Move all the packet parsing logic into QuicDispatcher from the

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 03957a3384d8e7c3cb6926a4f237e1fcd46c1f3e..249ad17b93386dadc82d94f42531685df107b7d8 100644
--- a/net/quic/quic_connection.cc
+++ b/net/quic/quic_connection.cc
@@ -360,6 +360,11 @@ void QuicConnection::OnVersionNegotiationPacket(
 void QuicConnection::OnRevivedPacket() {
 }
 
+bool QuicConnection::OnUnauthenticatedPublicHeader(
+    const QuicPacketPublicHeader& header) {
+  return true;
+}
+
 bool QuicConnection::OnUnauthenticatedHeader(const QuicPacketHeader& header) {
   return true;
 }