Add QuicStringPiece which is actually StringPiece.

net/quic/chromium/crypto/channel_id_chromium.cc

 // Copyright 2014 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/chromium/crypto/channel_id_chromium.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/memory/ptr_util.h"
 #include "base/strings/string_util.h"
 #include "crypto/ec_private_key.h"
 #include "crypto/ec_signature_creator.h"
 #include "net/base/net_errors.h"
 #include "net/cert/asn1_util.h"
 #include "net/ssl/channel_id_service.h"
 
 namespace net {
 
 ChannelIDKeyChromium::ChannelIDKeyChromium(
     std::unique_ptr<crypto::ECPrivateKey> ec_private_key)
     : ec_private_key_(std::move(ec_private_key)) {}
 
 ChannelIDKeyChromium::~ChannelIDKeyChromium() {}
 
-bool ChannelIDKeyChromium::Sign(base::StringPiece signed_data,
+bool ChannelIDKeyChromium::Sign(QuicStringPiece signed_data,
                                 std::string* out_signature) const {
   std::unique_ptr<crypto::ECSignatureCreator> sig_creator(
       crypto::ECSignatureCreator::Create(ec_private_key_.get()));
   if (!sig_creator) {
     return false;
   }
   const size_t len1 = strlen(ChannelIDVerifier::kContextStr) + 1;
   const size_t len2 = strlen(ChannelIDVerifier::kClientToServerStr) + 1;
   std::vector<uint8_t> data(len1 + len2 + signed_data.size());
   memcpy(&data[0], ChannelIDVerifier::kContextStr, len1);
@@ skipping 177 matching lines @@
     active_jobs_[job_ptr] = std::move(job);
   }
   return status;
 }
 
 void ChannelIDSourceChromium::OnJobComplete(Job* job) {
   active_jobs_.erase(job);
 }
 
 }  // namespace net