Add 4 VP9 profiles to the media::VideoCodecProfile enum.

media/formats/webm/webm_video_client.cc

Index: media/formats/webm/webm_video_client.cc
diff --git a/media/formats/webm/webm_video_client.cc b/media/formats/webm/webm_video_client.cc
index 9d0435f051dca2b1b80e8bca4f522a6ac450c03a..8f322cb93ea97731599d6abc7e6e9ed3c5bea06b 100644
--- a/media/formats/webm/webm_video_client.cc
+++ b/media/formats/webm/webm_video_client.cc
@@ -44,7 +44,8 @@ bool WebMVideoClient::InitializeConfig(
     profile = VP8PROFILE_ANY;
   } else if (codec_id == "V_VP9") {
     video_codec = kCodecVP9;
-    profile = VP9PROFILE_ANY;
+    // TODO(servolk): Find a way to read VP9 profile from WebM.
+    profile = VP9PROFILE_PROFILE3;
   } else {
     MEDIA_LOG(ERROR, media_log_) << "Unsupported video codec_id " << codec_id;
     return false;