Add QuicStringPiece which is actually StringPiece.

net/quic/core/crypto/local_strike_register_client.h

 // Copyright 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_LOCAL_STRIKE_REGISTER_CLIENT_H_
 #define NET_QUIC_CORE_CRYPTO_LOCAL_STRIKE_REGISTER_CLIENT_H_
 
 #include <cstdint>
 
 #include "base/macros.h"
-#include "base/strings/string_piece.h"
 #include "net/quic/core/crypto/strike_register.h"
 #include "net/quic/core/crypto/strike_register_client.h"
 #include "net/quic/core/quic_time.h"
 #include "net/quic/platform/api/quic_export.h"
 #include "net/quic/platform/api/quic_mutex.h"
+#include "net/quic/platform/api/quic_string_piece.h"
 
 namespace net {
 
 // StrikeRegisterClient implementation that wraps a local in-memory
 // strike register.
 class QUIC_EXPORT_PRIVATE LocalStrikeRegisterClient
     : public StrikeRegisterClient {
  public:
   LocalStrikeRegisterClient(unsigned max_entries,
                             uint32_t current_time_external,
                             uint32_t window_secs,
                             const uint8_t orbit[8],
                             StrikeRegister::StartupType startup);
 
-  bool IsKnownOrbit(base::StringPiece orbit) const override;
-  void VerifyNonceIsValidAndUnique(base::StringPiece nonce,
+  bool IsKnownOrbit(QuicStringPiece orbit) const override;
+  void VerifyNonceIsValidAndUnique(QuicStringPiece nonce,
                                    QuicWallTime now,
                                    ResultCallback* cb) override;
 
  private:
   mutable QuicMutex m_;
   StrikeRegister strike_register_ GUARDED_BY(m_);
 
   DISALLOW_COPY_AND_ASSIGN(LocalStrikeRegisterClient);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CORE_CRYPTO_LOCAL_STRIKE_REGISTER_CLIENT_H_