ia32/config.asm
+++ b/ffmpeg/source/config/Chrome/linux/ia32/config.asm
@@ -59,7 +59,6 @@
 %define CONFIG_BSFS
 %define CONFIG_DECODERS
 %define CONFIG_DEMUXERS
-%define CONFIG_ENCODERS
 %define CONFIG_PARSERS
 %define CONFIG_PROTOCOLS
 %define CONFIG_AVCODEC
@@ -73,7 +72,6 @@
 %define CONFIG_GOLOMB
 %define CONFIG_H264DSP
 %define CONFIG_H264PRED
-%define CONFIG_LIBVPX
 %define CONFIG_MDCT
 %define CONFIG_MPEGAUDIODSP
 %define CONFIG_PIC
@@ -86,15 +84,15 @@
 %define CONFIG_H264_DECODER
 %define CONFIG_THEORA_DECODER
 %define CONFIG_VP3_DECODER
+%define CONFIG_VP8_DECODER
 %define CONFIG_AAC_DECODER
 %define CONFIG_MP3_DECODER
 %define CONFIG_VORBIS_DECODER
 %define CONFIG_PCM_F32LE_DECODER
 %define CONFIG_PCM_S16LE_DECODER
 %define CONFIG_PCM_U8_DECODER
-%define CONFIG_LIBVPX_DECODER
-%define CONFIG_LIBVPX_ENCODER
 %define CONFIG_MPEGAUDIO_PARSER
+%define CONFIG_VP8_PARSER
 %define CONFIG_H264_MP4TOANNEXB_BSF
 %define CONFIG_MATROSKA_DEMUXER
 %define CONFIG_MOV_DEMUXER