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

net/tools/quic/quic_dispatcher_test.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/tools/quic/quic_dispatcher.h"
 
 #include <string>
 
-#include "base/string_piece.h"
+#include "base/strings/string_piece.h"
 #include "net/quic/crypto/crypto_handshake.h"
 #include "net/quic/quic_crypto_stream.h"
 #include "net/quic/test_tools/quic_test_utils.h"
 #include "net/tools/flip_server/epoll_server.h"
 #include "net/tools/quic/quic_time_wait_list_manager.h"
 #include "net/tools/quic/test_tools/quic_test_utils.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using base::StringPiece;
@@ skipping 359 matching lines @@
   // And we'll resume where we left off when we get another call.
   EXPECT_CALL(*connection2(), OnCanWrite());
   dispatcher_.OnCanWrite();
 }
 
 
 }  // namespace
 }  // namespace test
 }  // namespace tools
 }  // namespace net