Small fixes for WevRTC protocol in host

remoting/codec/webrtc_video_encoder_vpx.cc

Index: remoting/codec/webrtc_video_encoder_vpx.cc
diff --git a/remoting/codec/webrtc_video_encoder_vpx.cc b/remoting/codec/webrtc_video_encoder_vpx.cc
index 5307263f60cbd7915d1b23577a2ce597143f6d71..dfa6050d79c5d504868ccd350cc587fd4b8c73ab 100644
--- a/remoting/codec/webrtc_video_encoder_vpx.cc
+++ b/remoting/codec/webrtc_video_encoder_vpx.cc
@@ -300,6 +300,10 @@ std::unique_ptr<WebrtcVideoEncoder::EncodedFrame> WebrtcVideoEncoderVpx::Encode(
   // Update active map based on updated region.
   if (params.clear_active_map)
     ClearActiveMap();
+
+  if (params.key_frame)
+    updated_region.SetRect(webrtc::DesktopRect::MakeSize(frame.size()));
+
   SetActiveMapFromRegion(updated_region);
 
   // Apply active map to the encoder.