Remove libvpx from FFmpeg in favour of ffvp8.

ffmpeg/source/config/Chromium/linux/x64/config.h

Index: ffmpeg/source/config/Chromium/linux/x64/config.h
diff --git a/ffmpeg/source/config/Chromium/linux/x64/config.h b/ffmpeg/source/config/Chromium/linux/x64/config.h
index c4f08c5d50920b966f611e610d3bd56e63056a91..1a122d29c76e6b5c5651c62ccc292e6d1b2df455 100644
--- a/ffmpeg/source/config/Chromium/linux/x64/config.h
+++ b/ffmpeg/source/config/Chromium/linux/x64/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 --enable-libvpx --enable-decoder='theora,vorbis,libvpx' --enable-encoder=libvpx --enable-decoder='pcm_u8,pcm_s16le,pcm_f32le' --enable-demuxer='ogg,matroska,wav' --extra-cflags=-I../../../libvpx/include --extra-ldflags=-L../../../libvpx/lib/linux/x64"
+#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"
 #define FFMPEG_LICENSE "LGPL version 2.1 or later"
 #define FFMPEG_DATADIR "/usr/local/share/ffmpeg"
 #define CC_TYPE "gcc"
@@ -150,13 +150,13 @@
 #define CONFIG_BSFS 0
 #define CONFIG_DECODERS 1
 #define CONFIG_DEMUXERS 1
-#define CONFIG_ENCODERS 1
+#define CONFIG_ENCODERS 0
 #define CONFIG_FILTERS 0
 #define CONFIG_HWACCELS 0
 #define CONFIG_INDEVS 0
 #define CONFIG_MUXERS 0
 #define CONFIG_OUTDEVS 0
-#define CONFIG_PARSERS 0
+#define CONFIG_PARSERS 1
 #define CONFIG_PROTOCOLS 1
 #define CONFIG_AANDCT 0
 #define CONFIG_AC3DSP 0
@@ -182,7 +182,7 @@
 #define CONFIG_GPL 0
 #define CONFIG_GRAY 0
 #define CONFIG_H264DSP 0
-#define CONFIG_H264PRED 0
+#define CONFIG_H264PRED 1
 #define CONFIG_HARDCODED_TABLES 0
 #define CONFIG_HUFFMAN 0
 #define CONFIG_LIBCELT 0
@@ -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
@@ -385,7 +385,7 @@
 #define CONFIG_VP6_DECODER 0
 #define CONFIG_VP6A_DECODER 0
 #define CONFIG_VP6F_DECODER 0
-#define CONFIG_VP8_DECODER 0
+#define CONFIG_VP8_DECODER 1
 #define CONFIG_VQA_DECODER 0
 #define CONFIG_WMV1_DECODER 0
 #define CONFIG_WMV2_DECODER 0
@@ -529,7 +529,7 @@
 #define CONFIG_LIBOPENJPEG_DECODER 0
 #define CONFIG_LIBSCHROEDINGER_DECODER 0
 #define CONFIG_LIBSPEEX_DECODER 0
-#define CONFIG_LIBVPX_DECODER 1
+#define CONFIG_LIBVPX_DECODER 0
 #define CONFIG_A64MULTI_ENCODER 0
 #define CONFIG_A64MULTI5_ENCODER 0
 #define CONFIG_ASV1_ENCODER 0
@@ -642,7 +642,7 @@
 #define CONFIG_LIBVO_AACENC_ENCODER 0
 #define CONFIG_LIBVO_AMRWBENC_ENCODER 0
 #define CONFIG_LIBVORBIS_ENCODER 0
-#define CONFIG_LIBVPX_ENCODER 1
+#define CONFIG_LIBVPX_ENCODER 0
 #define CONFIG_LIBX264_ENCODER 0
 #define CONFIG_LIBXAVS_ENCODER 0
 #define CONFIG_LIBXVID_ENCODER 0
@@ -679,7 +679,7 @@
 #define CONFIG_PNM_PARSER 0
 #define CONFIG_VC1_PARSER 0
 #define CONFIG_VP3_PARSER 0
-#define CONFIG_VP8_PARSER 0
+#define CONFIG_VP8_PARSER 1
 #define CONFIG_AAC_ADTSTOASC_BSF 0
 #define CONFIG_CHOMP_BSF 0
 #define CONFIG_DUMP_EXTRADATA_BSF 0