Add QuicStringPiece which is actually StringPiece.

net/quic/core/crypto/null_decrypter.cc

 // Copyright (c) 2012 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/core/crypto/null_decrypter.h"
 
 #include <cstdint>
 
 #include "net/base/int128.h"
 #include "net/quic/core/quic_data_reader.h"
 #include "net/quic/core/quic_utils.h"
 #include "net/quic/platform/api/quic_bug_tracker.h"
 
-using base::StringPiece;
 using std::string;
 
 namespace net {
 
 NullDecrypter::NullDecrypter(Perspective perspective)
     : perspective_(perspective) {}
 
-bool NullDecrypter::SetKey(StringPiece key) {
+bool NullDecrypter::SetKey(QuicStringPiece key) {
   return key.empty();
 }
 
-bool NullDecrypter::SetNoncePrefix(StringPiece nonce_prefix) {
+bool NullDecrypter::SetNoncePrefix(QuicStringPiece nonce_prefix) {
   return nonce_prefix.empty();
 }
 
-bool NullDecrypter::SetPreliminaryKey(StringPiece key) {
+bool NullDecrypter::SetPreliminaryKey(QuicStringPiece key) {
   QUIC_BUG << "Should not be called";
   return false;
 }
 
 bool NullDecrypter::SetDiversificationNonce(const DiversificationNonce& nonce) {
   QUIC_BUG << "Should not be called";
   return true;
 }
 
 bool NullDecrypter::DecryptPacket(QuicVersion version,
                                   QuicPacketNumber /*packet_number*/,
-                                  StringPiece associated_data,
-                                  StringPiece ciphertext,
+                                  QuicStringPiece associated_data,
+                                  QuicStringPiece ciphertext,
                                   char* output,
                                   size_t* output_length,
                                   size_t max_output_length) {
   QuicDataReader reader(ciphertext.data(), ciphertext.length());
   uint128 hash;
 
   if (!ReadHash(&reader, &hash)) {
     return false;
   }
 
-  StringPiece plaintext = reader.ReadRemainingPayload();
+  QuicStringPiece plaintext = reader.ReadRemainingPayload();
   if (plaintext.length() > max_output_length) {
     QUIC_BUG << "Output buffer must be larger than the plaintext.";
     return false;
   }
   if (hash != ComputeHash(version, associated_data, plaintext)) {
     return false;
   }
   // Copy the plaintext to output.
   memcpy(output, plaintext.data(), plaintext.length());
   *output_length = plaintext.length();
   return true;
 }
 
-StringPiece NullDecrypter::GetKey() const {
-  return StringPiece();
+QuicStringPiece NullDecrypter::GetKey() const {
+  return QuicStringPiece();
 }
 
-StringPiece NullDecrypter::GetNoncePrefix() const {
-  return StringPiece();
+QuicStringPiece NullDecrypter::GetNoncePrefix() const {
+  return QuicStringPiece();
 }
 
 const char* NullDecrypter::cipher_name() const {
   return "NULL";
 }
 
 uint32_t NullDecrypter::cipher_id() const {
   return 0;
 }
 
 bool NullDecrypter::ReadHash(QuicDataReader* reader, uint128* hash) {
   uint64_t lo;
   uint32_t hi;
   if (!reader->ReadUInt64(&lo) || !reader->ReadUInt32(&hi)) {
     return false;
   }
   *hash = MakeUint128(hi, lo);
   return true;
 }
 
 uint128 NullDecrypter::ComputeHash(QuicVersion version,
-                                   const StringPiece data1,
-                                   const StringPiece data2) const {
+                                   const QuicStringPiece data1,
+                                   const QuicStringPiece data2) const {
   uint128 correct_hash;
   if (version > QUIC_VERSION_36) {
     if (perspective_ == Perspective::IS_CLIENT) {
       // Peer is a server.
       correct_hash = QuicUtils::FNV1a_128_Hash_Three(data1, data2, "Server");
 
     } else {
       // Peer is a client.
       correct_hash = QuicUtils::FNV1a_128_Hash_Three(data1, data2, "Client");
     }
   } else {
     correct_hash = QuicUtils::FNV1a_128_Hash_Two(data1, data2);
   }
   uint128 mask = MakeUint128(UINT64_C(0x0), UINT64_C(0xffffffff));
   mask <<= 96;
   correct_hash &= ~mask;
   return correct_hash;
 }
 
 }  // namespace net