Enable VP9 support in WebRTC HW encoder and decoders

content/renderer/media/gpu/rtc_video_encoder.cc

Index: content/renderer/media/gpu/rtc_video_encoder.cc
diff --git a/content/renderer/media/gpu/rtc_video_encoder.cc b/content/renderer/media/gpu/rtc_video_encoder.cc
index 4c42938e2a4bef07048703ba1fb759c6d4448135..988185b489dcb5097fe334683473301432f41c1b 100644
--- a/content/renderer/media/gpu/rtc_video_encoder.cc
+++ b/content/renderer/media/gpu/rtc_video_encoder.cc
@@ -41,6 +41,8 @@ media::VideoCodecProfile WebRTCVideoCodecToVideoCodecProfile(
   switch (type) {
     case webrtc::kVideoCodecVP8:
       return media::VP8PROFILE_ANY;
+    case webrtc::kVideoCodecVP9:
+      return media::VP9PROFILE_MIN;
     case webrtc::kVideoCodecH264:
       // TODO(magjed): WebRTC is only using Baseline profile for now. Update
       // once http://crbug/webrtc/6337 is fixed.