Add QuicStringPiece which is actually StringPiece.

net/quic/core/crypto/crypto_utils.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.
 //
 // Some helpers for quic crypto
 
 #ifndef NET_QUIC_CORE_CRYPTO_CRYPTO_UTILS_H_
 #define NET_QUIC_CORE_CRYPTO_CRYPTO_UTILS_H_
 
 #include <cstddef>
 #include <cstdint>
 #include <string>
 
 #include "base/macros.h"
-#include "base/strings/string_piece.h"
 #include "net/quic/core/crypto/crypto_handshake.h"
 #include "net/quic/core/crypto/crypto_handshake_message.h"
 #include "net/quic/core/crypto/crypto_protocol.h"
 #include "net/quic/core/quic_packets.h"
 #include "net/quic/core/quic_time.h"
 #include "net/quic/platform/api/quic_export.h"
+#include "net/quic/platform/api/quic_string_piece.h"
 
 namespace net {
 
 class QuicRandom;
 
 class QUIC_EXPORT_PRIVATE CryptoUtils {
  public:
   // Diversification is a utility class that's used to act like a union type.
   // Values can be created by calling the functions like |NoDiversification|,
   // below.
@@ skipping 35 matching lines @@
     Mode mode_;
     DiversificationNonce* nonce_;
   };
 
   // Generates the connection nonce. The nonce is formed as:
   //   <4 bytes> current time
   //   <8 bytes> |orbit| (or random if |orbit| is empty)
   //   <20 bytes> random
   static void GenerateNonce(QuicWallTime now,
                             QuicRandom* random_generator,
-                            base::StringPiece orbit,
+                            QuicStringPiece orbit,
                             std::string* nonce);
 
   // DeriveKeys populates |crypters->encrypter|, |crypters->decrypter|, and
   // |subkey_secret| (optional -- may be null) given the contents of
   // |premaster_secret|, |client_nonce|, |server_nonce| and |hkdf_input|. |aead|
   // determines which cipher will be used. |perspective| controls whether the
   // server's keys are assigned to |encrypter| or |decrypter|. |server_nonce| is
   // optional and, if non-empty, is mixed into the key derivation.
   // |subkey_secret| will have the same length as |premaster_secret|.
   //
   // If the mode of |diversification| is NEVER, the the crypters will be
   // configured to never perform key diversification. If the mode is
   // NOW (which is only for servers, then the encrypter will be keyed via a
   // two-step process that uses the nonce from |diversification|.
   // If the mode is PENDING (which is only for servres), then the
   // decrypter will only be keyed to a preliminary state: a call to
   // |SetDiversificationNonce| with a diversification nonce will be needed to
   // complete keying.
-  static bool DeriveKeys(base::StringPiece premaster_secret,
+  static bool DeriveKeys(QuicStringPiece premaster_secret,
                          QuicTag aead,
-                         base::StringPiece client_nonce,
-                         base::StringPiece server_nonce,
+                         QuicStringPiece client_nonce,
+                         QuicStringPiece server_nonce,
                          const std::string& hkdf_input,
                          Perspective perspective,
                          Diversification diversification,
                          CrypterPair* crypters,
                          std::string* subkey_secret);
 
   // Performs key extraction to derive a new secret of |result_len| bytes
   // dependent on |subkey_secret|, |label|, and |context|. Returns false if the
   // parameters are invalid (e.g. |label| contains null bytes); returns true on
   // success.
-  static bool ExportKeyingMaterial(base::StringPiece subkey_secret,
-                                   base::StringPiece label,
-                                   base::StringPiece context,
+  static bool ExportKeyingMaterial(QuicStringPiece subkey_secret,
+                                   QuicStringPiece label,
+                                   QuicStringPiece context,
                                    size_t result_len,
                                    std::string* result);
 
   // Computes the FNV-1a hash of the provided DER-encoded cert for use in the
   // XLCT tag.
-  static uint64_t ComputeLeafCertHash(base::StringPiece cert);
+  static uint64_t ComputeLeafCertHash(QuicStringPiece cert);
 
   // Validates that |server_hello| is actually an SHLO message and that it is
   // not part of a downgrade attack.
   //
   // Returns QUIC_NO_ERROR if this is the case or returns the appropriate error
   // code and sets |error_details|.
   static QuicErrorCode ValidateServerHello(
       const CryptoHandshakeMessage& server_hello,
       const QuicVersionVector& negotiated_versions,
       std::string* error_details);
@@ skipping 18 matching lines @@
   static void HashHandshakeMessage(const CryptoHandshakeMessage& message,
                                    std::string* output);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(CryptoUtils);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CORE_CRYPTO_CRYPTO_UTILS_H_