Add libvpx wrapper to media to support VP9 video decoding.

webkit/media/filter_helpers.cc

Index: webkit/media/filter_helpers.cc
diff --git a/webkit/media/filter_helpers.cc b/webkit/media/filter_helpers.cc
index 23774c3b0152c71b8ac45f453eb0ac4681149534..ec34ace1705948a51f7b5f01cb10e86de74c0f54 100644
--- a/webkit/media/filter_helpers.cc
+++ b/webkit/media/filter_helpers.cc
@@ -16,6 +16,7 @@
 #include "media/filters/ffmpeg_demuxer.h"
 #include "media/filters/ffmpeg_video_decoder.h"
 #include "media/filters/opus_audio_decoder.h"
+#include "media/filters/vpx_video_decoder.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebURL.h"
 #include "webkit/media/crypto/proxy_decryptor.h"
 #include "webkit/media/media_stream_client.h"
@@ -39,6 +40,10 @@ static void AddDefaultDecodersToCollection(
     scoped_refptr<media::OpusAudioDecoder> opus_audio_decoder =
         new media::OpusAudioDecoder(message_loop);
     filter_collection->GetAudioDecoders()->push_back(opus_audio_decoder);
+
+    scoped_refptr<media::VpxVideoDecoder> vpx_video_decoder =
+        new media::VpxVideoDecoder(message_loop);
+    filter_collection->GetVideoDecoders()->push_back(vpx_video_decoder);
   }
 
   scoped_refptr<media::FFmpegAudioDecoder> ffmpeg_audio_decoder =