Switch "const StringPiece&" to just "StringPiece" in QUIC code. No functional change. Not flag prot…

net/quic/crypto/chacha20_poly1305_decrypter.h

 // 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.
 
 #ifndef NET_QUIC_CRYPTO_CHACHA20_POLY1305_DECRYPTER_H_
 #define NET_QUIC_CRYPTO_CHACHA20_POLY1305_DECRYPTER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 16 matching lines @@
     kAuthTagSize = 12,
   };
 
   ChaCha20Poly1305Decrypter();
   ~ChaCha20Poly1305Decrypter() override;
 
 #if !defined(USE_OPENSSL)
  protected:
   // AeadBaseDecrypter methods:
   void FillAeadParams(base::StringPiece nonce,
-                      const base::StringPiece& associated_data,
+                      base::StringPiece associated_data,
                       size_t auth_tag_size,
                       AeadParams* aead_params) const override;
 #endif
 
   const char* cipher_name() const override;
   uint32_t cipher_id() const override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ChaCha20Poly1305Decrypter);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CRYPTO_CHACHA20_POLY1305_DECRYPTER_H_