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

net/tools/flip_server/balsa_frame.cc

 // Copyright (c) 2011 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/flip_server/balsa_frame.h"
 
 #include <assert.h>
 #if __SSE2__
 #include <emmintrin.h>
 #endif  // __SSE2__
 #include <strings.h>
 
 #include <limits>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/logging.h"
 #include "base/port.h"
-#include "base/string_piece.h"
+#include "base/strings/string_piece.h"
 #include "net/tools/flip_server/balsa_enums.h"
 #include "net/tools/flip_server/balsa_headers.h"
 #include "net/tools/flip_server/balsa_visitor_interface.h"
 #include "net/tools/flip_server/buffer_interface.h"
 #include "net/tools/flip_server/simple_buffer.h"
 #include "net/tools/flip_server/split.h"
 #include "net/tools/flip_server/string_piece_utils.h"
 
 namespace net {
 
@@ skipping 1557 matching lines @@
 #endif  // DEBUGFRAMER
   return current - input;
 }
 
 const uint32 BalsaFrame::kValidTerm1;
 const uint32 BalsaFrame::kValidTerm1Mask;
 const uint32 BalsaFrame::kValidTerm2;
 const uint32 BalsaFrame::kValidTerm2Mask;
 
 }  // namespace net