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

net/tools/flip_server/mem_cache.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/mem_cache.h"
 
 #include <dirent.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>
 
 #include <deque>
 
-#include "base/string_piece.h"
+#include "base/strings/string_piece.h"
 #include "net/tools/dump_cache/url_to_filename_encoder.h"
 #include "net/tools/dump_cache/url_utilities.h"
 #include "net/tools/flip_server/balsa_frame.h"
 #include "net/tools/flip_server/balsa_headers.h"
 
 // The directory where cache locates);
 std::string FLAGS_cache_base_dir = ".";
 
 namespace net {
 
@@ skipping 197 matching lines @@
   mci->file_data = GetFileData(filename);
   if (mci->file_data == NULL) {
     LOG(ERROR) << "Could not find file data for " << filename;
     return false;
   }
   return true;
 }
 
 }  // namespace net