Update from https://crrev.com/316786

net/quic/crypto/chacha20_poly1305_decrypter_nss.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/quic/crypto/chacha20_poly1305_decrypter.h"
 
 #include <pk11pub.h>
 
 #include "base/logging.h"
 
@@ skipping 18 matching lines @@
   NOTIMPLEMENTED();
 }
 
 ChaCha20Poly1305Decrypter::~ChaCha20Poly1305Decrypter() {}
 
 // static
 bool ChaCha20Poly1305Decrypter::IsSupported() {
   return false;
 }
 
-void ChaCha20Poly1305Decrypter::FillAeadParams(StringPiece nonce,
-                                               StringPiece associated_data,
-                                               size_t auth_tag_size,
-                                               AeadParams* aead_params) const {
+void ChaCha20Poly1305Decrypter::FillAeadParams(
+    StringPiece nonce,
+    const StringPiece& associated_data,
+    size_t auth_tag_size,
+    AeadParams* aead_params) const {
   NOTIMPLEMENTED();
 }
 
 #else  // defined(USE_NSS)
 
 ChaCha20Poly1305Decrypter::ChaCha20Poly1305Decrypter()
     : AeadBaseDecrypter(CKM_NSS_CHACHA20_POLY1305, PK11_Decrypt, kKeySize,
                         kAuthTagSize, kNoncePrefixSize) {
   static_assert(kKeySize <= kMaxKeySize, "key size too big");
   static_assert(kNoncePrefixSize <= kMaxNoncePrefixSize,
                 "nonce prefix size too big");
 }
 
 ChaCha20Poly1305Decrypter::~ChaCha20Poly1305Decrypter() {}
 
 // static
 bool ChaCha20Poly1305Decrypter::IsSupported() {
   return true;
 }
 
-void ChaCha20Poly1305Decrypter::FillAeadParams(StringPiece nonce,
-                                               StringPiece associated_data,
-                                               size_t auth_tag_size,
-                                               AeadParams* aead_params) const {
+void ChaCha20Poly1305Decrypter::FillAeadParams(
+    StringPiece nonce,
+    const StringPiece& associated_data,
+    size_t auth_tag_size,
+    AeadParams* aead_params) const {
   aead_params->len = sizeof(aead_params->data.nss_aead_params);
   CK_NSS_AEAD_PARAMS* nss_aead_params = &aead_params->data.nss_aead_params;
   nss_aead_params->pIv =
       reinterpret_cast<CK_BYTE*>(const_cast<char*>(nonce.data()));
   nss_aead_params->ulIvLen = nonce.size();
   nss_aead_params->pAAD =
       reinterpret_cast<CK_BYTE*>(const_cast<char*>(associated_data.data()));
   nss_aead_params->ulAADLen = associated_data.size();
   nss_aead_params->ulTagLen = auth_tag_size;
 }
 
 #endif  // defined(USE_NSS)
 
 }  // namespace net