gfe-relnote: Enable initial obfuscators in QUIC_VERSION_99. Protected by quic_enable_version_99

PiperOrigin-RevId: 270834093
Change-Id: Ieee9980f6facc222ee700961a4a36791cf28ab39
diff --git a/quic/core/crypto/aead_base_decrypter.cc b/quic/core/crypto/aead_base_decrypter.cc
index 8fec273..b5db0db 100644
--- a/quic/core/crypto/aead_base_decrypter.cc
+++ b/quic/core/crypto/aead_base_decrypter.cc
@@ -186,6 +186,10 @@
   return key_size_;
 }
 
+size_t AeadBaseDecrypter::GetNoncePrefixSize() const {
+  return nonce_size_ - sizeof(QuicPacketNumber);
+}
+
 size_t AeadBaseDecrypter::GetIVSize() const {
   return nonce_size_;
 }