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

net/base/net_util_win.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/base/net_util.h"
 
 #include <iphlpapi.h>
 #include <wlanapi.h>
 
 #include <algorithm>
 
 #include "base/files/file_path.h"
 #include "base/lazy_instance.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/string_piece.h"
 #include "base/string_util.h"
+#include "base/strings/string_piece.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/utf_string_conversions.h"
 #include "base/win/scoped_handle.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/escape.h"
 #include "net/base/ip_endpoint.h"
 #include "net/base/net_errors.h"
 
 namespace net {
@@ skipping 232 matching lines @@
     case dot11_phy_type_erp:
       return WIFI_PHY_LAYER_PROTOCOL_G;
     case dot11_phy_type_ht:
       return WIFI_PHY_LAYER_PROTOCOL_N;
     default:
       return WIFI_PHY_LAYER_PROTOCOL_UNKNOWN;
   }
 }
 
 }  // namespace net