Remove libvpx from FFmpeg in favour of ffvp8.

ffmpeg/source/avcodec-53.sigs

Index: ffmpeg/source/avcodec-53.sigs
diff --git a/ffmpeg/source/avcodec-53.sigs b/ffmpeg/source/avcodec-53.sigs
index 3b28ac370d76a6b25389364889d7a3de0a56d48a..e13849fc2889ec4b50b75da1ab5044187398b59c 100644
--- a/ffmpeg/source/avcodec-53.sigs
+++ b/ffmpeg/source/avcodec-53.sigs
@@ -1,4 +1,4 @@
-# Copyright (c) 2010 The Chromium Authors. All rights reserved.
+# Copyright (c) 2011 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 #
@@ -30,22 +30,3 @@ int av_lockmgr_register(AVLockMgrOperation cb);
 RDFTContext *av_rdft_init(int nbits, enum RDFTransformType trans);
 void av_rdft_calc(RDFTContext *s, FFTSample *data);
 void av_rdft_end(RDFTContext *s);
-
-# Export symbols for libvpx since Chromium is also using libvpx directly.
-vpx_codec_err_t vpx_codec_enc_config_default(vpx_codec_iface_t *iface, vpx_codec_enc_cfg_t *cfg, unsigned int usage);
-vpx_codec_err_t vpx_codec_enc_init_ver(vpx_codec_ctx_t *ctx, vpx_codec_iface_t *iface, vpx_codec_enc_cfg_t *cfg, vpx_codec_flags_t flags, int ver);
-vpx_codec_err_t vpx_codec_encode(vpx_codec_ctx_t *ctx, const vpx_image_t *img, vpx_codec_pts_t pts, unsigned long duration, vpx_enc_frame_flags_t flags, unsigned long deadline);
-const char *vpx_codec_error_detail(vpx_codec_ctx_t *ctx);
-const char *vpx_codec_error(vpx_codec_ctx_t *ctx);
-const char *vpx_codec_err_to_string(vpx_codec_err_t err);
-const vpx_codec_cx_pkt_t *vpx_codec_get_cx_data(vpx_codec_ctx_t *ctx, vpx_codec_iter_t *iter);
-vpx_codec_err_t vpx_codec_destroy(vpx_codec_ctx_t *ctx);
-vpx_codec_err_t vpx_codec_control_(vpx_codec_ctx_t *ctx, int ctrl_id, ...);
-vpx_codec_err_t vpx_codec_dec_init_ver(vpx_codec_ctx_t *ctx, vpx_codec_iface_t *iface, vpx_codec_dec_cfg_t *cfg, vpx_codec_flags_t flags, int ver);
-vpx_codec_err_t vpx_codec_decode(vpx_codec_ctx_t *ctx, const uint8_t *data, unsigned int data_sz, void *user_priv, long deadline);
-vpx_image_t *vpx_codec_get_frame(vpx_codec_ctx_t *ctx, vpx_codec_iter_t *iter);
-vpx_codec_iface_t* vpx_codec_vp8_cx(void);
-vpx_codec_iface_t* vpx_codec_vp8_dx(void);
-vpx_image_t *vpx_img_alloc(vpx_image_t *img, vpx_img_fmt_t fmt, unsigned int d_w,unsigned int d_h, unsigned int align);
-void vpx_img_free(vpx_image_t *img);
-vpx_codec_err_t vpx_codec_enc_config_set(vpx_codec_ctx_t *ctx, const vpx_codec_enc_cfg_t *cfg);