message: Make tryParseShortHeaderPacket() private
  Summary: Make tryParseShortHeaderPacket() private
diff: @@ -104,12 +104,6 @@ class QuicReadCodec {
  const AckStates& ackStates,
  size_t dstConnIdSize = kDefaultConnectionIdSize);
  - CodecResult tryParseShortHeaderPacket(
  - Buf data,
  - const AckStates& ackStates,
  - size_t dstConnIdSize,
  - folly::io::Cursor& cursor);
  -
  /**
  * Tries to parse the packet and returns whether or not
  * it is a version negotiation packet.
  @@ -164,6 +158,11 @@ class QuicReadCodec {
  folly::Optional<TimePoint> getHandshakeDoneTime();
  private:
  + CodecResult tryParseShortHeaderPacket(
  + Buf data,
  + const AckStates& ackStates,
  + size_t dstConnIdSize,
  + folly::io::Cursor& cursor);
  CodecResult parseLongHeaderPacket(
  BufQueue& queue,
  const AckStates& ackStates);
  