[Remoting Host] Supporting WebRTC VP9 streaming

remoting/protocol/webrtc_transport.cc

Index: remoting/protocol/webrtc_transport.cc
diff --git a/remoting/protocol/webrtc_transport.cc b/remoting/protocol/webrtc_transport.cc
index 693521c382bfca0ed2257de473743103d62eaaa0..fbacd2c418048397a49b83abb67c1c7f25da40c2 100644
--- a/remoting/protocol/webrtc_transport.cc
+++ b/remoting/protocol/webrtc_transport.cc
@@ -71,13 +71,17 @@ void UpdateCodecParameters(SdpMessage* sdp_message, bool incoming) {
   // TODO(isheriff): The need for this should go away once we have a proper
   // API to provide max bitrate for the case of handing over encoded
   // frames to webrtc.
-  if (sdp_message->has_video() &&
-      !sdp_message->AddCodecParameter(
-          "VP8", "x-google-min-bitrate=1000; x-google-max-bitrate=100000")) {
-    if (incoming) {
-      LOG(WARNING) << "VP8 not found in an incoming SDP.";
-    } else {
-      LOG(FATAL) << "VP8 not found in SDP generated by WebRTC.";
+  if (sdp_message->has_video()) {
+    bool param_added = sdp_message->AddCodecParameter(
+        "VP8", "x-google-min-bitrate=1000; x-google-max-bitrate=100000");
+    param_added |= sdp_message->AddCodecParameter(
+        "VP9", "x-google-min-bitrate=1000; x-google-max-bitrate=100000");
+    if (!param_added) {
+      if (incoming) {
+        LOG(WARNING) << "Neither of VP8/VP9 is found in an incoming SDP.";
+      } else {
+        LOG(FATAL) << "Neither of VP8/VP9 is found in SDP generated by WebRTC.";
+      }
     }
   }