Remove VisitorShim and move shim behavior into QuicConnection. No

net/quic/quic_connection.cc

Index: net/quic/quic_connection.cc
diff --git a/net/quic/quic_connection.cc b/net/quic/quic_connection.cc
index 7dda3c7b2c13f6bc192634ecf996a8511eb56da1..c96fb42e35ae04f687dda51e8b5badbab0137128 100644
--- a/net/quic/quic_connection.cc
+++ b/net/quic/quic_connection.cc
@@ -694,6 +694,7 @@ bool QuicConnection::OnStreamFrame(const QuicStreamFrame& frame) {
     return false;
   }
   visitor_->OnStreamFrame(frame);
+  visitor_->PostProcessAfterData();
   stats_.stream_bytes_received += frame.frame_length;
   should_last_packet_instigate_acks_ = true;
   return connected_;
@@ -882,6 +883,7 @@ bool QuicConnection::OnRstStreamFrame(const QuicRstStreamFrame& frame) {
            << " with error: "
            << QuicUtils::StreamErrorToString(frame.error_code);
   visitor_->OnRstStream(frame);
+  visitor_->PostProcessAfterData();
   should_last_packet_instigate_acks_ = true;
   return connected_;
 }
@@ -912,6 +914,7 @@ bool QuicConnection::OnGoAwayFrame(const QuicGoAwayFrame& frame) {
 
   goaway_received_ = true;
   visitor_->OnGoAway(frame);
+  visitor_->PostProcessAfterData();
   should_last_packet_instigate_acks_ = true;
   return connected_;
 }
@@ -925,6 +928,7 @@ bool QuicConnection::OnWindowUpdateFrame(const QuicWindowUpdateFrame& frame) {
            << "WINDOW_UPDATE_FRAME received for stream: " << frame.stream_id
            << " with byte offset: " << frame.byte_offset;
   visitor_->OnWindowUpdateFrame(frame);
+  visitor_->PostProcessAfterData();
   should_last_packet_instigate_acks_ = true;
   return connected_;
 }
@@ -937,6 +941,7 @@ bool QuicConnection::OnBlockedFrame(const QuicBlockedFrame& frame) {
   DVLOG(1) << ENDPOINT
            << "BLOCKED_FRAME received for stream: " << frame.stream_id;
   visitor_->OnBlockedFrame(frame);
+  visitor_->PostProcessAfterData();
   should_last_packet_instigate_acks_ = true;
   return connected_;
 }
@@ -1332,6 +1337,7 @@ void QuicConnection::OnCanWrite() {
   {  // Limit the scope of the bundler. ACK inclusion happens elsewhere.
     ScopedPacketBundler bundler(this, NO_ACK);
     visitor_->OnCanWrite();
+    visitor_->PostProcessAfterData();
   }
 
   // After the visitor writes, it may have caused the socket to become write