Add QuicStringPiece which is actually StringPiece.

net/quic/core/quic_packet_generator.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/quic_packet_generator.h"
 
 #include <cstdint>
 
 #include "net/quic/core/quic_utils.h"
 #include "net/quic/platform/api/quic_bug_tracker.h"
 #include "net/quic/platform/api/quic_logging.h"
 
-using base::StringPiece;
-
 namespace net {
 
 QuicPacketGenerator::QuicPacketGenerator(QuicConnectionId connection_id,
                                          QuicFramer* framer,
                                          QuicBufferAllocator* buffer_allocator,
                                          DelegateInterface* delegate)
     : delegate_(delegate),
       packet_creator_(connection_id, framer, buffer_allocator, delegate),
       batch_mode_(false),
       should_send_ack_(false),
@@ skipping 298 matching lines @@
 void QuicPacketGenerator::set_encryption_level(EncryptionLevel level) {
   packet_creator_.set_encryption_level(level);
 }
 
 void QuicPacketGenerator::SetEncrypter(EncryptionLevel level,
                                        QuicEncrypter* encrypter) {
   packet_creator_.SetEncrypter(level, encrypter);
 }
 
 }  // namespace net