net: Update the include paths of base/string_piece.h to its new location.

net/quic/quic_protocol.h

 // 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.
 
 #ifndef NET_QUIC_QUIC_PROTOCOL_H_
 #define NET_QUIC_QUIC_PROTOCOL_H_
 
 #include <stddef.h>
 #include <limits>
 #include <map>
 #include <ostream>
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/hash_tables.h"
 #include "base/logging.h"
-#include "base/string_piece.h"
+#include "base/strings/string_piece.h"
 #include "net/base/int128.h"
 #include "net/base/net_export.h"
 #include "net/quic/quic_bandwidth.h"
 #include "net/quic/quic_time.h"
 
 namespace net {
 
 using ::operator<<;
 
 class QuicPacket;
@@ skipping 625 matching lines @@
   NET_EXPORT_PRIVATE friend std::ostream& operator<<(
       std::ostream& os, const QuicConsumedData& s);
 
   size_t bytes_consumed;
   bool fin_consumed;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_PROTOCOL_H_