Add libvpx wrapper to media to support VP9 video decoding.

media/webm/webm_tracks_parser.cc

 // Copyright (c) 2012 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.
 
 #include "media/webm/webm_tracks_parser.h"
 
 #include "base/logging.h"
 #include "base/string_util.h"
 #include "media/base/buffers.h"
 #include "media/webm/webm_constants.h"
@@ skipping 121 matching lines @@
 bool WebMTracksParser::OnFloat(int id, double val) {
   return true;
 }
 
 bool WebMTracksParser::OnBinary(int id, const uint8* data, int size) {
   return true;
 }
 
 bool WebMTracksParser::OnString(int id, const std::string& str) {
   if (id == kWebMIdCodecID && str != "A_VORBIS" && str != "A_OPUS" &&
-      str != "V_VP8") {
+      str != "V_VP8" && str != "V_VP9") {
     MEDIA_LOG(log_cb_) << "Unexpected CodecID " << str;
     return false;
   }
 
   return true;
 }
 
 }  // namespace media