Add libvpx wrapper to media to support VP9 video decoding.

media/base/video_decoder_config.h

Index: media/base/video_decoder_config.h
diff --git a/media/base/video_decoder_config.h b/media/base/video_decoder_config.h
index b5ac79210c6076f034f67b758824f633bb32a1e2..958192c06feccbd8b0fc66de783716d707a65c85 100644
--- a/media/base/video_decoder_config.h
+++ b/media/base/video_decoder_config.h
@@ -27,12 +27,13 @@ enum VideoCodec {
   kCodecMPEG4,
   kCodecTheora,
   kCodecVP8,
+  kCodecVP9,
   // DO NOT ADD RANDOM VIDEO CODECS!
   //
   // The only acceptable time to add a new codec is if there is production code
   // that uses said codec in the same CL.
 
-  kVideoCodecMax = kCodecVP8  // Must equal the last "real" codec above.
+  kVideoCodecMax = kCodecVP9  // Must equal the last "real" codec above.
 };
 
 // Video stream profile.  This *must* match PP_VideoDecoder_Profile.
@@ -58,7 +59,10 @@ enum VideoCodecProfile {
   VP8PROFILE_MIN = 11,
   VP8PROFILE_MAIN = VP8PROFILE_MIN,
   VP8PROFILE_MAX = VP8PROFILE_MAIN,
-  VIDEO_CODEC_PROFILE_MAX = VP8PROFILE_MAX,
+  VP9PROFILE_MIN = 12,
+  VP9PROFILE_MAIN = VP9PROFILE_MIN,
+  VP9PROFILE_MAX = VP9PROFILE_MAIN,
+  VIDEO_CODEC_PROFILE_MAX = VP9PROFILE_MAX,
 };
 
 class MEDIA_EXPORT VideoDecoderConfig {