Remove libvpx from FFmpeg in favour of ffvp8.

ffmpeg/source/config/ChromeOS/linux/arm-neon/config.h

Index: ffmpeg/source/config/ChromeOS/linux/arm-neon/config.h
diff --git a/ffmpeg/source/config/ChromeOS/linux/arm-neon/config.h b/ffmpeg/source/config/ChromeOS/linux/arm-neon/config.h
index e9fb889cabe170f2f5e8bd840e2671df1b0618c8..1f08a46aeaa6267bb3292c53e27bdcd27b032131 100644
--- a/ffmpeg/source/config/ChromeOS/linux/arm-neon/config.h
+++ b/ffmpeg/source/config/ChromeOS/linux/arm-neon/config.h
@@ -1,7 +1,7 @@
 /* Automatically generated by configure - do not modify! */
 #ifndef FFMPEG_CONFIG_H
 #define FFMPEG_CONFIG_H
-#define FFMPEG_CONFIGURATION "--disable-everything --enable-fft --enable-rdft --disable-network --disable-bzlib --disable-zlib --disable-swscale --disable-amd3dnow --disable-amd3dnowext --enable-shared --disable-libvpx --enable-decoder='theora,vorbis' --disable-encoder=libvpx --enable-decoder='pcm_u8,pcm_s16le,pcm_f32le' --enable-demuxer='ogg,matroska,wav' --enable-cross-compile --arch=arm --target-os=linux --enable-armv6 --enable-armv6t2 --enable-armvfp --enable-neon --cross-prefix=/usr/bin/armv7a-cros-linux-gnueabi- --extra-cflags='-march=armv7-a' --extra-cflags='-mtune=cortex-a8' --extra-cflags='-mfpu=neon' --extra-cflags='-mfloat-abi=softfp' --extra-cflags=-I../../../libvpx/include --extra-ldflags=-L../../../libvpx/lib/linux/arm-neon --enable-decoder='aac,h264,mp3' --enable-demuxer='mp3,mov' --enable-parser=mpegaudio --enable-bsf=h264_mp4toannexb --enable-decoder=mpeg4 --enable-demuxer=avi --enable-bsf=mpeg4video_es --enable-demuxer=amr --enable-decoder='amrnb,amrwb' --enable-decoder=vp8 --enable-parser=vp8 --enable-demuxer=flac --enable-decoder=flac"
+#define FFMPEG_CONFIGURATION "--disable-everything --enable-fft --enable-rdft --disable-network --disable-bzlib --disable-zlib --disable-swscale --disable-amd3dnow --disable-amd3dnowext --enable-shared --enable-decoder='theora,vorbis,vp8' --enable-decoder='pcm_u8,pcm_s16le,pcm_f32le' --enable-demuxer='ogg,matroska,wav' --enable-parser=vp8 --enable-cross-compile --arch=arm --target-os=linux --enable-armv6 --enable-armv6t2 --enable-armvfp --enable-neon --cross-prefix=/usr/bin/armv7a-cros-linux-gnueabi- --extra-cflags='-march=armv7-a' --extra-cflags='-mtune=cortex-a8' --extra-cflags='-mfpu=neon' --extra-cflags='-mfloat-abi=softfp' --enable-decoder='aac,h264,mp3' --enable-demuxer='mp3,mov' --enable-parser=mpegaudio --enable-bsf=h264_mp4toannexb --enable-decoder=mpeg4 --enable-demuxer=avi --enable-bsf=mpeg4video_es --enable-demuxer=amr --enable-decoder='amrnb,amrwb' --enable-demuxer=flac --enable-decoder=flac"
 #define FFMPEG_LICENSE "LGPL version 2.1 or later"
 #define FFMPEG_DATADIR "/usr/local/share/ffmpeg"
 #define CC_TYPE "gcc"
@@ -204,7 +204,7 @@
 #define CONFIG_LIBVO_AACENC 0
 #define CONFIG_LIBVO_AMRWBENC 0
 #define CONFIG_LIBVORBIS 0
-#define CONFIG_LIBVPX 1
+#define CONFIG_LIBVPX 0
 #define CONFIG_LIBX264 0
 #define CONFIG_LIBXAVS 0
 #define CONFIG_LIBXVID 0