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

net/tools/flip_server/split.cc

 // Copyright (c) 2009 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/split.h"
 
 #include <string.h>
 
 #include <vector>
 
-#include "base/string_piece.h"
+#include "base/strings/string_piece.h"
 
 namespace net {
 
 // Yea, this could be done with less code duplication using
 // template magic, I know.
 void SplitStringPieceToVector(const base::StringPiece& full,
                               const char* delim,
                               std::vector<base::StringPiece>* vec,
                               bool omit_empty_strings) {
   vec->clear();
@@ skipping 41 matching lines @@
       --e;
       if (e != s || !omit_empty_strings) {
         vec->push_back(base::StringPiece(s, e - s));
       }
     }
   }
 }
 
 }  // namespace net