Add QuicStringPiece which is actually StringPiece.

net/quic/core/crypto/aead_base_encrypter.h

 // Copyright (c) 2013 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_CORE_CRYPTO_AEAD_BASE_ENCRYPTER_H_
 #define NET_QUIC_CORE_CRYPTO_AEAD_BASE_ENCRYPTER_H_
 
 #include <cstddef>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "net/quic/core/crypto/quic_encrypter.h"
 #include "net/quic/core/crypto/scoped_evp_aead_ctx.h"
 #include "net/quic/platform/api/quic_export.h"
+#include "net/quic/platform/api/quic_string_piece.h"
 
 namespace net {
 
 // AeadBaseEncrypter is the base class of AEAD QuicEncrypter subclasses.
 class QUIC_EXPORT_PRIVATE AeadBaseEncrypter : public QuicEncrypter {
  public:
   AeadBaseEncrypter(const EVP_AEAD* aead_alg,
                     size_t key_size,
                     size_t auth_tag_size,
                     size_t nonce_prefix_size);
   ~AeadBaseEncrypter() override;
 
   // QuicEncrypter implementation
-  bool SetKey(base::StringPiece key) override;
-  bool SetNoncePrefix(base::StringPiece nonce_prefix) override;
+  bool SetKey(QuicStringPiece key) override;
+  bool SetNoncePrefix(QuicStringPiece nonce_prefix) override;
   bool EncryptPacket(QuicVersion version,
                      QuicPacketNumber packet_number,
-                     base::StringPiece associated_data,
-                     base::StringPiece plaintext,
+                     QuicStringPiece associated_data,
+                     QuicStringPiece plaintext,
                      char* output,
                      size_t* output_length,
                      size_t max_output_length) override;
   size_t GetKeySize() const override;
   size_t GetNoncePrefixSize() const override;
   size_t GetMaxPlaintextSize(size_t ciphertext_size) const override;
   size_t GetCiphertextSize(size_t plaintext_size) const override;
-  base::StringPiece GetKey() const override;
-  base::StringPiece GetNoncePrefix() const override;
+  QuicStringPiece GetKey() const override;
+  QuicStringPiece GetNoncePrefix() const override;
 
   // Necessary so unit tests can explicitly specify a nonce, instead of a
   // nonce prefix and packet number.
-  bool Encrypt(base::StringPiece nonce,
-               base::StringPiece associated_data,
-               base::StringPiece plaintext,
+  bool Encrypt(QuicStringPiece nonce,
+               QuicStringPiece associated_data,
+               QuicStringPiece plaintext,
                unsigned char* output);
 
  protected:
   // Make these constants available to the subclasses so that the subclasses
   // can assert at compile time their key_size_ and nonce_prefix_size_ do not
   // exceed the maximum.
   static const size_t kMaxKeySize = 32;
   static const size_t kMaxNoncePrefixSize = 4;
 
  private:
   const EVP_AEAD* const aead_alg_;
   const size_t key_size_;
   const size_t auth_tag_size_;
   const size_t nonce_prefix_size_;
 
   // The key.
   unsigned char key_[kMaxKeySize];
   // The nonce prefix.
   unsigned char nonce_prefix_[kMaxNoncePrefixSize];
 
   ScopedEVPAEADCtx ctx_;
 
   DISALLOW_COPY_AND_ASSIGN(AeadBaseEncrypter);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CORE_CRYPTO_AEAD_BASE_ENCRYPTER_H_