Add QuicStringPiece which is actually StringPiece.

net/quic/core/crypto/channel_id.cc

 // 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.
 
 #include "net/quic/core/crypto/channel_id.h"
 
 #include <cstdint>
 
 #include "third_party/boringssl/src/include/openssl/bn.h"
 #include "third_party/boringssl/src/include/openssl/ec.h"
 #include "third_party/boringssl/src/include/openssl/ecdsa.h"
 #include "third_party/boringssl/src/include/openssl/nid.h"
 #include "third_party/boringssl/src/include/openssl/sha.h"
 
-using base::StringPiece;
-
 namespace net {
 
 // static
 const char ChannelIDVerifier::kContextStr[] = "QUIC ChannelID";
 // static
 const char ChannelIDVerifier::kClientToServerStr[] = "client -> server";
 
 // static
-bool ChannelIDVerifier::Verify(StringPiece key,
-                               StringPiece signed_data,
-                               StringPiece signature) {
+bool ChannelIDVerifier::Verify(QuicStringPiece key,
+                               QuicStringPiece signed_data,
+                               QuicStringPiece signature) {
   return VerifyRaw(key, signed_data, signature, true);
 }
 
 // static
-bool ChannelIDVerifier::VerifyRaw(StringPiece key,
-                                  StringPiece signed_data,
-                                  StringPiece signature,
+bool ChannelIDVerifier::VerifyRaw(QuicStringPiece key,
+                                  QuicStringPiece signed_data,
+                                  QuicStringPiece signature,
                                   bool is_channel_id_signature) {
   if (key.size() != 32 * 2 || signature.size() != 32 * 2) {
     return false;
   }
 
   bssl::UniquePtr<EC_GROUP> p256(
       EC_GROUP_new_by_curve_name(NID_X9_62_prime256v1));
   if (p256.get() == nullptr) {
     return false;
   }
@@ skipping 37 matching lines @@
   }
   SHA256_Update(&sha256, signed_data.data(), signed_data.size());
 
   unsigned char digest[SHA256_DIGEST_LENGTH];
   SHA256_Final(digest, &sha256);
 
   return ECDSA_do_verify(digest, sizeof(digest), &sig, ecdsa_key.get()) == 1;
 }
 
 }  // namespace net