Add VP9 decode support to the remoting client.

remoting/client/rectangle_update_decoder.cc

Index: remoting/client/rectangle_update_decoder.cc
diff --git a/remoting/client/rectangle_update_decoder.cc b/remoting/client/rectangle_update_decoder.cc
index 53541b78a5643e821e030fd3a3e50d338605db55..3482527e90435fee611247f191f1d07e0a5f70dd 100644
--- a/remoting/client/rectangle_update_decoder.cc
+++ b/remoting/client/rectangle_update_decoder.cc
@@ -102,6 +102,8 @@ void RectangleUpdateDecoder::Initialize(const SessionConfig& config) {
     decoder_.reset(new VideoDecoderVerbatim());
   } else if (codec == ChannelConfig::CODEC_VP8) {
     decoder_ = VideoDecoderVpx::CreateForVP8();
+  } else if (codec == ChannelConfig::CODEC_VP9) {
+    decoder_ = VideoDecoderVpx::CreateForVP9();
   } else {
     NOTREACHED() << "Invalid Encoding found: " << codec;
   }