[Sync] Rename wifi_sync to sync_wifi.

components/sync_wifi/network_state_helper_chromeos.h

 // Copyright 2014 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.
 
-#ifndef COMPONENTS_WIFI_SYNC_NETWORK_STATE_HELPER_CHROMEOS_H_
-#define COMPONENTS_WIFI_SYNC_NETWORK_STATE_HELPER_CHROMEOS_H_
+#ifndef COMPONENTS_SYNC_WIFI_NETWORK_STATE_HELPER_CHROMEOS_H_
+#define COMPONENTS_SYNC_WIFI_NETWORK_STATE_HELPER_CHROMEOS_H_
 
 #include <string>
 
-#include "components/wifi_sync/wifi_credential.h"
+#include "components/sync_wifi/wifi_credential.h"
 
 namespace chromeos {
 class NetworkStateHandler;
 }
 
-namespace wifi_sync {
+namespace sync_wifi {
 
 // Returns a platform-agnostic representation of the ChromeOS network
 // configuration state. The configuration state is filtered, so that
 // only items related to ChromeOS |shill_profile_path| are returned.
 WifiCredential::CredentialSet GetWifiCredentialsForShillProfile(
     chromeos::NetworkStateHandler* network_state_handler,
     const std::string& shill_profile_path);
 
-}  // namespace wifi_sync
+}  // namespace sync_wifi
 
-#endif  // COMPONENTS_WIFI_SYNC_NETWORK_STATE_HELPER_CHROMEOS_H_
+#endif  // COMPONENTS_SYNC_WIFI_NETWORK_STATE_HELPER_CHROMEOS_H_